Hudspeth Formation
| Hudspeth Formation | |
|---|---|
| Stratigraphic range: Albian ~ | |
| Type | Geological formation |
| Unit of | Mitchell Group |
| Area | Wheeler & Lake Counties, Oregon |
| Lithology | |
| Primary | Mudstone, shale |
| Location | |
| Coordinates | 43°18′N 120°06′W / 43.3°N 120.1°W |
| Approximate paleocoordinates | 42°54′N 74°48′E / 42.9°N 74.8°E |
| Region | Pacific Northwest Oregon |
| Country |  United States |
  Hudspeth Formation (the United States)  Hudspeth Formation (Oregon) | |
The Hudspeth Formation is a Cretaceous sedimentary rock formation, found in Oregon of the United States of America. The formation dates to the Albian age of the Early Cretaceous period. During the Albian much of this formation was submerged beneath shallow seas resulting in the preservation of many marine fossils. Pterosaur, dinosaur and marine fossils have been recovered from the formation. It is intertongued with the Gable Creek Formation.[1]
Fossil content
Vertebrates
| Vertebrates of the Hudspeth Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Bennettazhia[2] | B. oregonensis | Oregon | Humerus, two fused dorsal vertebrae, and a partial joint bone | A Tapejaromorpha pterosaur |  | |
| Ornithopoda | Indeterminate | Oregon | Toe bone | First and only dinosaur from Oregon, likely a bloated carcass swept out into the ocean[3] | ||
| Plesiosauroidea | Indeterminate | Oregon | A partial skull | A short necked Plesiosauroidea[4] | ||
| Ichthyosauria | Indeterminate | Vertebral centra | ||||
| Scapanorhynchus sp.[5] | A shark | |||||
Ammonites
| Ammonites of the Hudspeth Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Brewericeras | B. hulenensis | Oregon | Shell in siderite nodules | |||
| B. breweri | Oregon | |||||
| Leconteites | L. lecontei | Oregon | Shell | |||
| Desmoceras | D. alamoense | Oregon | Siderite nodule and shells[6] | Desmoceras is one of the most common Ammonite Genuses to be found in the Hudspeth Formation |  | |
| Anisoceras | Indeterminate | Oregon | ||||
| A. merriami | Oregon | Coiled shell | ||||
| Mariella | M. oregonensis | Oregon | Siderite nodule | |||
| Anagaudryceras | Indeterminate | Oregon | Siderite nodule | |||
| Pseudohelicoceras | P. petersoni | Oregon | ||||
| Mortoniceras | M. inflatum | Oregon |  | |||
| M. fallax | Oregon | |||||
Other invertebrates
| Other invertebrates of the Hudspeth Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Pleuromya | P. russelli | Oregon | ||||
| Buchia | Indeterminate | Oregon | ||||
| Epiaster | E. californicus | Oregon | ||||
| Trigonarca | T. jacksonensis | Oregon | ||||
| Goniomya | G. vespera | Oregon | ||||
| Sogdianella | S. oregonensis | Oregon | ||||
| Euspira | E. conradiana | Oregon | Euspira is still extant around the world though E. conradiana is extinct |  | ||
| Eucorystes | E. platys | Oregon | A type of small crab, also present in Europe | |||
See also
References
- ^ "Bedrock geology of the Mitchell Quadrangle, Wheeler County, Oregin" (PDF). 1971. Retrieved 2020-07-04.
{{cite web}}: CS1 maint: url-status (link) - ^ Gilmore, 1928
- ^ Retallack et al., 2018
- ^ Fremd et al., 2005
- ^ Welton, 1972
- ^ "Condon Collection's Searchable Database". Retrieved July 4, 2020.
{{cite web}}: CS1 maint: url-status (link)
Bibliography
- Template:Cite LSA
- Fremd, Ted; Retallack, Gregory; Springer, Dale; Scotchmoor, Judy (2005). "The Paleontology Portal: Oregon, U.S." paleoportal.org. Retrieved 2020-07-04.
{{cite web}}: CS1 maint: url-status (link) - Template:Cite LSA
- Template:Cite LSA