Herbert Raab: Ries and Steinheim craters
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Steinheim crater (diameter 2.5 km) was formed at the same time as Ries crater.

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Ries crater (diameter 25 km) is one of the youngest of the large impact structures on the Earth.

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This type of impact breccia, found at Ries crater,  is called Suevite and it resembles the regolith that covers lunar surface.

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These tectics were ejected from the Ries crater and they were found in the southern part of Czech Republic. They are also called “moldaviates” for the Moldau river in Bohemia.

Summary: Fifteen million years ago, there was an impact in Bavaria, Germany. The results are the big crater Ries (diameter 25 km, depth 240 m, it has two rings) and the smaller Steinheim (diameter 2.5 km, depth 100 m, it has a ring and a central peak). The impact influenced only life in the local region, destroying it, but some ejecta was found 250 kilometers away in the Czech Republic. Today, the city of  Noerdlingen lies in the Ries crater and the Noerdlingen church is made from impact rock (the biggest of its kind in the world).

Links.                                                                                                                                           http://btpdx1.phy.unibayrenth.de/solar/crater.html                                                                http://www.cotf.edu/ETE/scen/MSESE/dinosaurflr/box1.html                                                                    http://www-dial.jpl.nasa.gov/kidsat/exploration/Exploration-TEAM/Norman_Hung/                    Craters/Craters/Craters.html

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