Three Sisters Cones

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Three Sisters Cones ( 77°34′S166°58′E / 77.567°S 166.967°E / -77.567; 166.967 Coordinates: 77°34′S166°58′E / 77.567°S 166.967°E / -77.567; 166.967 ) is a three aligned cones at an elevation of about 1,800 m on the southwest slopes of Mount Erebus on Ross Island. Named by members of the British Antarctic Expedition, 1910–13, under Scott.

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.

Mount Erebus volcano on Ross Island, Antarctica

Mount Erebus is the second-highest volcano in Antarctica and the southernmost active volcano on Earth. It is the sixth-highest ultra mountain on the continent. With a summit elevation of 3,794 metres (12,448 ft), it is located in the Ross Dependency on Ross Island, which is also home to three inactive volcanoes: Mount Terror, Mount Bird, and Mount Terra Nova.

Ross Island island formed by four volcanoes in the Ross Sea near the continent of Antarctica

Ross Island is an island formed by four volcanoes in the Ross Sea near the continent of Antarctica, off the coast of Victoria Land in McMurdo Sound. Ross Island lies within the boundaries of Ross Dependency, an area of Antarctica claimed by New Zealand.

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


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