Harrisson Ice Rises

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The Harrisson Ice Rises ( 66°27′S96°39′E / 66.450°S 96.650°E / -66.450; 96.650 Coordinates: 66°27′S96°39′E / 66.450°S 96.650°E / -66.450; 96.650 ) are a local swelling of the ice surface 12 nautical miles (22 km) west-southwest of Henderson Island, Antarctica, where the Shackleton Ice Shelf overrides an underlying obstruction. The feature was discovered by the Eastern Sledge Party of the Australasian Antarctic Expedition (1911–14) under Douglas Mawson, who named the feature for Charles T. Harrisson, biologist with the expedition. [1]

Geographic coordinate system Coordinate system

A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.

Henderson Island (Shackleton Ice Shelf) island

Henderson Island is an ice-covered island 17 kilometres (9 nmi) long and rising to 240 m (787 ft), lying 17 kilometres (9 nmi) southeast of Masson Island within the Shackleton Ice Shelf. Henderson Island was discovered in August 1912 by the Western Base Party of the Australian Antarctic Expedition under Sir Douglas Mawson and named by him for Prof. G. C. Henderson of Adelaide, a member of the Australian Antarctic Expedition Advisory Committee.

Shackleton Ice Shelf ice shelf in Antarctica

Shackleton Ice Shelf is an extensive ice shelf fronting the coast of East Antarctica for about 384 km, projecting seaward about 145 km in the western portion and 64 km in the east. It occupies an area of 33,820 km². It is part of Mawson Sea and separates the Queen Mary Coast to the west from the Knox Coast of Wilkes Land to the east. The existence of this ice shelf was first made known by the USEE under Charles Wilkes who mapped a portion of it from the Vincennes in February 1840. It was explored by the Australian Antarctic Expedition under Douglas Mawson (1911–14) who named it for Sir Ernest Shackleton. The extent of the ice shelf was mapped in greater detail in 1955, using aerial photography obtained by US Navy Operation Highjump, 1946-47. Further mapping by the Soviet Expedition of 1956 showed the portion eastward of Scott Glacier to be a part of this ice shelf.

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Cape Lyttelton is a cape forming the southern entrance point of Shackleton Inlet, along the western edge of the Ross Ice Shelf, Antarctica. It was discovered by the British National Antarctic Expedition (1901–04) and named after Lyttelton, New Zealand. The Discovery started on the last lap of its journey south from Lyttelton, where very generous assistance was given the expedition.

Cape Robert is an ice-covered point at the west side of Marret Glacier. It was discovered and named by the French expedition under Captain Jules Dumont d'Urville in 1840. The name Robert is the first name of a member of the family of Dumont d'Urville. The point was roughly charted by the Australasian Antarctic Expedition under Mawson, 1911–14, and more recently delineated from air photos taken by U.S. Navy Operation Highjump, 1946-47.

References

PD-icon.svg This article incorporates  public domain material from the United States Geological Survey document "Harrisson Ice Rises" (content from the Geographic Names Information System ).

United States Geological Survey Scientific agency of the United States government

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility.

Geographic Names Information System geographical database

The Geographic Names Information System (GNIS) is a database that contains name and locative information about more than two million physical and cultural features located throughout the United States of America and its territories. It is a type of gazetteer. GNIS was developed by the United States Geological Survey in cooperation with the United States Board on Geographic Names (BGN) to promote the standardization of feature names.