Why this rock is probably not a meteorite:

This one is interesting. Even in thin section this rock resembles some lunar regolith breccias. For example, the clasts are angular, not rounded, and some are rich in plagioclase. Some of the small clasts have rims, however, and that feature is rare in lunar rocks. Also, some of the clasts are reddish, and there are no red rocks on the Moon. (Some lunar meteorites from the desert are stained with hematite, however). Also, of course, there is no fusion crust.
What is it?

This is probably a volcaniclastic rock. Such rocks consist fragments of volcanic rocks cemented together.


Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.