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Pearson Isles
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Pearson Isles
Pearson Isles (also called the Pearson Islands, Pearson Group and Pearson Archipelago) is an island group located in the Australian state of South Australia about 65 kilometres (40 miles) to 72 kilometres (45 miles) west south-west of Cape Finniss on the west coast of Eyre Peninsula within the larger island group, the Investigator Group. The group was discovered and named by Matthew Flinders on 13 February 1802. The group has four members - Pearson Island, a pair of islands known as the Veteran Isles and Dorothee Island. The island group has enjoyed protected area status starting in 1916 and since 2011, it has been part of the Investigator Group Wilderness Protection Area. The island group is notable as a venue for scientific research.
Pearson Isles is an island group located in waters from between 65 kilometres (40 miles) to 72 kilometres (45 miles) west south-west of Cape Finniss on the west coast of Eyre Peninsula in South Australia. The group consists of the following islands in order of increasing distance from the Australian continental coastline - Pearson Island, Veteran Isles and Dorothee Island. While Pearson Isles is the official name, the group is also known in some sources as the ”Pearson Islands”, the “Pearson Group” and the “Pearson Archipelago”.
Pearson Island is located about 63 kilometres (39 miles) south west by west of Cape Finniss and about 25 kilometres (16 miles) south west of Flinders Island. It consists of one land mass with two relatively smaller peaks rising out of the sea in an arc extending to the south east via a spit of rock connected to its most southerly point . The arc encloses a bay and a beach which are sheltered from weather both from the west and the south and which can be respectively used as an anchorage and as a landing point. The three parts of the island are informally referred to in one source respectively as the “north section”, the “middle section” and the “south section”. The island has an area of 213 hectares (530 acres). Its highest point is a feature called “Hill 781” with a height of 238 metres (781 feet) above sea level. “Hill 781” and two other hills, “North Hill” and “East Hill”, which are both of a height greater than 200 metres (660 feet) are located on the “north section” while the highest point on the remainder of the island is “South Hill” on the “south section”with a height of 115 metres (377 feet).
Veteran Isles is a pair of peaks located about 1 kilometre (0.62 miles) south of Pearson Island and about 0.5 kilometres (0.31 miles) apart. The northern island rises to a height of 82 metres (269 feet) above sea level while the south island reaches a height of 25–26 metres (82–85 feet). One source reports a combined area of 14 hectares (35 acres) for both islands. The northern island “retains pockets of granitic soil’ that supports a shrubland on its upper levels while southern island is bare of soil and therefore vegetation due to wave action. As 1996, access via boat was suggested as being “hazardous” due to the combination of a steep shoreline and sea conditions that need to be calm.
Dorothee Island which is located about 4 kilometres (2.5 miles) south of Pearson Island has an area of about 56 hectares (140 acres). The island has undergone extensive erosion with the result that a large crevasse bisects the island in the east-west direction, forming a pair of peaks. The north side reaches a height of 140 metres (460 feet) while the south side reaches a height of 102 metres (335 feet). The top of both peaks each “retains some pockets of soil, predominantly coarse and granitic but with small patches of calcareous sandy loam”. The island’s east coast is reported in 1996 as providing “enough shelter to allow a cautious landing in all but severe swells”.
The Pearson Isles were formed about 10,500 years ago following the rise of sea levels at the start of the Holocene. The four members of the Pearson Isles are the peaks of an inselberg remaining after its gradual concealment by sea level rise. The inselberg is composed of a basement rock granite belonging to a group of rocks associated with an event known as the Hiltaba Suite (part of the Gawler Range Volcanics), which is a series of volcanic events occurring about 1,590 million years ago within the area now covered in part by the western Eyre Peninsula, the adjacent interior of the Australian continent and the part of the Great Australian Bight immediately adjoining the western coast of Eyre Peninsula. Landforms on each of the islands are dominated firstly by the granite basement rock and its jointing, and secondly by rock and erosive processes associated with the marine environment. The former class of landforms include “massive curvilinear sheets” on the lower level of the islands and boulders “derived from the breakdown of the sheets” on the upper levels of the islands. The second class of landforms included “remnants of aeolianite-old coastal foredune deposits” associated with a time when the sea level was lowered.
The waters around the Pearson Isles fall to water depths greater than 50 metres (160 feet) within 500 metres (1,600 feet) from the coastline of Pearson Island and to the south and west sides of Dorothee Island.
Flinders discovered and named the island group on Saturday, 13 February 1802. On the same day, Flinders also nominated it as one of the constituent parts of the Investigator Group. Flinders described the island group as follows:
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Pearson Isles
Pearson Isles (also called the Pearson Islands, Pearson Group and Pearson Archipelago) is an island group located in the Australian state of South Australia about 65 kilometres (40 miles) to 72 kilometres (45 miles) west south-west of Cape Finniss on the west coast of Eyre Peninsula within the larger island group, the Investigator Group. The group was discovered and named by Matthew Flinders on 13 February 1802. The group has four members - Pearson Island, a pair of islands known as the Veteran Isles and Dorothee Island. The island group has enjoyed protected area status starting in 1916 and since 2011, it has been part of the Investigator Group Wilderness Protection Area. The island group is notable as a venue for scientific research.
Pearson Isles is an island group located in waters from between 65 kilometres (40 miles) to 72 kilometres (45 miles) west south-west of Cape Finniss on the west coast of Eyre Peninsula in South Australia. The group consists of the following islands in order of increasing distance from the Australian continental coastline - Pearson Island, Veteran Isles and Dorothee Island. While Pearson Isles is the official name, the group is also known in some sources as the ”Pearson Islands”, the “Pearson Group” and the “Pearson Archipelago”.
Pearson Island is located about 63 kilometres (39 miles) south west by west of Cape Finniss and about 25 kilometres (16 miles) south west of Flinders Island. It consists of one land mass with two relatively smaller peaks rising out of the sea in an arc extending to the south east via a spit of rock connected to its most southerly point . The arc encloses a bay and a beach which are sheltered from weather both from the west and the south and which can be respectively used as an anchorage and as a landing point. The three parts of the island are informally referred to in one source respectively as the “north section”, the “middle section” and the “south section”. The island has an area of 213 hectares (530 acres). Its highest point is a feature called “Hill 781” with a height of 238 metres (781 feet) above sea level. “Hill 781” and two other hills, “North Hill” and “East Hill”, which are both of a height greater than 200 metres (660 feet) are located on the “north section” while the highest point on the remainder of the island is “South Hill” on the “south section”with a height of 115 metres (377 feet).
Veteran Isles is a pair of peaks located about 1 kilometre (0.62 miles) south of Pearson Island and about 0.5 kilometres (0.31 miles) apart. The northern island rises to a height of 82 metres (269 feet) above sea level while the south island reaches a height of 25–26 metres (82–85 feet). One source reports a combined area of 14 hectares (35 acres) for both islands. The northern island “retains pockets of granitic soil’ that supports a shrubland on its upper levels while southern island is bare of soil and therefore vegetation due to wave action. As 1996, access via boat was suggested as being “hazardous” due to the combination of a steep shoreline and sea conditions that need to be calm.
Dorothee Island which is located about 4 kilometres (2.5 miles) south of Pearson Island has an area of about 56 hectares (140 acres). The island has undergone extensive erosion with the result that a large crevasse bisects the island in the east-west direction, forming a pair of peaks. The north side reaches a height of 140 metres (460 feet) while the south side reaches a height of 102 metres (335 feet). The top of both peaks each “retains some pockets of soil, predominantly coarse and granitic but with small patches of calcareous sandy loam”. The island’s east coast is reported in 1996 as providing “enough shelter to allow a cautious landing in all but severe swells”.
The Pearson Isles were formed about 10,500 years ago following the rise of sea levels at the start of the Holocene. The four members of the Pearson Isles are the peaks of an inselberg remaining after its gradual concealment by sea level rise. The inselberg is composed of a basement rock granite belonging to a group of rocks associated with an event known as the Hiltaba Suite (part of the Gawler Range Volcanics), which is a series of volcanic events occurring about 1,590 million years ago within the area now covered in part by the western Eyre Peninsula, the adjacent interior of the Australian continent and the part of the Great Australian Bight immediately adjoining the western coast of Eyre Peninsula. Landforms on each of the islands are dominated firstly by the granite basement rock and its jointing, and secondly by rock and erosive processes associated with the marine environment. The former class of landforms include “massive curvilinear sheets” on the lower level of the islands and boulders “derived from the breakdown of the sheets” on the upper levels of the islands. The second class of landforms included “remnants of aeolianite-old coastal foredune deposits” associated with a time when the sea level was lowered.
The waters around the Pearson Isles fall to water depths greater than 50 metres (160 feet) within 500 metres (1,600 feet) from the coastline of Pearson Island and to the south and west sides of Dorothee Island.
Flinders discovered and named the island group on Saturday, 13 February 1802. On the same day, Flinders also nominated it as one of the constituent parts of the Investigator Group. Flinders described the island group as follows: