Earthwatcher

Earthwatcher deceased

Posted: 05 Jan 2016


Taken: 16 Jun 2015

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1/80 f/8.0 15.0 mm ISO 200

Canon EOS 600D

EF-S15-85mm f/3.5-5.6 IS USM


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Keywords

Ries
Ries Crater Geopark
Malm
suevite
Bavaria
Bayern
Germany
Deutschland
geology
rcoks
limestone
Altenbürg


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Altenbürg quarry panorama

Altenbürg quarry panorama
Ries Meteorite Crater Geopark.

General view of the Altenbürg quarry located on the southwest crater rim. Suevite (pale buff) is in near vertical contact with disturbed Jurassic limestones (Malm - light grey).

Suevite is formed from the fallout of the partially melted and vaporised ejecta debris shot high into the atmosphere as a result of the meteorite impact when temperatures and pressures almost instantaneously reached 20,000°C and several million bar.

This quarry was crucial in the development of the correct understanding and interpretation of the Ries crater. The identification of coesite, stishovite (high temperature and pressure varieties of quartz) and diamond in the suevite enabled the latter to be identified as a meteorite impact ejecta blanket rather than of volcanic origin.

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