Night Sky 5d3 - WellAdjustedCoyote

Cratered highlands (and spiked lowlands)

"Highlands - The oldest exposed areas on the surface of the Moon. Highlands are extensively cratered and differ chemically from the maria.The densely cratered portions of the Moon that are typically at higher elevations than the mare plains. The highlands contain a significant proportion of anorthosite, an igneous rock made up almost entirely of plagioclase feldspar." from "Apollo Lunar Module - Glossary"