View Sizes
View Details
- Aperture Value: F8
- Date/Time Original: 10/24/2004 11:54:54 AM
- Exposure Time: 165/50000 sec
- Flash: Flash did not fire, auto
- Focal Length: 7.6 mm
- Model: HP PhotoSmart C945 (V01.46)
More
Chert gravel in the creek mostly was deposited during major storms or floods. Here, you can see the creek is channelized so that it acts as a storm sewer. Just a few inches below the gravel is the limestone bedrock that underlies much of the Springfield Plateau.