Lockyer (Mars)

Named after Joseph N. Lockyer - British astronomer (1836-1920).

Lockyer is fairly easy to spot on Mars maps because it sits in the young northern hemisphere, where there are few craters. It is close to Elysium Mons and Hecates Tholus, two large volcanoes. Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On Mars large craters are named after deceased scientists, writers and others who have contributed to the lore of Mars. Small creaters (less than 60km) are named after small towns and villages.