File:Silica pseudomorph after gypsum crystals and silicified serpulid polychaete tubes.jpg

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Summary

Description
English: On the edges of the Tethys during the Lower Cretaceous the Urgonian carbonate platform has undergone significant variations in sea level.

During periods of low sea level, sub aerial exposure areas appeared and in very shallow bodies of water, the salts precipitated. This sample comes from one of these very shallow bodies of water. Crystals are silica pseudomorph after gypsum. Fossils are silicified serpulid (Polychaeta) tubes.

Stage : Aptian, Lower Cretaceous

Locality : Provence, South-East France
Français : Sur les bords de la Téthys durant le Crétacé Inférieur la plateforme carbonatée urgonienne a subit d'importantes variations du niveau marin.

Durant les périodes de bas niveau marin sont apparus des zones émergées et dans les étendues d'eau très peu profonde, les sels ont précipité. Cet échantillon provient de l'une de ces étendue d'eau très peu profonde. Les cristaux sont des pseudomorphoses : silice après gypse. Les fossiles sont des tubes de serpules (Polychaeta) silicifiés.

Etage : Aptien, Crétacé Inférieur

Localité : Provence, sud est de la France
English: Silica pseudomorph after gypsum crystals and silicified serpulid polychaete tubes
Date
Source Own work
Author Benoit Potin

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Silica pseudomorph after gypsum crystals and silicified serpulid tubes

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5 December 2023

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Date/TimeThumbnailDimensionsUserComment
current11:06, 10 December 2023Thumbnail for version as of 11:06, 10 December 20234,288 × 3,216 (4.93 MB)Benoit PotinUploaded own work with UploadWizard
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