Older, blue-gray impact breccia unit. Sample of blue-gray impact breccia. Sample of anothosite fragment from blue-gray unit. Younger, vesicular impact breccia unit. Sample of vesicular impact breccia.
Injection veins of glassy impact breccia in breccia.
The Apollo Model Originally published by the author in American Mineralogist, v 76, 773-784. Contrast with the Earth. Number 92-03, 79p. A Lunar Perspective, Lunar and Planetary Institute, Houston, 481p.