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Apollo Regolith Breccias

Here are some photos of regolith breccias from the Apollo collection. All have been digitally stretched to show the features better. Click on image for enlargement.

Apollo 15 sample 15565,3

Sample 15565 was collected at station 9a, a location at the edge of Hadley Rille where the soil consists mainly of mare basalt. However, the sample is a regolith breccia consisting mostly of nonmare material, but with some mare basalt. The large clasts in the photos are KREEP or mare basalts. The composition of the matrix does correspond to that of any Apollo 15 soil in that it is KREEPier (Sm = 19 ppm, compared to 12 ppm at station 6). The actual color is a medium gray.

The sample consists of three pieces. The mass depicted here is 126 g.

The largest piece is about 5 cm in longest dimension.

Smallest piece, ~2 cm.

Medium-sized piece, 13 cm.

 

 

Apollo 16 samples

In these Apollo 16 regolith breccias, the dark clasts are usually KREEPy impact-melt breccias and the light clasts are anorthosites, usually brecciated. There are no mare basalts clasts.

Apollo 16 sample 66035 (2 cm long).

Apollo 16 sample 66055 (1.5 cm long).

This is the sawn face of Apollo 16 sample 66075 (2.5 cm long).

Apollo 16 sample 66075 (same image, no stretching).

 

A sawn face of sample 60016, about 15 cm wide. This sample is very friable; it could be broken by hand. It would never survive as a meteorite. The clasts are harder than the matrix.

 

 

Back to Some Meteorite Information


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.


e-mailkorotev@wustl.edu

Last revised: 05-October-2015