Lacroix Nunatak

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Lacroix Nunatak ( 66°51′S141°20′E / 66.850°S 141.333°E / -66.850; 141.333 Coordinates: 66°51′S141°20′E / 66.850°S 141.333°E / -66.850; 141.333 ) is a ridge of terminal moraine, about 1 nautical mile (2 km) long and 75 metres (250 ft) high, standing immediately south of a small zone of low rocky ridges which protrude above the ice-covered point 2 nautical miles (4 km) southwest of Cape Margerie, Adélie Coast, Antarctica. It was discovered in 1931 by the British Australian New Zealand Antarctic Research Expedition, and was named by Mawson after French mineralogist Alfred Lacroix. It was photographed from the air by U.S. Navy Operation Highjump, 1946–47, and surveyed by the French Antarctic Expedition, 1949–51, which established an astronomical control station near its center. [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.

Moraine Glacially formed accumulation of unconsolidated debris

A moraine is any glacially formed accumulation of unconsolidated glacial debris that occurs in both currently and formerly glaciated regions on Earth, through geomorphological processes. Moraines are formed from debris previously carried along by a glacier and normally consisting of somewhat rounded particles ranging in size from large boulders to minute glacial flour. Lateral moraines are formed at the side of the ice flow and terminal moraines at the foot, marking the maximum advance of the glacier. Other types of moraine include ground moraines, till-covered areas with irregular topography, and medial moraines which are formed where two glaciers meet.

Cape Margerie is a low, ice-covered cape in Antarctica, marked by prominent rock outcrops at its northern end, lying midway between Cape Mousse and Lacroix Nunatak and bounded on the north by numerous rocky islands. It was charted by the Australasian Antarctic Expedition under Mawson, 1911–14, who named this feature for Emmanuel de Margerie, a French geographer and geologist.

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Davern Nunatak is a nunatak 1.5 nautical miles (3 km) west of Mount Bewsher in the Aramis Range, Prince Charles Mountains. It was plotted from Australian National Antarctic Research Expeditions air photos, and named by the Antarctic Names Committee of Australia for E.V. Davern, a radio operator at Wilkes Station in 1963, and senior weather observer (radio) there in 1967.

The Kyle Nunataks are three nunataks 2.5 nautical miles (5 km) east of Mount Hampson, in the northern part of the Tula Mountains in Enderby Land, Antarctica. They were plotted from air photos taken from Australian National Antarctic Research Expeditions aircraft in 1956, and were named by the Antarctic Names Committee of Australia for J.T. Kyle, a member of the crew of the Discovery during the British Australian New Zealand Antarctic Research Expedition, 1929–31.

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McLean Ridge is a small, partly ice-covered ridge about 3 nautical miles (6 km) southeast of Mount Butterworth in the Aramis Range of the Prince Charles Mountains, Antarctica. It was plotted from Australian National Antarctic Research Expeditions air photos taken in 1956 and 1960, and was named by the Antarctic Names Committee of Australia for C.V. McLean, a senior diesel mechanic at Wilkes Station in 1963.

The Melvold Nunataks are a group of small nunataks located 14 nautical miles (26 km) west of Mount Harding in the Grove Mountains of Antarctica. They were mapped by Australian National Antarctic Research Expeditions from air photos, 1956–60, and were named by the Antarctic Names Committee of Australia for C.D. Melvold, a radio officer at Mawson Station in 1962.

Kilfoyle Nunataks are two nunataks lying 1.5 nautical miles (3 km) southwest of Mount Dowie in the Aramis Range of the Prince Charles Mountains, Antarctica. They were plotted from Australian National Antarctic Research Expeditions air photos, and were named by the Antarctic Names Committee of Australia for B. Kilfoyle, a physicist at Mawson Station in 1966.

References

PD-icon.svg This article incorporates  public domain material from the United States Geological Survey document "Lacroix Nunatak" (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.