Pseudotachylite is a fault rock that has the appearance of the basaltic glass, tachylyte. In Geology a fault, or fault line, is a planar rock fracture which shows evidence of relative movement Basalt (bəˈsɔːlt ˈbeisɔːlt ˈbæsɔːlt is a common Extrusive Volcanic rock. Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many Tachylite (also spelled tachylyte is a Vitreous form of Basaltic Volcanic glass. It is generally found either along fault surfaces, often as the matrix to a breccia, or as veins injected into the walls of the fault. The matrix or groundmass of rock is the fine-grained mass of material in which larger grains or Crystals are embedded Breccia (ˈbrɛtʃiə ˈbrɛʃiə breach is a rock composed of angular fragments of several Minerals or rocks in a matrix, that is a cementing material In Geology, a vein is a finite volume within a rock, having a distinct shape filled with Crystals of one or more Minerals which were precipitated 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. Seismology (from Greek grc σεισμός seismos, "earthquake" and grc -λογία -logia) is the scientific study of Earthquakes This has caused them to be termed "fossil earthquakes". An earthquake is the result of a sudden release of energy in the Earth 's crust that creates Seismic waves Earthquakes are recorded with a Seismometer
References
- Sibson, R. H. , 1975. Generation of pseudotachylite by ancient seismic faulting. Geophysical Journal of the Royal Astronomical Society 43, 775– 794.
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