Pseudotachylite: Facts, Discussion Forum, and Encyclopedia Article

Pseudotachylite

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	Pseudotachylite
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	Topics Pseudotachylite Topic Home Pseudotachylite is a fault rockGeologic fault Geologic faults or simply faults are planar rock fractures, which show evidence of relative movement.... that has the appearance of the basaltic glassGlass Glass is a uniform amorphous solid material, usually produced when the viscous molten material cools very rapidly to below i... , tachylyteTachylyte Summary Tachylyte is a vitreous form of basaltic obsidian.... . It is generally found either along fault surfaces, often as the matrixMatrix (geology) The matrix or groundmass of rock is the fine-grained mass of material in which larger grains or crystals are embedded.... to a brecciaBreccia *Breccia, the Italian word for 'breach', is typically a rock composed of angular fragments from a previous rock structure... , or as veinsVein (geology) In geology, a vein* is a finite volume within a rock, having a distinct shape, filled with crystals of one or more minerals, ... injected into the walls of the fault. In most cases there is good evidence that the pseudotachylite formed by frictional melting of the wall rocks during rapid fault movement associated with a seismic event. This has caused them to be termed "fossil earthquakes". External links

Pseudotachylite