The John Day Fossil Beds
RFID:Image ID:GCT95K
Image details
Contributor:
Eric Middelkoop / Alamy Stock PhotoImage ID:
GCT95KFile size:
103.3 MB (6.9 MB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
7356 x 4908 px | 62.3 x 41.6 cm | 24.5 x 16.4 inches | 300dpiDate taken:
4 March 2016Location:
OregonMore information:
The John Day Basin is a fossil record that spans over 40 million years. The predominant exposures of green rock seen on Sheep Rock are a multitude of reworked layers of volcanic ash. The rich green color of the claystone was caused by chemical weathering of a mineral called celadonite. This happened millions of years ago as water moved through the alkaline ash beds under high pressure.