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Wilkniss Mountains
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Wilkniss Mountains
The Wilkniss Mountains (78°1′S 161°7′E / 78.017°S 161.117°E) form a prominent group of conical peaks and mountains, 10 nautical miles (19 km) long running north–south, located 9 nautical miles (17 km; 10 mi) east-southeast of Mount Feather in the Quartermain Mountains, Victoria Land, Antarctica. The mountains are 3 nautical miles (5.6 km; 3.5 mi) wide in the north portion where Mount Blackwelder, 2,340 metres (7,680 ft) high, and Pivot Peak 2,450 metres (8,040 ft) high, rise above ice-free valleys. Except for an outlying southwest peak, the south portion narrows to a series of mainly ice-covered smaller peaks.
The Wilkniss Mountains were named by United States Advisory Committee on Antarctic Names (US-ACAN) in 1992 after Peter E. Wilkniss, a chemist who from 1975 has served in various positions at the National Science Foundation, including Deputy Assistant Director of the Directorate for Scientific, Technological, and International Affairs; Director, Division of Polar Programs, 1984–93; senior science associate to the assistant director for Geosciences, from 1993.
The Wilkniss Mountains are south of the Knobhead massif, the southeastern part of the Quartermain Mountains. They are separated from Knobhead by the Ferrar Glacier, which flows east from its head near Mount Blackwelder. The Palais Glacier (78°02′S 161°19′E / 78.033°S 161.317°E) is a broad glacier, about 8 nautical miles (15 km; 9.2 mi) long, that flows north between Wilkniss Mountains and the Colwell Massif to enter Ferrar Glacier near its head. The Wilkniss Mountains are east of The Portal and Portal Mountain. Rampart Ridge is to the south.
There is a glacial drift deposit with a terminal moraine 1 to 4 metres (3 ft 3 in to 13 ft 1 in) high in Vernier Valley at an elevation of 1,400 to 1,500 metres (4,600 to 4,900 ft), one of four moraines deposited by ice flowing from the Ferrar Glacier into the valley. The Ferrar drifts have ages around 4.0–3.4 million years, 1.2 million years, 700 thousand years and 50 thousand years. This stability of ice surface elevation suggests that over the last 4 million years the upland regions of the McMurdo Dry Valleys have experienced minimal climatic amelioration.
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77°58′S 161°09′E / 77.967°S 161.150°E. An ice-free valley on the east side of Mount Blackwelder in the northeast part of Wilkniss Mountains, Victoria Land. The name is one of a group in the area associated with surveying applied in 1993 by NZGB; vernier being a graduated scale used on measuring instruments to allow the reading of finer subdivisions.
77°59′S 161°04′E / 77.983°S 161.067°E. A sharp, mainly ice-free peak in north Wilkniss Mountains, rising to 2,340 metres (7,680 ft) west of Vernier Valley and 6 nautical miles (11 km; 6.9 mi) north of Pivot Peak. Mapped by USGS from surveys and United States Navy aerial photographs, 1947–59. Named by US-ACAN in 1984 after Lieutenant Commander Billy G. Blackwelder, United States Navy, Senior Helicopter Pilot, Antarctic Development Squadron Six (VXE-6), United States Navy OpDFrz, 1971–72 and 1975–77.
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Wilkniss Mountains
The Wilkniss Mountains (78°1′S 161°7′E / 78.017°S 161.117°E) form a prominent group of conical peaks and mountains, 10 nautical miles (19 km) long running north–south, located 9 nautical miles (17 km; 10 mi) east-southeast of Mount Feather in the Quartermain Mountains, Victoria Land, Antarctica. The mountains are 3 nautical miles (5.6 km; 3.5 mi) wide in the north portion where Mount Blackwelder, 2,340 metres (7,680 ft) high, and Pivot Peak 2,450 metres (8,040 ft) high, rise above ice-free valleys. Except for an outlying southwest peak, the south portion narrows to a series of mainly ice-covered smaller peaks.
The Wilkniss Mountains were named by United States Advisory Committee on Antarctic Names (US-ACAN) in 1992 after Peter E. Wilkniss, a chemist who from 1975 has served in various positions at the National Science Foundation, including Deputy Assistant Director of the Directorate for Scientific, Technological, and International Affairs; Director, Division of Polar Programs, 1984–93; senior science associate to the assistant director for Geosciences, from 1993.
The Wilkniss Mountains are south of the Knobhead massif, the southeastern part of the Quartermain Mountains. They are separated from Knobhead by the Ferrar Glacier, which flows east from its head near Mount Blackwelder. The Palais Glacier (78°02′S 161°19′E / 78.033°S 161.317°E) is a broad glacier, about 8 nautical miles (15 km; 9.2 mi) long, that flows north between Wilkniss Mountains and the Colwell Massif to enter Ferrar Glacier near its head. The Wilkniss Mountains are east of The Portal and Portal Mountain. Rampart Ridge is to the south.
There is a glacial drift deposit with a terminal moraine 1 to 4 metres (3 ft 3 in to 13 ft 1 in) high in Vernier Valley at an elevation of 1,400 to 1,500 metres (4,600 to 4,900 ft), one of four moraines deposited by ice flowing from the Ferrar Glacier into the valley. The Ferrar drifts have ages around 4.0–3.4 million years, 1.2 million years, 700 thousand years and 50 thousand years. This stability of ice surface elevation suggests that over the last 4 million years the upland regions of the McMurdo Dry Valleys have experienced minimal climatic amelioration.
Download coordinates as:
Features include:
77°58′S 161°09′E / 77.967°S 161.150°E. An ice-free valley on the east side of Mount Blackwelder in the northeast part of Wilkniss Mountains, Victoria Land. The name is one of a group in the area associated with surveying applied in 1993 by NZGB; vernier being a graduated scale used on measuring instruments to allow the reading of finer subdivisions.
77°59′S 161°04′E / 77.983°S 161.067°E. A sharp, mainly ice-free peak in north Wilkniss Mountains, rising to 2,340 metres (7,680 ft) west of Vernier Valley and 6 nautical miles (11 km; 6.9 mi) north of Pivot Peak. Mapped by USGS from surveys and United States Navy aerial photographs, 1947–59. Named by US-ACAN in 1984 after Lieutenant Commander Billy G. Blackwelder, United States Navy, Senior Helicopter Pilot, Antarctic Development Squadron Six (VXE-6), United States Navy OpDFrz, 1971–72 and 1975–77.