Cromhall Quarry Site 1: Carnian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Tetrapoda indet.
(Jaekel 1911)
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Walkden and Fraser 1993 | 1 specimen | ||||||||
| AUP 11161 | ||||||||||
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Reptilia
- Procolophonidae
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Procolophonidae indet.
Lydekker 1889
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Fraser 1994 | 2 specimens | ||||||||
| "procolophonid B" | ||||||||||
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= Hwiccewyrm trispiculum
Butler et al. 2023
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Butler et al. 2023 | |||||||||
| AUP11308. Left and right frontals | ||||||||||
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Reptilia
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Thecodontia indet.
Owen 1859
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Fraser and Walkden 1983 | |||||||||
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= Suchia indet.
Krebs 1974
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Fraser 1994 | |||||||||
| "suchian A" | ||||||||||
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Saltoposuchus sp.
von Huene 1921
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Fraser 1994 | |||||||||
| "(= Terrestrisuchus)" | ||||||||||
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= aff. Terrestrisuchus sp.
Crush 1984
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Whiteside and Marshall 2008 | |||||||||
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Reptilia
- Clevosauridae
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Clevosaurus hudsoni n. gen., n. sp.
Swinton 1939
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Fraser and Walkden 1983 | 1 specimen | ||||||||
| UMZC T 1271 | ||||||||||
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Reptilia
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Sphenodontia indet.
(Jaekel 1910)
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Fraser and Walkden 1983 | |||||||||
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= Diphydontosaurus sp.
Whiteside 1986
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Fraser 1994 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | England | County: | Gloucestershire |
| Coordinates: | 51.6° North, 2.4° West (view map) | ||||
| Paleocoordinates: | 20.6° North, 6.5° East | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | small collection |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Carnian | 10 m.y. bin: | Triassic 3 |
| *Period: | Late/Upper Triassic - Late/Upper Triassic | ||
| *International age/stage: | Norian - Norian | ||
| Key time interval: | Carnian | ||
| Age range of interval: | 237.00000 - 227.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Whiteside & Marshall (2008) argue for a Rhaetian age based upon the shared presence of Planocephalosaurus with deposits at Tytherington dated as Rhaetian on the basis of palynomorphs, and the presence of fish remains that are typical of the Rhaetian Penarth Group.
Morton et al. 2017: biostratigraphy of conchostracans from the fissure deposits of Cromhall Quarry also support a late Rhaetian age | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" |
| Secondary lithology: | green,red or brown mudstone |
| Includes fossils? | Y |
| Lithology description: red or green mudstones interbedded with thin limestones largely composed of recemented detrital crinoid debris | |
| Environment: | fissure fill |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | concentrated |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | good |
| Disassociated minor elements: | all |
| Fragmentation: | frequent |
| Temporal resolution: | condensed |
Collection methods and comments
| Collection methods: | bulk,chemical,mechanical,acetic,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Material in University of Aberdeen palaeontological collection
Bone material is extracted from well cemented sediments by placing them in acetic or formic acid baths (between 5 percent and 15 percent solution) and then thoroughly washing and sifting the residues. However, where the bone occurs in soft marls it must be removed manually using fine needles. | |
Metadata
| Also known as: | Cromhall Quarry, Slickstones | ||
| Database number: | 13173 | ||
| Authorizer: | E. Fara, M. Carrano, E. Vlachos, R. Butler | Enterer: | E. Fara, R. Butler, M. Carrano, F. Aspromonte |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-01-25 01:53:16 | Last modified: | 2024-02-16 10:23:47 |
| Access level: | the public | Released: | 2002-01-25 01:53:16 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 53178. | W. A. Macfadyen. 1970. Geological Highlights of the West Country. A Nature Conservancy Handbook 1-296 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 86209 | R. J. Butler, L. E. Meade, T. J. Cleary, K. T. McWhirter, E. E. Brown, T. S. Kemp, J. Benito and N. C. Fraser. 2023. Hwiccewyrm trispiculum gen. et sp. nov., a new leptopleuronine procolophonid from the Late Triassic of southwest England. The Anatomical Record 1-31 [E. Vlachos/F. Aspromonte] | |
| 44028 | N. C. Fraser. 1985. Vertebrate faunas from Mesozoic fissure deposits of south west Britain. Modern Geology 9:273-300 [R. Butler/R. Butler] | |
| 12289 | N. C. Fraser. 1994. Assemblages of small tetrapods from British Late Triassic fissure deposits. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, N. C. Fraser and H.-D. Sues (eds.), Cambridge University Press 214-226 [R. Whatley/R. Whatley/R. Whatley] | |
| 4380 | 5% 27000 | N. C. Fraser and G.M. Walkden. 1983. The ecology of a Late Triassic reptile assemblage from Gloucestershire, England. Palaeogeography, Palaeoclimatology, Palaeoecology 42:341-365 [E. Fara/E. Fara/E. Fara] |
| 87573 | M. J. Simms and K. Drost. 2024. Caves, dinosaurs and the Carnian Pluvial Episode: Recalibrating Britain’s Triassic karst ‘fissures'. Palaeogeography, Palaeoclimatology, Palaeoecology 638:112041 [M. Carrano/M. Carrano] | |
| 45096 | G. M. Walkden and N. C. Fraser. 1993. Late Triassic fissure sediments and vertebrate faunas: environmental change and faunal succession at Cromhall, south west Britain. Modern Geology 18:511-535 [M. Carrano/M. Carrano] | |
| 25869 | ETE | D. I. Whiteside and J. E. A. Marshall. 2008. The age, fauna and palaeoenvironment of the Late Triassic fissure deposits of Tytherington, South Gloucesterhire, UK. Geological Magazine 145(1):105-147 [M. Carrano/M. Carrano/R. Butler] |