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Géologie de la Belgique

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CRÉTACÉ INFÉRIEUR (FSM) Italie Centrale<br />

joints <strong>de</strong><br />

stratification<br />

25 25 Ma Ma<br />

PREAT A ULB - Conférence Bouillon 7.12.2007<br />

4%<br />

Préat 2002<br />

±<br />

100 ans<br />

± 30 cm<br />

1000 ans<br />

LOFERITES (tidal f<strong>la</strong>ts)<br />

0,3-3 mm/an<br />

cyanobactéries<br />

0.3 mm ===> 300 m/Ma<br />

soit 1Ma/25Ma = 4%<br />

[ou 0,4% si 3 mm]

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