[2][3] Astrolabe Island is predominantly volcanic rocks, with coarse grained mafic dolerite making up most of the landing site on the east end.

The steep pyramid peaks, called the Dragons Teeth, may be the vents of an old volcanic complex, probably related to the Shetland subduction zone to the north.

[citation needed] The US Defense Mapping Agency's Sailing Directions for Antarctica (1976) describes Astrolabe Island as follows: Astrolabe Island, about 1,850 feet high, lies about 9 miles from the coast and about 19 miles southwestward of Montravel Rock.

An above-water rock lies approximately 2 miles west-northwest of the northwestern extremity of the island.

A rock, awash, is charted about 8 miles southwestward of the western end of Astrolabe Island.

A 2 kilometres (1.2 mi) wide embayment indenting the west coast of Astrolabe Island for 850 metres (2,790 ft).

A sharp rocky northwest entrance point of Mokren Bight on the west coast of Astrolabe Island.

Named for Frederick W. Sherrell, surveyor and geologist in this area with the Falkland Islands and Dependencies Aerial Survey Expedition (FIDASE), 1955-56.

An ice-covered hill rising to 381 metres (1,250 ft)[12] high in northwestern Astrolabe Island.

Named after Vasil Petleshkov (1845-1876), a leader of the 1876 April Uprising for Bulgarian independence, in connection with the settlement of Petleshkovo in Northeastern Bulgaria.

The ice-covered peak rising to 437 metres (1,434 ft)[14] high on Astrolabe Island in Graham Land.

The name, applied by the UK Antarctic Place-Names Committee (UK-APC), is descriptive of these black tooth-shaped rocks.

Situated 710 metres (2,330 ft) southeast of Kanarata Point and 1.64 kilometres (1.02 mi) northeast of Drumohar Peak.

Named after the ocean fishing trawler Sagita of the Bulgarian company Ocean Fisheries – Burgas that operated in Antarctic waters off South Georgia during its fishing trips under Captain Ivan Krastanov from February 1978 to July 1978, and under Captain Yordan Yordanov from December 1979 to June 1980.

Apart from fishing, on the latter occasion the ship carried out fisheries research by an onboard scientific team.

[21] This article incorporates public domain material from websites or documents of the United States Geological Survey.