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USGS 3832-CO - Hillard Limestone, Southeast Fairbanks Census Area, Alaska, USA
| Lat/Long (Decimal) | 64.95,-141.2 |
|---|---|
| Co-ordinates Derivation | stated in text |
| Given Location | Alaska, United States |
| Mindat.org Region (for given coordinates) | Southeast Fairbanks Census Area, Alaska, USA |
Collections
| Collection | Reference | Stratigraphic Name | Comments | Lithology | Age |
|---|---|---|---|---|---|
| USGS 3717-CO - Hillard Limestone, Yukon River (west ridge) area | Palmer A.R. (1968) | Hillard Limestone | STRATIGRAPHIC RELATIONS: From Hillard Limestone, which regionally overlies the Early Cambrian Adams Argillite and is unconformably overlain by the lower part of the Rhoad River Formation. AGE: Dresbachian on occurence of faunal assemblages similar to that of the Dunderbergia zone of the Great Basin. STRATIGRAPHIC POSITION: At base of 50 ft section, bed of limestone at top of a unit of black siltstone that seems to be locally developed. | "limestone" | 501 - 485.4 Ma Cambrian |
| USGS 3832-CO - Hillard Limestone, Yukon River (west ridge) area | Palmer A.R. (1968) | Hillard Limestone | STRATIGRAPHIC RELATIONS: From Hillard Limestone, which regionally overlies the Early Cambrian Adams Argillite and is unconformably overlain by the lower part of the Rhoad River Formation. AGE: upper Middle Cambrian based on stratigraphically adjacent occurrence of Lejopyge. STRATIGRAPHIC POSITION: Upper exposures of limestone. | "limestone" | 513 - 501 Ma Cambrian |
Recorded Fossils
| Accepted Name | Hierarchy | Age |
|---|---|---|
 Trilobitaclass | Animalia : Arthropoda : Trilobita | 513 - 501 Ma Cambrian |
| Pseudagnostus sp. genus | Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : Pseudagnostus | 501 - 485.4 Ma Cambrian |
| Lejopyge laevigatus species | Animalia : Arthropoda : Trilobita : Agnostida : Ptychagnostidae : Lejopyge : Lejopyge laevigatus | 513 - 501 Ma Cambrian |
| Corynexochus plumula species | Animalia : Arthropoda : Trilobita : Corynexochida : Corynexochidae : Corynexochus : Corynexochus plumula | 501 - 485.4 Ma Cambrian |
| Olenaspella sp. genus | Animalia : Arthropoda : Trilobita : Asaphida : Aphelaspididae : Olenaspella | 501 - 485.4 Ma Cambrian |
References
| Palmer A.R. (1968) Cambrian trilobites of East-Central Alaska, United States Geological Survey Professional Paper 559 B |
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
