File:Dinolrg.png

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DescriptionDinolrg.png	This chart shows a major decrease in oxygen content in the atmosphere from 35 percent to the present day level of 21 percent. This decrease occured about the same time that the dinosaurs disappeared--65 million years ago.
Source	http://minerals.cr.usgs.gov/gips/na/dinolrg.gif
Author	USGS/USGov.
Permission (Reusing this file)	Free for all use

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

PDMCreative Commons Public Domain Mark 1.0falsefalse

Date/Time	Dimensions	User	Comment
9 February 2007, 12:16:40	614 × 442 (50760 bytes)	Zimbres (talk · contribs)	{{Information \|Description=This chart shows a major decrease in oxygen content in the atmosphere from 35 percent to the present day level of 21 percent. This decrease occured about the same time that the dinosaurs disappeared--65 million years ago. \|Sourc

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	12:47, 4 January 2015		614 × 442 (65 KB)	GifTagger (talk \| contribs)	Bot: Converting file to superior PNG file. (Source: Dinolrg.gif). This GIF was problematic due to non-greyscale color table.

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