ArticlesSpecial Mineral Studies

Petrology of Unshocked Crystalline Rocks and Shock Effects in Lunar Rocks and Minerals

Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 644-647
DOI: 10.1126/science.167.3918.644


On the basis of rock modes, textures, and mineralogy, unshocked crystalline rocks are classified into a dominant ilmenite-rich suite (subdivided into intersertal, ophitic, and hornfels types) and a subordinate feldspar-rich suite (subdivided into poikilitic and granular types). Weakly to moderately shocked rocks show high strain-rate deformation and solid-state transformation of minerals to glasses; intensely shocked rocks are converted to rock glasses. Data on an unknown calcium-bearing iron metasilicate are presented.