The Dynamic Earth View Multimedia Version

Main Menu >  GeoGallery >  Rocks >  Pseudotachylite
TITLE: GeoGallery

Choose one of the following Rocks for more details:

Pseudotachylite with Granite Fragments

Pseudotachylite with Granite Fragments

This specimen comes from an ancient impact crater at least 300 km (185 mi) across. The black rock, pseudotachylite, formed when friction along fractures melted the rock. The pink and white fragments are the original granite.

bottom navigation bar Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits