Image: Ordovicium-Silurian
Ordovicium-Silurian.jpg (700 × 469 pixels, file size: 357 KB, MIME type: image/jpeg)
Description: Photo of the Ordovician - Silurian boundary, an example of marine transgression as exposed on the Southern tip of the Hovedøya island, Norway. Due to the folding of the caledonian mountain range, the layers have been inverted, leaving Ordovician granular limestone on top of the later Silurian brownish mudstone.
Title: Ordovicium-Silurian
Credit: Own work
Author: Petter Bøckman
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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