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Welcome to the Energy Resources Program Website 'Organic Petrology' Area...

Organic Petrology

Mouse-over the interactive graphic below for Photomicrograph Atlas entrance options:

Photomicrograph Atlas Homepage Interactive Map - Click to View Blue and White Light Comparisons - Click to View ASTM Coal Maceral Classification - Click to View About the Atlas - Click to View OPTIC Coal Maceral Classification - Click to View Organic Material in Shales - Click to View 

Provisional Release

Disclaimer for a Provisional Database: The data you have secured from this USGS database are provisional and subject to revision. The data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.


Page Last Modified: Friday, December 16, 2016