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Sea urchin Dendraster USA F2506
Geology Photo page
The stratification (limestone from the Jurassic period) in the picture shows a clear cyclicity. This regularly thinning and thickening of the layers may be caused by periodic changes in the position of the Earth's axis, such as, for example, the Milankovich cycles. The harder limestone represent a period of shallower sea level than the softer marly layers that reflect a deeper depositional environment.
Photographed in: Provence, France
By Herman Zevenberg (webmaster)
Fossiel.net number: 47-0019
The goal of this Geology Photo page is to present an overview of geological structures from all over the world. Anybody who wants to contribute by improving the information or adding images is welcome to do so! Either contact the Fossiel.net Team or use the Input Form.