Dalle à ammonites
French fossil site / From Wikipedia, the free encyclopedia
The Dalle à ammonites (or Dalle aux ammonites) at Digne-les-Bains (Alpes-de-Haute-Provence) is a remarkable natural site consisting of a rock strata bearing a large number of fossilized ammonites. This site is located approximately 1.5 kilometres (0.93 mi) south of Digne-les-Bains from Barles road. It is part of the Géologique de Haute-Provence National Nature Reserve.
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Dalle à ammonites | |
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Stratigraphic range: Sinemurian | |
Dalle à ammonites in Digne-les-Bains | |
Type | Fossil site |
Thickness | 20 cm |
Lithology | |
Primary | Grey limestone |
Location | |
Coordinates | 44°7′10″N 6°14′3″E |
Region | ![]() |
Country | France |
Type section | |
Named for | Ammonite |
The slab, inclined at 60°, is made of grey limestone. It bears around 1,500 ammonites, 90% of which belonging to the species Coroniceras multicostatum, dating from the Sinemurian (Early Jurassic). Those ammonites can attain a diameter of 70 centimetres (28 in).
Nautiloids, belemnites, Pecten seashells and other bivalves can also be found in the deposit.
The deposit thickness is estimated to be 20 centimetres (7.9 in), deposited over a 100,000-year period.[1]