SURFACE EXPOSURES
Three exposures of fractured limestone just outside crater rim
breccia
boulder of explosive breccia
Photomicrographs
breccia
meltrock
meltrock
UMBRELLA TEXTURE
Boulders with rounded top
upside down of "umbrella" texture with
white clay in concave cavity
Another boulder with rounded top and concave directly underneath
"Expulsion cavities" in dolomite: probably formed by carbon dioxide
gas exploding like a missile inside the rock
probable shatter cones in dolomite
Definite shatter cones in dolomite
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