Glinka is a pit-floored crater on Mercury, which was discovered in 1974 by ''

Mariner 10 ''Mariner 10'' was an American Robotic spacecraft, robotic space probe launched by NASA on 3 November 1973, to fly by the planets Mercury (planet), Mercury and Venus. It was the first spacecraft to perform flybys of multiple planets. ''Marin ...

'' spacecraft. It was named by the

IAU The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...

in 2008, after Russian composer

Mikhail Glinka Mikhail Ivanovich Glinka ( rus, links=no, Михаил Иванович Глинка, Mikhail Ivanovich Glinka, mʲɪxɐˈil ɨˈvanəvʲɪdʑ ˈɡlʲinkə, Ru-Mikhail-Ivanovich-Glinka.ogg; ) was the first Russian composer to gain wide recognit ...

. Its floor is covered by the smooth plain material and displays a kidney-shaped collapse feature, which is also called a central pit. The size of the pit, which was first noticed in ''

MESSENGER Messenger, Messengers, The Messenger or The Messengers may refer to: People * Courier, a person or company that delivers messages, packages, or mail * Messenger (surname) * Bicycle messenger, a bicyclist who transports packages through cities * M ...

'' images obtained in January 2008, is . It is surrounded by a bright

pyroclastic Pyroclast, Pyroclastic or Pyroclastics may refer to: Geology * Pyroclast, or airborne volcanic tephra fragments * Pyroclastic rock, rock fragments produced and ejected by explosive volcanic eruptions * Pyroclastic cone, landform of ejecta fro ...

deposit. Such a feature may have resulted from collapse of a

magma chamber A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it u ...

underlying the central part of the crater. The collapse feature is an analog of Earth's volcanic

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the str ...

s. File:Glinka crater EW1006407109G.jpg, Glinka crater File:Glinka crater EN0262402263M.map.jpg, Closeup of the central pit

References

Impact craters on Mercury Mikhail Glinka {{Mercury-planet-stub