Description: Precambrian/Cambrian unconformity at the site of the Taum Sauk powerplant. The upper angled layer of grey dolomite is approximately 500 million years old. The reddish rhyolite on which the dolomite rests is approximately 1.5 billion years old. There is a billion years of geologic history missing in this picture.

Source: Photographed by Kbh3rd on May 30, 2005.

License: Licensed for use under your choice of either the Gnu Free Documentation License, version 1.2 or later, or the Creative Commons Attribution license, version 2.0. When used elsewhere, the image may be attributed to "Wikipedian Kbh3rd".

Camera location	37° 31′ 13.39″ N, 90° 50′ 07.35″ W	View this and other nearby images on: OpenStreetMap	37.520385; -90.835374

	This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers.
	You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
	This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

This file is licensed under the Creative Commons Attribution 2.0 Generic license.

You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue