Why this rock is probably not a meteorite:

The person who sent the photo of no. 73 also sent this photo, suspecting that it was of a lunar meteorite regolith breccia. It's probably not. Notice that there are several rounded clasts, including the biggest clast just above the center on the left edge. Lunar meteorites don't have round clasts (no wind or water on the Moon). See, e.g., Dhofar 081. Also, there's one very red clast in the upper right. There aren't any red rock types on the Moon because there is no oxidized iron (Fe3+).

In lunar meteorite regolith breccias, the matrix is as hard as the clasts, thus the clasts never stand out in positive (or negative) relief on a broken surface, as on this rock.
What is it?

A terrestrial conglomerate. Many of the clasts look like chert.


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.