The Lealt Shale Formation is a Middle Jurassic geologic formation in Scotland. Fossil ornithopod, theropod and stegosaur tracks, a theropod dinosaur tooth and the pterosaur Dearc have been reported from the formation.[1][2][3] The lithology consists of silty fissile mudstones with subordinate thin limestones.[4]
| Lealt Shale Formation | |
|---|---|
| Stratigraphic range: | |
 Thinly bedded limestones of the Lealt Shale formation overlain by Paleogene lava | |
| Type | Geological formation |
| Unit of | Great Estuarine Group |
| Sub-units | Kildonnan Member, Lonfearn Member |
| Underlies | Valtos Sandstone Formation |
| Overlies | Elgol Sandstone Formation |
| Thickness | Between 45 and 50 m |
| Lithology | |
| Primary | Mudstone |
| Other | Limestone |
| Location | |
| Region | Europe |
| Country |  Scotland |
| Extent | Inner Hebrides |
| Type section | |
| Named for | Lealt, Skye |
| Named by | Harris and Hudson |
| Location | Cliffs east of Lonfearn (partial), Coastal exposure 2.5 km north of Kildonnan, Eigg (partial) |
| Year defined | 1980 |
| Thickness at type section | Lonfearn: 26 to 30 m (partial) Kildonnan: 23 m (partial) |
Fossil content
editColor key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
editTheropoda
edit| Theropod of the Lealt Shale Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Theropoda Indet. | Indeterminate | |||||
Pterosaurs
edit| Pterosaurs of the Lealt Shale Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Dearc[5] | D. sgiathanach | A angustinaripterin rhamphorhynchid |  | |||
See also
edit
Footnotes
edit- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ Young, Chloe M. E.; Hendrickx, Christophe; Challands, Thomas J.; Foffa, Davide; Ross, Dugald A.; Butler, Ian B.; Brusatte, Stephen L. (May 2019). "New theropod dinosaur teeth from the Middle Jurassic of the Isle of Skye, Scotland". Scottish Journal of Geology. 55 (1): 7–19. doi:10.1144/sjg2018-020. hdl:20.500.11820/063549bc-2a00-4ddc-bcf6-a1bc2f872c26. ISSN 0036-9276. S2CID 134102042.
- ^ dePolo, Paige E.; Brusatte, Stephen L.; Challands, Thomas J.; Foffa, Davide; Wilkinson, Mark; Clark, Neil D. L.; Hoad, Jon; Pereira, Paulo Victor Luiz Gomes da Costa; Ross, Dugald A.; Wade, Thomas J. (11 March 2020). Fiorillo, Anthony R. (ed.). "Novel track morphotypes from new tracksites indicate increased Middle Jurassic dinosaur diversity on the Isle of Skye, Scotland". PLOS ONE. 15 (3): e0229640. doi:10.1371/journal.pone.0229640. ISSN 1932-6203. PMC 7065758.
- ^ "Lealt Shale Formation". BGS Lexicon of Named Rock Units. Retrieved 22 February 2022.
- ^ Jagielska, N.; O'Sullivan, M.; Funston, G. F.; Butler, I. B.; Challands, T. J.; Clark, N. D. L.; Fraser, N. C.; Penny, A.; Ross, D. A.; Wilkinson, M.; Brusatte, S. L. (2022). "A skeleton from the Middle Jurassic of Scotland illuminates an earlier origin of large pterosaurs". Current Biology. 32 (6): 1446–1453.e4. Bibcode:2022CBio...32E1446J. doi:10.1016/j.cub.2022.01.073. hdl:10023/27028. PMID 35196508. S2CID 247013664.
References
edit- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.
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