Back to Search
Start Over
The Early to Middle Ordovician graptolite faunal succession of the Trail Creek region, central Idaho, U.S.A
- Source :
- Geologica Acta, Vol 3, Iss 4 (2005)
- Publication Year :
- 2005
- Publisher :
- Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB), 2005.
-
Abstract
- The Middle Ordovician graptolite biostratigraphy of the Trail Creek region of Idaho is reviewed and revised. The oldest known fauna belongs to the Didymograptellus bifidus Biozone. The Isograptus victoriae lunatus, I. victoriae maximodivergens, Oncograptus, Undulograptus austrodentatus and Holmograptus lentus Biozones can be differentiated. Pseudophyllograptus archaios (Braithwaite) is found for the first time in the Trail Creek region. This species represents a conspicuous North American mid-continent faunal element and enables the correlation of the endemic P. archaios-C. flexilis Biozone of Utah with the D. bifidus Biozone of the Pacific faunal realm, thus, providing an important tool for the correlation of endemic mid-continent faunas with the pandemic deep water graptolite faunas.
- Subjects :
- North America
Ordovician
Arenig
Graptolites
Biostratigraphy.
Science
Geology
QE1-996.5
Subjects
Details
- Language :
- English
- ISSN :
- 16965728
- Volume :
- 3
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Geologica Acta
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.964ac06e9eb541c4b568f5ecd754d157
- Document Type :
- article
- Full Text :
- https://doi.org/10.1344/105.000001387