Unknown
Found in the Austin Chalk formation in Grayson Co. Texas.
Upper cretaceous period
Photo Information
- Taken with NIKON COOLPIX P510
- Focal Length 4.9 mm
- Exposure Time 10/300
- f Aperture f/3.1
- ISO Speed 400
By galaxy777
Found in the Austin Chalk formation in Grayson Co. Texas.
Upper cretaceous period
Recommended Comments