Connecting the environment of the ancient past with the natural and cultural history of yesterday and today.



Featured Fossil


This page features a fossil with details about the specimen, its age,

where it was found, and a nugget of interesting information. Not every

specimen will be perfectly preserved - but all are a marvel of the natural world!

All geological time periods are represented.


Allophylus leaf - a warm climate plant found in NW Colorado Eocene shale

Fossil Type:



Allophylus sp.


Green River


Eocene Epoch


Rio Blanco Co., Colorado


Fossils tell us about the environment of ancient ecosystems. The Green River Shale contains an abundance of plants, some like the Sycamore and Sumac are still found in the region. Others, like Allophylus are restricted to subtropical to tropic climates. Anonymous collection. Scale = 2 cm

Date Posted:

November 27, 2015


Archived Featured Fossils

Archived images are now arranged in each category by geological time period.

How to Submit a Featured Fossil

Created April 12, 2012