File:820qtz.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:58, 19 December 2010		399 × 336 (97 KB)	commons>Hike395	{{Information \|Description={{en\|1=Sand-sized quartz grain (0.13 mm) from the USGS-NASA Langley core showing two well-developed, intersecting sets of shock lamellae produced by the late Eocene Chesapeake Bay bolide impact. This shocked quartz grain is from

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