Shock metamorphic effects in lunar microcraters

Abstract

This study characterizes shock metamorphic effects preserved in concentric zones underlying six glass-lined lunar microcraters, 0.4-4.4 mm in diameter. Petrographic observations and microprobe analyses were carried out on unshocked, shocked, and melted zones within microcraters on surfaces of the following rocks: anorthosite, 62255; anorthositic norite, 14314; mare basalt, 10085; and polymict breccia, 61175.