A volcanic or igneous breccia forms during eruptive activities.
In some breccia zones the rock fragments exhibit partial melting and reaction rims.
It weights 751 grams and consists of breccia - sintered fragments of various minerals from lunar continents.
copious quantities of breccia
Fluids involved in brecciation were most likely formation waters expelled from the cherts and basalts.
Breccias are associated with mechanical weathering in regions of high tectonic activity.
It is composed of a silicified core and flanked by more friable sulfides showing evidence of later tectonic brecciation .
The brecciation is probably a result of removal of evaporites from the underlying Moose River Formation.
The explosive expansion brecciates and mixes the magmatic and sedimentary material.
In the impact point the target rock and the projectile will vaporize, melt and brecciate .