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Mount Terror (Antarctica)
Mount Terror (Antarctica)
Mount Terror (Antarctica)
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Mount Terror is an extinct volcano about 3,230 metres (10,600 ft) high on Ross Island, Antarctica, about 20 nautical miles (37 km; 23 mi) eastward of Mount Erebus.[1] Mount Terror was named in 1841 by polar explorer James Clark Ross for his second ship, HMS Terror.[1]

Key Information

Geology

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Mount Terror is a shield volcano that forms the eastern part of Ross Island, Antarctica. It has numerous cinder cones and domes on the flanks of the shield and is mostly under snow and ice. It is the second-largest of the four volcanoes that make up Ross Island.

Geography

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The rocks at the summit have not been studied, but rocks from the lower areas range from 0.82 to 1.75 million years old, and Mount Terror shows no signs of more recent volcanic activity. The first ascent of Mount Terror was made by a New Zealand party in 1959.[citation needed] The mountain is to the west of Cape Crozier, and east of Mount Terra Nova and Mount Erebus.[3]

Central features

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Map all coordinates using OpenStreetMap Download coordinates as KML
Ross Island. Mount Terror is to the east

Kienle Nunataks

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77°28′00″S 168°36′00″E / 77.4666667°S 168.6°E / -77.4666667; 168.6. Three aligned nunataks to the north of Mount Terror in northeast Ross Island. The nunataks trend east-west for 1 nautical mile (1.9 km; 1.2 mi) and rise to about 1,700 metres (5,600 ft). The central nunatak is 2.5 nautical miles (4.6 km; 2.9 mi) north-northeast of the Mount Terror summit. At the suggestion of P.R. Kyle, named by Advisory Committee on Antarctic Names (US-ACAN) after Juergen Kienle (d.), Geophysical Institute, University of Alaska, Fairbanks, a United States Antarctic Project (USAP) team leader for the investigation of volcanic activity and seismicity on Mount Erebus in six field seasons, 1980-81 through 1985-86.[4]

Mount Sutherland

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77°30′00″S 168°28′00″E / 77.5°S 168.4666667°E / -77.5; 168.4666667. A peak 1.4 nautical miles (2.6 km; 1.6 mi) west-northwest of the summit of Mount Terror on Ross Island. The feature rises to about 2,500 metres (8,200 ft). Named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Alexander L. Sutherland, Jr., Ocean Projects Manager, OPP, NSF, with responsibility for directing operations and logistics for United States Antarctic Project (USAP) research vessels from 1989; responsible for acquisition of the Research Vessel/Ice Breakers Nathaniel B. Palmer and Laurence M. Gould.[5]

Rohnke Crests

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77°35′00″S 168°41′00″E / 77.5833333°S 168.6833333°E / -77.5833333; 168.6833333. Two rock ridges, about 1,400 metres (4,600 ft) high, that are parallel and rise above the general ice mantle on the southeast slopes of Mount Terror. This feature is east of the head of Eastwind Glacier and 4 nautical miles (7.4 km; 4.6 mi) northeast of Conical Hill. Names in association with Eastwind Glacier after Captain (later Rear Admiral) Oscar C. Rohnke, USCG, who commanded United States Coast Guard Cutter (USCGC) Eastwind in Ross Sea during United States Navy (United States Navy) Operation Deep Freeze (OpDFrz) I, 1955-56.[6]

Moore Peak

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77°31′00″S 168°27′00″E / 77.5166667°S 168.45°E / -77.5166667; 168.45. A peak rising to 2,500 metres (8,200 ft) high on the west slope of Mount Terror, Ross Island. The peak is 1.6 nautical miles (3.0 km; 1.8 mi) west-southwest of the summit of Mount Terror and 1 nautical mile (1.9 km; 1.2 mi) south of Mount Sutherland. At the suggestion of P.R. Kyle, named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after James A. Moore, a member of the New Mexico Institute of Mining and Technology team on Mount Erebus in the 1983–84 and 1985-86 field seasons. He completed his M.S. thesis on the geology of Mount Erebus.[7]

Ohau Peak

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77°30′S 168°42′E / 77.5°S 168.7°E / -77.5; 168.7. A sharp rock peak 1.9 nautical miles (3.5 km; 2.2 mi) northeast of the summit of Mount Terror on Ross Island. The feature rises to about 2,400 metres (7,900 ft) high and is central in three aligned summits 0.8 nautical miles (1.5 km; 0.92 mi) north of Mount McIntosh. Named by New Zealand Geographic Board (NZGB) (2000) after a peak near the locality of Tekapo (see Tekapo Ridge), New Zealand.[8]

Giggenbach Ridge

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77°28′00″S 168°20′00″E / 77.4666667°S 168.3333333°E / -77.4666667; 168.3333333. A north-south chain of summits, 5 nautical miles (9.3 km; 5.8 mi) long, located to the west and northwest of Mount Terror. The ridge rises to about 2,400 metres (7,900 ft) west of Mount Terror, but descends to 1,320 metres (4,330 ft) at the north end. Named at the suggestion of P.R. Kyle, named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Werner F. Giggenbach, Chemistry Division, DSIR, who worked in the NZAP at Mount Erebus in four field seasons during the 1970s. He rappelled into the Inner Crater of Mount Erebus in 1978, but had to be pulled out when an eruption showered him and colleagues on the crater rim with volcanic bombs. He was one of the leading volcanic gas geochemists of the period.[9]

Chuan Peak

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77°29′00″S 168°21′00″E / 77.4833333°S 168.35°E / -77.4833333; 168.35. A peak, about 2,200 metres (7,200 ft) high, located 1 nautical mile (1.9 km; 1.2 mi) northeast of Barker Peak in the south part of Giggenbach Ridge, Ross Island. At the suggestion of P.R. Kyle, named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Raymond L. Chuan who, as a scientist with the Brunswick Corporation, Costa Mesa, CA, undertook many airborne surveys of volcanic aerosols from Mount Erebus and also did sampling at the crater rim, 1983–84 and 1986–87; investigator (with Julie Palais) on a project which examined aerosols between Mount Erebus and the South Pole.[10]

Manahan Peak

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77°29′00″S 168°26′00″E / 77.4833333°S 168.4333333°E / -77.4833333; 168.4333333. A prominent peak 1 nautical mile (1.9 km; 1.2 mi) east of Giggenbach Ridge in northeast Ross Island. The peak rises to over 2,000 metres (6,600 ft) high 2.6 nautical miles (4.8 km; 3.0 mi) northwest of the summit of Mount Terror. Named by the Advisory Committee on Antarctic Names (US-ACAN) (2000) after biologist Donal T. Manahan, who worked eight seasons in Antarctica from 1983; United States Antarctic Project (USAP) principal investigator in study of early stages (embryos larvae) of marine animals; chair, Polar Research Board, National Academy of Sciences, 2000.[11]

Barker Peak

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77°30′S 168°18′E / 77.5°S 168.3°E / -77.5; 168.3. A peak 3.6 nautical miles (6.7 km; 4.1 mi) west-northwest of Mount Terror on Ross Island. The feature rises to about 2,200 metres (7,200 ft) high and is the western of two peaks near the south end of Giggenbach Ridge. Name by New Zealand Geographic Board (NZGB) (2000) after Major James R. M. Barker, officer in command at Scott Base, 1970–71; a NZAP manager, 1970-86.[12]

Joyce Peak

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77°28′00″S 168°12′00″E / 77.4666667°S 168.2°E / -77.4666667; 168.2. A peak rising to over 1,400 metres (4,600 ft) high in the north-central part of Ross Island. It stands west of the main summits of Giggenbach Ridge and 5.3 miles (8.5 km) south-southeast of Wyandot Point. Named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Karen Joyce, a long-term ASA employee, who from 1990 made 10 deployments to McMurdo Station, including a winter-over; assisted with computers in the Crary Science and Engineering Center.[13]

Kristin Peak

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77°26′00″S 168°19′00″E / 77.4333333°S 168.3166667°E / -77.4333333; 168.3166667. A peak rising to over 1,300 metres (4,300 ft) high at the north end of Giggenbach Ridge on Ross Island. The feature is 4.5 nautical miles (8.3 km; 5.2 mi) south of Cape Tennyson. Named by Advisory Committee on Antarctic Names (US-ACAN) (2000) after Kristin Larson, who has participated in support activities to United States Antarctic Project (USAP) from 1988, including two winters at McMurdo Station; supervisor, Eklund Biological Center and Thiel Labs, 1988 and 1992; supervisor, Crary Science and Engineering Center, 1992–95; editor, The Antarctican Society newsletter from 1996; later of staff of OPP, NSF.[14]

Eastern features

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Features to the east, towards the Kyle Hills, include:

Tent Peak

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77°30′S 168°58′E / 77.500°S 168.967°E / -77.500; 168.967. A tent-shaped peak rising to about 1,570 metres (5,150 ft) high midway between Mount Terror and Cape Crozier. It was descriptively named by a party of the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1958–59, which occupied the peak as an astronomical control station, January 5, 1959, and erected a tent below the peak.[15]

The Tooth

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77°31′S 168°59′E / 77.517°S 168.983°E / -77.517; 168.983. A distinctive rock outcrop on the eastern slopes of Mount Terror at an elevation of about 1,400 metres (4,600 ft). The feature lies 1 nautical mile (1.9 km; 1.2 mi) south-southeast of Tent Peak and is reported to resemble a fossilized shark's tooth. Descriptively named by a party of the NZGSAE, 1958–59, working in eastern Ross Island.[16]

Slattery Peak

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77°34′00″S 168°59′00″E / 77.5666667°S 168.9833333°E / -77.5666667; 168.9833333. A somewhat isolated rock peak, about 600 metres (2,000 ft) high, that rises above the ice mantle southeast of Mount Terror. The peak position is additionally defined as 5.5 nautical miles (10.2 km; 6.3 mi) southwest of The Knoll and 3.8 nautical miles (7.0 km; 4.4 mi) east-northeast of Rohnke Crests. Named after Leo Slattery, who wintered at Scott Base three times, twice as Officer in Charge; Post Clerk on Ross Island, summer 1973-74; Postmaster on Ross Island, summers 1979-80, 1981–82, and 1983–84.[17]

Pönui Nunatak

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77°35′00″S 169°01′00″E / 77.5833333°S 169.0166667°E / -77.5833333; 169.0166667. A nunatak located 0.6 nautical miles (1.1 km; 0.69 mi) southeast of Slattery Peak and 5.6 nautical miles (10.4 km; 6.4 mi) southwest of The Knoll. The feature rises to 320 metres (1,050 ft) high near the juncture of the island and Ross Ice Shelf. The name Ponui (meaning south wind) is one of several Maori wind names applied by New Zealand Geographic Board (NZGB) in this vicinity.[18]

Conical Hill

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77°39′S 168°34′E / 77.650°S 168.567°E / -77.650; 168.567. A small but distinctive rock hill, 655 metres (2,149 ft) high, on the south slopes of Mount Terror, above Cape MacKay. Given this descriptive name by the British Antarctic Expedition, 1910–13, under Scott.[19]

Cultural references

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References

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Sources

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Public Domain This article incorporates public domain material from websites or documents of the United States Geological Survey.

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Revisions and contributorsEdit on WikipediaRead on Wikipedia

Mount Terror (Antarctica)

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Mount Terror is a large basaltic forming the eastern portion of in , standing at an elevation of 3,262 meters (10,702 feet) above . It features numerous pyroclastic cones and lava domes and is considered extinct, with its last known eruption occurring during the Pleistocene epoch and no activity recorded. The mountain was named in 1841 by British explorer Sir during his Antarctic expedition aboard the ships and HMS Terror, honoring his vessel HMS Terror. , where Mount Terror is located, lies in the and overlooks the , with the volcano's glaciated slopes contributing to the dramatic landscape near . Adjacent to the active , Mount Terror forms part of a volcanic province that has been studied for its geological significance in understanding Antarctic volcanism and rift-related magmatism. Geologically, Mount Terror's shield structure indicates effusive eruptions in the past, primarily basaltic in composition, and it remains a key site for research on the region's tectonic setting within the West Antarctic Rift System. Exploration of Mount Terror has been limited by its remote, harsh environment.

Overview

Location and Coordinates

Mount Terror is situated on the eastern side of in , at coordinates 77°31′S 168°32′E. This position places it approximately 20 nautical miles (37 km) east of , the island's prominent western volcano. The mountain lies in close proximity to several key Antarctic features, including Cape Crozier to its southeast, Mount Terra Nova to its west, and the expansive bordering it to the south. As a major component of the McMurdo Volcanic Group, Mount Terror contributes significantly to forming the eastern portion of , part of the broader volcanic province in the region.

Physical Characteristics

Mount Terror is a prominent shield volcano located on the eastern side of in . It rises to an elevation of 3,262 m (10,702 ft) above , making it one of the highest peaks in the region. The mountain's measures 1,728 m (5,669 ft), emphasizing its isolation and stature relative to surrounding terrain. As a classic , Mount Terror exhibits broad, gently sloping flanks that extend outward from a central summit, characteristic of low-viscosity basaltic lava flows that built the edifice over time. Its surfaces are predominantly covered by snow and ice, with exposed rock limited to higher elevations and ridges, contributing to its stark, white appearance in Antarctic landscapes. The is considered extinct, with no recorded eruptions during the epoch. This contrasts sharply with its neighbor, , a dormant but occasionally that continues to exhibit fumarolic activity and minor eruptions.

Geology

Formation and Age

Mount Terror formed as part of the Erebus Volcanic Province, the largest volcanic province in , which extends approximately 450 km north-south and 170 km east-west and is dominated by large central volcanoes including Mounts , Bird, Terror, Discovery, and Morning. Volcanic activity in this province initiated around 19 million years ago during the and continued through the into the , with the majority of eruptions occurring less than 5 million years ago. Specifically for Mount Terror, a basaltic , the main edifice developed during the early to middle Pleistocene, building up through eruptions of and related lavas. The rocks comprising Mount Terror are primarily dated to between 1.75 and 0.82 million years old, based on K-Ar and 40Ar/39Ar geochronology of and flows from the lower slopes and regions. Older basaltic shield components, potentially extending back to the late , underlie these younger units and reflect prolonged construction of the volcanic massif. Mount Terror's development is tectonically linked to the West Antarctic Rift System, an intracontinental along the western flank of which the Volcanic Province is situated, where extension facilitates magma ascent. This rifting is associated with hotspot-like in the region, characterized by alkaline magmatism derived from of the mantle. Additionally, the adjacent Terror Rift in the influences underlying mantle dynamics, as evidenced by a 2020 seismic study revealing beneath the rift that promotes radial anisotropy and enhanced mantle flow supporting regional .

Volcanic Features

Mount Terror exhibits a variety of volcanic landforms primarily on its flanks, including numerous pyroclastic cones, lava domes, and cinder cones, which are characteristic of its morphology. These features, formed during past eruptions, contribute to the 's broad, gently sloping profile and are remnants of explosive and effusive activity that built the edifice over time. The dominant rock composition of Mount Terror is basaltic, specifically basanitic, reflecting mafic magmas from its volcanic history, with minor andesitic elements such as trachyandesite present in older lava flows. This bimodal distribution underscores the volcano's evolution from more primitive basaltic eruptions to localized differentiation producing intermediate compositions. Thick ice and snow cover much of Mount Terror's surface, obscuring many of these volcanic features and limiting direct observation, while the volcano's extinct status results in minimal geothermal activity and no discernible fumaroles or hot springs. Unlike its neighbor Mount Erebus, which hosts an active lava lake and ongoing emissions, Mount Terror lacks any active vents, with its most recent eruptions occurring approximately 1 million years ago during the Pleistocene.

Geography and Topography

Summit and Slopes

The summit of Mount Terror stands at 3,262 meters above sea level, presenting a broad and rounded profile typical of volcanoes. This configuration results from the accumulation of fluid basaltic lavas that form expansive, low-relief domes. The mountain's slopes exhibit a transition from steeper upper sections to more gradual lower flanks, with typical gradients averaging around 9 degrees across the structure. These gentle overall inclines reflect the shield morphology, facilitating extensive ice accumulation while posing challenges for ascent due to the glaciated terrain. As part of the eastern extension of , Mount Terror's profile contributes to the archipelago's distinctive volcanic topography. A permanent envelops the summit and upper elevations year-round, supporting multiple outlet glaciers that descend the flanks. These glaciers feature crevasses, particularly along eastern approaches where ice flow converges and fractures. From , approximately 60 kilometers to the east, Mount Terror dominates the eastern horizon as a striking . Its substantial mass influences the regional by deflecting southerly winds, creating zones of flow divergence and relatively calmer conditions in adjacent lowlands.

Surrounding Terrain

Mount Terror, situated on the eastern flank of , borders the expansive to the south, where the shelf's elevated surface rises above sea level and integrates with the island's southern margins. To the north, the mountain overlooks the , characterized by seasonal that contrasts with the more stable, thicker to the south. , including Mount Terror, functions as a significant topographic barrier that disrupts the westward flow of the , channeling ice around its perimeter and contributing to localized variations in ice dynamics near the shelf's eastern boundary. This barrier effect influences the broader circulation patterns of the , where the island's volcanic massif diverts flow and promotes the formation of distinct ice streams adjacent to its coasts. Approximately 80 kilometers to the west across lie the , a hyper-arid region shielded by the , whose proximity exposes the eastern Ross Island terrain to intense katabatic winds descending from the polar plateau. These powerful downslope winds, often exceeding 100 km/h, scour the surrounding landscape, enhancing evaporation and contributing to the extreme aridity around Mount Terror while modulating local weather patterns over the and ice shelf. Recent observations indicate a slight retreat in ice cover around , including areas near Mount Terror, amid broader climate change impacts such as increased surface melting in the sector since the late 1990s, with accelerated trends noted through 2025. These changes, driven by warmer air temperatures and altered , have led to minor reductions in glacier extent on the island's flanks, though the overall remains relatively stable compared to other regions.

Named Features

Central Features

The central features of Mount Terror encompass a cluster of nunataks, peaks, and ridges primarily situated north and west of the , forming key rock exposures amid the volcano's ice-covered flanks. These elements highlight the mountain's basaltic composition and glacial patterns, contributing to its rugged on [Ross Island](/page/Ross Island). The Kienle Nunataks consist of three aligned rocky outcrops trending east-west for 1.61 kilometers, located north of the summit in northeastern . Rising to approximately 1,700 meters, these nunataks protrude from the surrounding ice, with the central one positioned 4.02 kilometers north-northeast of Mount Terror's summit. They were named by the Advisory Committee on Antarctic Names (US-ACAN) in honor of volcanologist Juergen Kienle, who contributed to studies of volcanoes through the Geophysical Institute at the University of . Mount Sutherland is a prominent peak reaching about 2,500 meters, situated 2.25 kilometers west-northwest of the summit on . As part of Mount Terror's basaltic shield structure, it features exposed rock faces typical of the volcano's alkaline lava flows. The peak was named by US-ACAN in 2000 after Alexander L. Sutherland, Jr., an oceanographer who advanced logistics for research vessels. The Rohnke Crests comprise two parallel rock ridges elevating to around 1,400 meters on the southeast slopes of Mount Terror, emerging above the pervasive ice mantle. Positioned east of the head of Eastwind Glacier and approximately 6.4 kilometers northeast of , these ice-free ridges reflect the erosional exposure of underlying . They honor Oscar C. Rohnke of the , who commanded the USCGC Eastwind during I in 1955-1956. Moore Peak rises to circa 2,500 meters on the western slope of Mount Terror, located 2.6 kilometers west-southwest of the summit and 1.6 kilometers south of Mount Sutherland on . This feature exemplifies the subsidiary volcanic summits within the mountain's edifice. It was designated by US-ACAN in 2000 to recognize geologist James A. Moore, who conducted fieldwork on during the 1983-1984 and 1985-1986 seasons. Ohau Peak stands as a sharp rock peak attaining approximately 2,400 meters, 3.1 kilometers northeast of the summit and central among three aligned summits 1.3 kilometers north of Mount McIntosh on Ross Island. Its distinctive pointed form marks a notable exposure in the northeastern central zone. Named by the New Zealand Geographic Board in 2000 after a peak near Lake Tekapo in New Zealand, it underscores international contributions to Antarctic naming conventions.

Giggenbach Ridge Features

Giggenbach Ridge is a north-south trending chain of volcanic summits approximately 8.5 km (5 nautical miles) long, situated on the west-northwest slopes of Mount Terror on , . The ridge forms a prominent linear extension from the main shield of Mount Terror, rising to a maximum elevation of 2546 m near its western extent before descending to around 1100 m at the northern end. It was named in 2001 by the Antarctic Place-Names Committee after Werner F. Giggenbach, a geochemist who conducted pioneering studies on volcanic gases in the region from the 1970s onward. The southern end of Giggenbach Ridge is marked by Barker Peak, a summit rising to about 2200 m, located 5.8 km west-northwest of Mount Terror and recognized as the western of two peaks in this sector. Named after glaciologist of , who conducted observations on in 1970–1971, the peak exemplifies the ridge's rugged, glaciated terrain shaped by the broader volcanic history of the region. Immediately northeast of Barker Peak lies Chuan Peak, at approximately 2200 m elevation in the southern portion of the ridge, honoring geochemist Raymond L. Chuan for his research on volcanic aerosols at nearby during the 1980s. Further north along the ridge, the terrain transitions to lower elevations, culminating at Kristin Peak, which rises to over 1300 m and lies about 7.2 km south of Cape Tennyson. This northern terminus was named in 2000 by the U.S. Advisory Committee on Antarctic Names (US-ACAN) after geologist Kristin McAfee of the University of Colorado, who contributed to geological surveys on Ross Island in the 1990s. Adjacent to the ridge's eastern flank is Manahan Peak, exceeding 2000 m in height and positioned 1.6 km east of the main summits, 4.2 km northwest of Mount Terror's summit; it commemorates biologist Donal T. Manahan for his extensive Antarctic research starting in 1983. To the west, Joyce Peak stands at over 1400 m in the north-central area near the ridge, named for Joyce D. Joyce, who provided logistical support in Antarctica during the 1980s.

Eastern Features

The eastern and southeastern flanks of Mount Terror feature several lower-elevation peaks and nunataks that protrude through the surrounding ice, descending gradually toward Cape Crozier and the . These landforms, primarily volcanic remnants, include distinctive pyramidal and spire-like structures that contrast with the broader shield volcano's profile. Tent Peak, rising to approximately 1,570 meters on the east flank, is a pyramid-shaped formation topped by a tent-like , situated midway between Mount Terror and Cape Crozier. This feature was descriptively named by members of the Geological and Survey Antarctic Expedition (NZGSAE) in 1958–59 due to its resemblance to a tent. It marks a notable transition in the terrain as elevations decrease eastward. Further along the jagged eastern slope lies The Tooth, an ice-free spire reaching about 1,400 meters that evokes the shape of a fossilized shark's tooth. Surveyed during the NZGSAE fieldwork in 1958–59, it was consistently referred to by this descriptive name for its prominent, pointed pinnacle rising above the ice mantle. This feature highlights the erosional sculpting of in the region's harsh environment. On the southeastern side, Slattery Peak forms a low ridge at around 600 meters, standing somewhat isolated above the ice approximately 5.5 nautical miles southeast of Mount Terror's summit. Named after Leo Slattery, who wintered at three times, twice as Officer in Charge, served as Post Clerk on in summer 1973-74, and as Postmaster in 1979-80, 1981-82, and 1983-84, it exemplifies the subdued near the island's periphery. Closer to the Ross Ice Shelf, Pönui Nunatak emerges as an isolated rock outcrop at 320 meters, located 0.6 miles southeast of Slattery Peak and 5.6 miles southwest of The Knoll. This nunatak, bearing the Māori name meaning "hill," sits near the juncture of Ross Island and the ice shelf, serving as a key marker in the descent from higher elevations. Among the southern slopes, Conical Hill stands at 655 meters as a small remnant of a cinder cone, characteristic of the parasitic vents associated with Mount Terror's shield volcanism. Documented as part of the volcano's flank features, it contributes to the diverse array of low-relief volcanic landforms on the eastern periphery.

Exploration and History

Discovery and Naming

Mount Terror was first sighted on January 28, 1841, during the led by Captain aboard the ships and HMS Terror. The expedition, which aimed to explore the southern magnetic pole and chart unknown regions of the , had navigated through the and approached after breaking through pack ice. From the deck of , the crew observed the prominent volcanic peak rising sharply from the island's eastern side, distinguishing it from the they had named earlier that day. Ross immediately named the mountain Mount Terror in honor of his second ship, HMS Terror, a converted designed for naval bombardment with reinforced hulls to withstand explosive forces. This complemented the earlier designation of for the flagship, reflecting the expedition's tradition of honoring its vessels amid the harsh environment. The ships, both from the era, were chosen for their sturdy construction to endure the ice pressures of polar waters. No prior records of the mountain exist before this sighting, as the expedition marked the first documented human approach to the region. Early surveys by the expedition positioned Mount Terror as the second-highest peak on , standing at 3,262 meters (10,702 feet) and located about 20 miles (32 kilometers) east of . Ross's charts depicted it as a dormant with steep, ice-covered slopes, contributing to the broader mapping of the Ross Island volcanic complex during the four-year voyage. These initial observations laid the foundation for future geography, highlighting the area's significant volcanic activity within the isolated .

First Ascent and Expeditions

The first ascent of Mount Terror was achieved on 18 January 1959 by members of the New Zealand Geological and Survey Expedition, with Jim G. Wilson, Mike R. White, and Bruce Alexander reaching the summit. This 12-member expedition, redirected to due to impassable ice blocking their original destinations of Wood Bay and Terra Nova Bay on 11 December 1958, operated from near to facilitate access to . The climb required navigating snow and ice slopes amid crevassed terrain, highlighting the logistical demands of early . Subsequent human expeditions to Mount Terror have been sparse, constrained by the peak's remoteness, extreme weather, and the logistical challenges of operating in the region. In the 1960s, the US Navy contributed significantly through aerial mapping operations under , using tricamera photography taken between 1956 and 1970 to compile detailed topographic charts of , including Mount Terror, without additional manned ascents. These efforts provided essential baseline data for future studies while underscoring the difficulties of ground-based access, as severe conditions often limited on-site activities to brief windows. Advancements in since 2020 have supported topographic surveys of Antarctic features, including those on . No manned ascents of Mount Terror have been reported as of 2025, reflecting a shift toward technology-driven amid ongoing environmental and safety constraints.

Scientific Studies

Scientific studies of Mount Terror have primarily focused on its volcanic , ice cover, and role within the broader volcanic system, with research accelerating since the mid-20th century despite logistical challenges in . In the 1960s and 1970s, petrologic examinations of basaltic samples from Mount Terror were conducted by U.S. Geological Survey (USGS) and geologists, including summit investigations during the 1969-1970 austral summer that described the dominant compositions and associated pyroclastic deposits. These efforts, building on K-Ar dating, established activity in the late to , with dated phonolites at approximately 0.8 ± 0.5 Ma and cones at Cape Crozier dated 1.3–1.75 Ma. By the 1980s, additional USGS and team studies confirmed the shield volcano's petrogenesis through alkali-olivine magmas, highlighting similarities to other centers. Advancing into the 2000s, technologies enabled non-invasive assessments of Mount Terror's ice cover and volume, crucial for understanding glaciological dynamics in a region influenced by the . These methods addressed previous data gaps from ground-based surveys, providing baseline metrics for monitoring environmental changes amid Antarctic warming. A significant geophysical advancement came in 2020 with P-wave imaging the beneath the Terror Rift, where Mount Terror is situated, revealing low-velocity zones indicative of partial melt and asthenospheric upwelling at depths of 100-200 km. This AGU-published study linked rift-related extension to volcanic activity, showing radial patterns that suggest horizontal mantle flow supporting the hotspot. Limited fieldwork persists due to and remoteness, constraining direct sampling to opportunistic collections near accessible features like the eastern flanks. Mount Terror's extinct status offers a key analog for interpreting active volcanism at neighboring , illustrating evolutionary stages of shield-building within the Erebus Volcanic Province and its ties to West Antarctic Rift System . Ongoing monitoring, including observations of ice melt, continues to integrate Mount Terror's data into models of regional and sea-level contributions as of 2025.

Cultural Significance

Naming Inspiration

Mount Terror derives its name from HMS Terror, a launched by the Royal Navy in and engineered for intense naval bombardments, featuring a robust hull reinforced to support two massive 13-inch mortars capable of firing explosive shells over long distances. This vessel, one of three in the Vesuvius-class, was built with double oak planking to endure the recoil from its primary armaments, emphasizing its role in projecting terror upon enemy shores during conflicts like the War of 1812. In 1841, during the British Antarctic Expedition led by James Clark Ross, the dormant volcano was formally named Mount Terror by its discoverer to commemorate the ship that had carried the expedition to the Ross Island region, with the nearby active volcano designated Mount Erebus after the flagship HMS Erebus. This pairing honored the vessels central to the four-year voyage of magnetic and geographic discovery, reflecting Ross's tradition of bestowing ship names upon significant landmarks encountered. The selection evokes the inherent perils of polar exploration, as the name "Terror"—rooted in the ship's intimidating wartime purpose—mirrors the daunting ice barriers and unknown hazards that impeded the expedition's progress. No indigenous names for the feature have been recorded, consistent with the absence of permanent human populations in Antarctica prior to European exploration. Subsequent naming of subsidiary features has shifted toward honoring scientific contributors, such as the Kienle Nunataks—a trio of aligned rock outcrops 2.5 miles north-northeast of the summit—named in recognition of geophysicist Juergen Kienle for his pioneering seismic and volcanic research in the Ross Island area. Over time, the nomenclature has evolved from its nautical origins symbolizing maritime might and exploratory risk to representing a key stratigraphic and volcanic landmark in Antarctic geology.

References in Media

Mount Terror appears in James Clark Ross's 1847 expedition narrative A Voyage of Discovery and Research in the Southern and Antarctic Regions, where it is depicted as a striking volcanic landmark observed during the 1841 sighting of . In modern literature, the mountain serves as a plot location in Michael Crichton's 2004 eco-thriller , with characters arriving at Weddell Station near Mount Terror to investigate environmental claims. It is also alluded to in Jules Verne's 1870 novel Twenty Thousand Leagues Under the Sea, within discussions of Antarctic geography and the exploratory voyages that named the region's volcanic features. Mount Terror is the stronghold of Russian anarchist revolutionaries in George Griffith's 1894 novel Olga Romanoff. The 2018 AMC television series The Terror, adapted from Dan Simmons's 2007 novel of the same name, evokes the historical HMS Terror ship that inspired the mountain's name but does not depict the peak itself. Documentaries on Ross Island's volcanism frequently highlight Mount Terror alongside the active . Scientific media coverage in the 2020s has featured Mount Terror in articles on Antarctic , including a 2022 NASA Earth Observatory image analysis republished by SciTechDaily, portraying the dormant volcano as a less intimidating presence despite its evocative name. Unlike more mythical polar sites, Mount Terror lacks major legends and instead symbolizes the stark isolation of Antarctic landscapes in broader lore.

References

  1. https://volcano.si.edu/volcano.cfm?vn=390813
  2. https://earthobservatory.nasa.gov/images/150528/a-mountain-of-terror
  3. https://beyondpenguins.ehe.osu.edu/issue/earths-changing-surface/mt-erebus-then-and-now
  4. https://www.nsf.gov/news/bringing-magma-our-feet-antarctica
  5. https://cmr.earthdata.nasa.gov/search/concepts/C1214591821-SCIOPS.html
  6. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=132591
  7. https://www.ats.aq/devph/en/apa-database/29
  8. https://www.wikidata.org/wiki/Q1056741
  9. https://pubs.geoscienceworld.org/gsl/books/edited-volume/2349/chapter/132277137/Chapter-5-2a-Erebus-Volcanic-Province-volcanology
  10. https://pubs.geoscienceworld.org/gsa/geosphere/article/8/6/1342/132608/Early-Miocene-volcanic-activity-and
  11. https://www.researchgate.net/publication/283916998_Mount_Terror_in_Le_Masurier_and_Thomson_eds_Volcanoes_of_the_Antarctic_Plate_and_Southern_Oceans
  12. https://pubs.geoscienceworld.org/gsl/books/edited-volume/2349/chapter/132277245/Chapter-5-2b-Erebus-Volcanic-Province-petrology
  13. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GC008568
  14. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL086511
  15. https://www.lyellcollection.org/doi/10.1144/m55-2018-80
  16. https://nipr.repo.nii.ac.jp/record/2532/files/KJ00002368069.pdf
  17. https://pubs.usgs.gov/pp/p1386b/p1386b.pdf
  18. https://www.wgtn.ac.nz/antarctic/publications/antarctic-data-series/ADS10.pdf
  19. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2005JD006185
  20. https://journals.ametsoc.org/view/journals/mwre/131/2/1520-0493_2003_131_0435_ahrnso_2.0.co_2.xml
  21. https://climate.envsci.rutgers.edu/Antarctica/where.html
  22. https://www.nature.com/articles/s43247-025-02077-8
  23. https://www.researchgate.net/profile/Philip-Kyle/publication/283916998_Mount_Terror_in_Le_Masurier_and_Thomson_eds_Volcanoes_of_the_Antarctic_Plate_and_Southern_Oceans/links/56d70e2408aebabdb402ff4a/Mount-Terror-in-Le-Masurier-and-Thomson-eds-Volcanoes-of-the-Antarctic-Plate-and-Southern-Oceans.pdf
  24. https://gazette.govt.nz/notice/id/2001-ln3189
  25. https://adam.antarcticanz.govt.nz/nodes/view/18864
  26. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=132366
  27. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=130902
  28. https://gazette.govt.nz/notice/id/2004-ln4107
  29. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=129070
  30. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=129619
  31. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=134145
  32. https://www.adam.antarcticanz.govt.nz/nodes/view/18685
  33. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=123556
  34. https://www.adam.antarcticanz.govt.nz/nodes/view/18869
  35. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=128382
  36. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=127183
  37. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=132560
  38. https://adam.antarcticanz.govt.nz/nodes/view/21845
  39. https://adam.antarcticanz.govt.nz/nodes/view/21882
  40. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=114401
  41. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=130256
  42. https://www.south-pole.com/p0000081.htm
  43. http://www.classicstamps.co.nz/Monographs/Ross%20Dependency%20Postal%20History/Chapter_4.pdf
  44. https://www.thepress.co.nz/nz-news/350037341/intrepid-trio-recognised-first-ascent-mt-terror
  45. https://s3.amazonaws.com/Antarctica/AJUS/AJUSvVn4/AJUSvVn4p103.pdf
  46. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/AR048p0018
  47. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021RG000767
  48. https://www.rmg.co.uk/stories/maritime-history/hms-terror-erebus-history-franklin-lost-expedition
  49. https://www.lindahall.org/about/news/scientist-of-the-day/hms-terror/
  50. https://en.wikisource.org/wiki/A_Voyage_of_Discovery_and_Research_in_the_Southern_and_Antarctic_Regions/Volume_1/Chapter_8
  51. https://www.canadiangeographic.ca/articles/five-interesting-facts-about-the-hms-terror/
  52. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=134161
  53. https://www.supersummary.com/state-of-fear/part-2-pages-181-256/
  54. https://www.gutenberg.org/cache/epub/54096/pg54096-images.html
  55. https://www.imdb.com/title/tt2708480/
  56. https://scitechdaily.com/antarctic-volcano-a-mountain-of-terror/
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