JO 71, Volcanopelagic succession, Josephine ophiolite: Early/Lower Bathonian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Protozoa
- Spumellaria
- Pantanelliidae
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Pantanellium sp.
Pessagno 1977
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common category | ||||||
see common names |
Geography
Country: | United States | State/province: | California |
Coordinates: | 41.9° North, 123.8° West (view map) | ||
Paleocoordinates: | 34.2° North, 65.2° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | hand sample |
Time
Period: | Jurassic | Epoch: | Middle Jurassic |
Stage: | Bathonian | 10 m.y. bin: | Jurassic 4 |
Key time interval: | Early/Lower Bathonian | ||
Age range of interval: | 168.20000 - 165.30000 m.y. ago |
Stratigraphy
Formation: | Josephine | Member: | Volcanopelagic Succession | ||
Local section: | Middle Fork of Smith River | Local bed: | 33.3 m | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Zone 2 delta. Age re-assigned based on Baumgartner et al. (1995).
Informal Formation name. Stated as Volcanic member, Josephine Ophiolite |
Lithology and environment
Primary lithology: | lithified lime mudstone | ||
Secondary lithology: | lithified chert | ||
Includes fossils? | Y | ||
Lithology description: Lens of medium gray, micritic pelagic limestones interbedded with datk gray tuffaceous chert and mudstone | |||
Environment: | basinal (siliceous) | Tectonic setting: | deep ocean basin |
Geology comments: Smith River Subterrane |
Taphonomy
Modes of preservation: | body,original silica |
Size of fossils: | microfossils |
Preservation of anatomical detail: | medium |
Collection methods and comments
Collection methods: | chemical,hydrochloric,field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 51649 | ||
Authorizer: | W. Kiessling | Enterer: | W. Kiessling |
Modifier: | W. Kiessling | Research group: | micropaleontology |
Created: | 2005-06-09 09:40:44 | Last modified: | 2005-06-09 12:40:44 |
Access level: | the public | Released: | 2005-06-09 09:40:43 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
13738. | E. A. Pessagno, Jr., C. D. Blome, D. M. Hull and W. M. Six. 1993. Jurassic radiolaria from the Josephine ophiolite and overlying strata, Smith River subterrane (Klamath Mountains), northwestern California and southwestern Oreg. Micropaleontology 39:93-166 [W. Kiessling/W. Kiessling/J. Alroy] |