Category:Hell Creek Formation
From Wikimedia Commons, the free media repository
English: The Hell Creek Formation is a division of Upper Cretaceous to lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The Hell Creek Formation occurs in Montana and portions of North Dakota, South Dakota, and Wyoming.It is a series of fresh and brackish-water clays, mudstones, and sandstones deposited during the Maastrichtian, the last part of the Cretaceous period. The iridium-enriched K-T boundary, which separates the Cretaceous from the Cenozoic, occurs as a discontinuous but distinct thin marker bedding within the Formation, near its uppermost strata.
This category has the following 10 subcategories, out of 10 total.
- ► Dakotaraptor (1 C, 7 F)
- ► Fossils of the Hell Creek Formation (1 F)
- ► Nanotyrannus (1 C, 12 F)
- ► Pachycephalosaurus (2 C, 1 P, 2 F)
- ► Stygimoloch (1 C, 2 F)
Media in category "Hell Creek Formation"
The following 27 files are in this category, out of 27 total.
- Anzu wyliei localities.png 593 KB
- Bird at Hell Creek.JPG 112 KB
- Hell Creek State Park.jpg 256 KB
- Hell Creek.jpg 307 KB
- Jordan, Montana.jpg 182 KB
- Montana Badlands.jpg 195 KB
- MOR555 skeletal material.JPG 586 KB
- Nanotyrannus Clean.png 534 KB
- Struthiomimus isolated.png 1.41 MB
- T. rex Big Mike.jpg 266 KB