US30, Ravenscrag Butte flora: Paleocene, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Equisetum fluviatoides leaf, root
McIver and Basinger 1989
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Azolla vellus leaf, megaspore
Jain and Hall 1969
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Massulae, leaves, microspores, megaspores. | ||||||||||
Mesocyparis borealis leaf, seed repro
McIver and Basinger 1987
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Leaves, seed cones, and pollen cones. | ||||||||||
Spirodela scutata leaf, root
Dawson
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Trochodendroides speciosa leaf
Berry 1930
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Nyssidium arcticum seed/fruit
Iljinskaja 1974
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Rorippides aquatica leaf
McIver and Basinger 1993
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Kurtziflora antherosa flower, microspore
McIver et al.
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Flowers, stamens, filaments, anthers, pollen. | ||||||||||
Plantae informal moss leaf
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moss gametophyte | ||||||||||
Plantae informal Unidentified fern 1 leaf
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1 specimen | |||||||||
Plantae informal Unidentified monocot leaf 1 leaf
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Plantae informal Unidentifed leaf 1 leaf
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Plantae informal roots root
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Magnoliopsida
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Dicotylophyllum anomalum leaf
(Ward 1887)
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Trapago angulata leaf
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synonym of Quereuxia | ||||||||||
Trapago angulata comb. nov. | ||||||||||
Angiospermae
- Nymphaeales
- Nymphaeaceae
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Paranymphaea crassifolia leaf
Newberry 1935
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Angiospermae
- Araceae
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Pistia corrugata leaf, root
Lesquereux 1874
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Angiospermae
- Dipsacales
- Caprifoliaceae
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Viburnum sp. seed/fruit
Linnaeus 1753
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fruits | ||||||||||
Angiospermae
- Cornales
- Cornaceae
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Cornophyllum newberryi leaf
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Cornophyllum newberryi comb. nov. | ||||||||||
Angiospermae
- Rosales
- Rosaceae
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Prunites maclearnii leaf
()
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Prunites maclearnii comb. nov. | ||||||||||
Amelanchites similis leaf
(Newberry 1868)
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Amelanchites similis comb. nov. | ||||||||||
Polypodiopsida
- Blechnaceae
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Woodwardia gravida leaf
Hickey 1977
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Polypodiopsida
- Polypodiales
- Onocleaceae
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Onoclea hesperia leaf
Hickey 1977
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Gastropoda
- Heterostropha
- Subulinidae
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Fortuna marsilioides leaf
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Fortuna marsilioides comb. nov. | ||||||||||
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: | US30 | ||
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. US30 is located 10 m above the base of the No. 1 coal zone, east of US5 (west face). |
Lithology and environment
Primary lithology: | "shale" |
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 30 is composed of grey and buff shales and sands. | |
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: | 34420 | ||
Authorizer: | R. Lupia | Enterer: | B. Wilborn |
Modifier: | B. Wilborn | Research group: | paleobotany |
Created: | 2003-08-31 15:39:56 | Last modified: | 2003-09-01 13:20:31 |
Access level: | the public | Released: | 2003-08-31 15:39:56 |
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] |