Glinka is a pit-floored crater on

Mercury Mercury commonly refers to: * Mercury (planet), the nearest planet to the Sun * Mercury (element), a metallic chemical element with the symbol Hg * Mercury (mythology), a Roman god Mercury or The Mercury may also refer to: Companies * Merc ...

, 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. ''Ma ...

'' spacecraft. It was named by the

IAU The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...

in 2008, after Russian composer

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

. 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'' was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for "Mercury Surface, Space Environment, Geoche ...

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

pyroclastic Pyroclastic rocks (derived from the el, πῦρ, links=no, meaning fire; and , meaning broken) are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroc ...

deposit. Such a feature may have resulted from collapse of a magma chamber 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 volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...

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