Astronomy:Lockyer (Martian crater)
Location of Lockyer Crater
Lockyer is a crater in the Elysium quadrangle of Mars. It was named after Norman Lockyer, a British astronomer (1836-1920). Lockyer is surrounded by relatively smooth plains, where there are few craters. It is east of Elysium Mons and Hecates Tholus, two large volcanoes. It is south of the larger crater Adams and the Phlegra Montes.
Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact.
Mosaic of Viking Orbiter 1 images
Lockyer, as seen by CTX camera on MRO
Layers in Lockyer, as seen by HiRISE under the HiWish program.
Original source: https://en.wikipedia.org/wiki/ Lockyer (Martian crater). Read more