Napartulik: Uintan, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Angiospermae
- Fagales
- Betulaceae
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Alnus sp.
Miller 1754
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Betula sp.
Linnaeus 1753
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Angiospermae
- Fagales
- Juglandaceae
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Carya sp.
Nuttall 1818
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Angiospermae
- Saxifragales
- Cercidiphyllaceae
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Cercidiphyllum sp.
Siebold and Zuccarini 1846
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Coniferales
- Cupressaceae
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Chamaecyparis sp.
Spach 1841
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Metasequoia sp.
Miki 1941
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Glyptostrobus sp.
Endlicher 1847
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Pinopsida
- Pinales
- Pinaceae
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Tsuga sp.
Carrière 1855
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Keteleeria sp.
Carrière 1866
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Pseudolarix sp.
Gordon and Glendinning 1858
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Picea sp.
Dietrich 1824
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Larix altoborealis
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Pinus sp.
Linnaeus 1753
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Insecta
- Coleoptera
- Curculionidae
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aff. Dendroctonus sp.
Erichson 1836
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1 specimen | |||||||||
| bark engraving on branch of Larix altoborealis | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Nunavut |
| Coordinates: | 79.9° North, 89.0° West (view map) | ||
| Paleocoordinates: | 79.4° North, 49.2° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2-3 | ||
| Key time interval: | Uintan | ||
| Age range of interval: | 46.20000 - 39.70000 m.y. ago |
Stratigraphy
| Geological group: | Eureka Sound | Formation: | Buchanan Lake | ||
| Stratigraphy comments: The stratigraphic occurrence of the specimen is from the Buchanan Lake Formation of the Eureka Sound Group; it was retrieved from the upper lignitic, coal-bearing member. It is of middle Eocene age (Ricketts and McIntyre, 1986), corresponding to the Uintan North American land mammal age (41.3–47.5 Ma) and the Lutetian Stage (Gradstein and Ogg, 1996). | |||||
Lithology and environment
| Primary lithology: | unlithified sandstone | ||
| Environment: | "floodplain" | Tectonic setting: | foreland basin |
| Geology comments: This site prominently exposes the upper- most of the four members of the Buchanan Lake Formation, namely an upper lignitic and coal-bearing unit. This unit contains in situ leaf litter mats that have produced vegetative and reproductive organs of gymnospermous and angiospermous swamp forest and associated taxa, including needle fascicles, leaves, cones, seeds, and wood. These plants lived in a local floodplain basin and were rapidly buried by fluvial systems and debris flows originating from the ancestral Princess Margaret Mountain Range a few kilometers to the west (Ricketts, 1991). Rapid burial by coarse alluvial deposits resulted in the pristine morphological preservation observed in the fossils, through elimination or reduction of oxygen to the entombed plants, and thus prevented microbial decay (Ricketts and McIntyre, 1986; Basinger, McIver, and LePage, 1988). | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 139662 | ||
| Authorizer: | M. Clapham | Enterer: | J. Karr |
| Modifier: | M. Clapham | Research group: | paleoentomology |
| Created: | 2013-02-15 11:01:20 | Last modified: | 2014-08-08 11:26:39 |
| Access level: | the public | Released: | 2013-08-15 11:01:20 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 44914. | C. C. Labandeira, B. A. LePage, and A. H. Johnson. 2001. A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization?. American Journal of Botany 88(11):2026-2039 [M. Clapham/J. Karr/M. Clapham] |