Shock metamorphism or impact metamorphism describes the effects of shock-wave related deformation and heating during impact events. The formation of similar features during explosive volcanism is generally discounted due to the lack of metamorphic effects unequivocally associated with explosions … See more Mineral microstructures Planar fractures Planar fractures are parallel sets of multiple planar cracks or cleavages in quartz grains; they develop at the lowest pressures … See more • Impactite • Meteorite shock stage • Suevite See more The effects described above have been found singly, or more often in combination, associated with every impact structure that has been identified on Earth. The search for such effects therefore forms the basis for identifying possible candidate impact … See more • Chapter 4, 'Shock-Metamorphic Effects in Rocks and Minerals' of the online book, French, B.M. 1998. Traces of Catastrophe, A handbook of shock-metamorphic effects in terrestrial meteorite impact structures, Lunar and Planetary Institute 120pp. • Shock metamorphism page. See more WebThese histories are shock metamorphism after the end of thermal metamorphism without annealing (“Cold Shocked”; Bruderheim, Elbert, Leedey ... to see if these results are corroborated by similar methods applied to H5 and H6 chondrites, which are less sensitive to surface impacting than H4 chondrites and are less likely to retain lingering ...
Shock metamorphism of lunar and terrestrial basalts - NASA …
WebGeology Chapter 7 - Metamorphism. ___ is pressure applied equally to all surfaces of a substance as a result of burial or submergence. A. Differential stress. B. Strain. C. … WebThus, regional metamorphism usually results in forming metamorphic rocks that are strongly foliated, such as slates, schists, and gniesses. The differential stress usually … bps in repo rate
Shock Metamorphism Encyclopedia.com
Web30 May 2024 · INTRODUCTION. Plagioclase feldspar is the most abundant rock-forming mineral in the crust of solid planetary bodies, including Earth, and represents up to 70% of the Moon’s crust (e.g., Papike et al. 1991).Despite the abundance of plagioclase, studies of its response to shock metamorphism are limited in comparison to those of quartz or … Web29 Aug 2024 · Definition of progressive stages of shock metamorphism for classification system SE (quartz-rich sand, Tables 3 and 12); pf = planar fractures; pdf = planar deformation features; shock pressure corresponds to the final equilibration peak shock pressure; post-shock temperature is the temperature increase after pressure release … Webthe macroscopic results from modeling and experiments in terms of crater size, ejecta distribution and their place of origin, and the attenuation of shock pressure in the target. Subsequently, we describe the observed stages of shock metamorphism in the ejecta samples and provide data on the distribution of variably shocked quartz bps insertion pau