US34, Ravenscrag Butte flora: Paleocene, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Trochodendroides speciosa leaf
Berry 1930
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Nyssidium arcticum seed/fruit
Iljinskaja 1974
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Platanites canadensis leaf
McIver and Basinger 1993
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Gastropoda
- Viviparidae
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Lioplacodes tenuicarinata
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Bivalvia
- Cardiida
- Sphaeriidae
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Pisidiidae indet.
Gray 1857
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| spelled with current rank as Pisidiinae | ||||||||||
| Pisidiidae bivalve | ||||||||||
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unclassified
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Plantae informal Unidentified leaf 3 leaf
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Angiospermae
- Saxifragales
- Cercidiphyllaceae
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Trochodendroides flabella leaf
()
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| Trochodendroides flabella comb. nov. | ||||||||||
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Angiospermae
- Magnoliales
- Myristicaceae
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cf. Myristica catahoulensis seed/fruit
Berry 1924
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Saskatchewan | County: | Eastend |
| Coordinates: | 49.5° North, 109.0° West (view map) | ||||
| Paleocoordinates: | 55.6° North, 85.6° West | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| 10 m.y. bin: | Cenozoic 1 | ||
| Key time interval: | Paleocene | ||
| Age range of interval: | 66.00000 - 56.00000 m.y. ago |
Stratigraphy
| Formation: | Ravenscrag | Local bed: | US34 | ||
| Local order: | no particular order | ||||
| Stratigraphy comments: The stratigraphic position of the collection is given relative to the No. 1 coal zone, which is approximately at the base of the formation. US34 is located 17 m above No. 1 coal zone, at the same level as US32, but 2 m east on same face. | |||||
Lithology and environment
| Primary lithology: | claystone |
| Includes fossils? | Y |
| Lithology description: The Ravenscrag Formation consists of interbedded, nonmarine clays, silts, sands, and lignite. The measured section at the Ravenscrag Butte site is about 67 m thick, and lithologically, the formation in divided into two facies; the lower 38 metres comprises the grey facies, the upper 29 metres, the buff facies. At a distance, the two facies are easily distinguishable on the basis of colour. Commonly, the buff facies are less than 31 m thick in measured sections due to erosion or cover at the top. There are four conspicuous beds of coal or coaly shale in the sections at Ravenscrag Butte, including the No. 1 coal zone. The fourth coal zone marks the transition from grey to buff facies. Locality US34 is composed of grey shales and clays. | |
| Environment: | terrestrial indet. |
| Geology comments: During the early Tertiary, most of southern Saskatchewan was a broad alluvial plain dominated by meandering river systems. Locally, at the Ravenscrag Butte site, small lakes or ponds, sluggish streams, swamps and lowland forests successively dominated the area over a period of perhaps 2 million years. | |
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | salvage,surface (in situ),field collection |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 34425 | ||
| Authorizer: | R. Lupia | Enterer: | B. Wilborn |
| Modifier: | B. Wilborn | Research group: | paleobotany |
| Created: | 2003-08-31 20:07:44 | Last modified: | 2003-09-01 13:21:46 |
| Access level: | the public | Released: | 2003-08-31 20:07:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 8995. | E. E. McIver and J. F. Basinger. 1993. Flora of the Ravenscrag Formation (Paleocene), Southwestern Saskatchewan, Canada. Palaeontographica Canadiana 10:1-85 [R. Lupia/B. Wilborn/B. Wilborn] |