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Geology Photo page
Under the waving yellow crops on this photo at Cap Blanc Nez up to 133 meters of fossil-rich Cretaceous sediments (Turonian / Cenomanian) are hidden beneath the surface. Microscopic algae (coccoliths) formed a hundreds of meters thick layer of lime, in a shallow and relatively warm sea, about 70 million years ago. The lime was later converted into limestone. In the Oligocene, the area was uplifted and erosion began to occur. The hard sandstone from the Jurassic (Cap Gris Nez) primarily offered much resistance. Therefore it is still visible in the landscape. Due to the rise in sea level (after the melting of the ice sheet) and river erosion there was finally an open connection between the North Sea and ocean. At the beach waves constantly erodes the rocks and a coastal cliff was formed. The English Channel widens annually by about 130 centimeters.
Photographed in: Cap Blanc Nez, France
Date: mei 2007
By Tom Koops (Spongebob)
Fossiel.net number: 2080-0001
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