Leskov Island is a small uninhabited island in the Traversay Islands

Traversay Islands

The Traversay Islands are a group of three islands – Zavodovski, Leskov and Visokoi – at the northern end of the South Sandwich Islands....

 group of the South Sandwich Islands

South Georgia and the South Sandwich Islands

South Georgia and the South Sandwich Islands is a British overseas territory and overseas territory of the European Union in the southern Atlantic Ocean. It is a remote and inhospitable collection of islands, consisting of South Georgia and a chain of smaller islands, known as the South Sandwich...

. It is less than 1.5 kilometre (0.93205910497471 mi) long, and lies 48 km (29.8 mi) west of Visokoi Island

Visokoi Island

Visokoi Island is an uninhabited island in the Traversay Islands group of the South Sandwich Islands. It was discovered in 1819 by a Russian expedition under Fabian Gottlieb von Bellingshausen, who named the island Visokoi because of its conspicuous height.The island is long and wide, capped by...

. It was discovered in 1819 by a Russian expedition under Bellingshausen

Fabian Gottlieb von Bellingshausen

Fabian Gottlieb Thaddeus von Bellingshausen was an officer in the Imperial Russian Navy, cartographer and explorer, who ultimately rose to the rank of Admiral...

, who named it for the third lieutenant on the expedition ship Vostok.

Leskov is located to the west of the main arc

Island arc

An island arc is a type of archipelago composed of a chain of volcanoes which alignment is arc-shaped, and which are situated parallel and close to a boundary between two converging tectonic plates....

 of the South Sandwich Islands, and is composed of andesitic

Andesite

Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite,...

 rather than basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

ic lava

Lava

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...

. The subduction zone forming the South Sandwich Trench

South Sandwich Trench

The South Sandwich Trench is a deep arcuate trench in the South Atlantic Ocean lying 100 km to the east of the South Sandwich Islands. The trench is produced by the subduction of the southernmost portion of the South American Plate beneath the small South Sandwich Plate. The South Sandwich...

lies to the east of the island arc.