Cromhall Quarry Site 2: Carnian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
|
||||||||||
|
Sphenodontia indet.
(Jaekel 1910)
|
||||||||||
|
= Diphydontosaurus sp.
Whiteside 1986
|
Fraser 1994 | |||||||||
|
Planocephalosaurus sp.
Fraser 1982
|
||||||||||
|
= Planocephalosaurus robinsonae
Fraser 1982
|
Fraser 1994 | |||||||||
|
Reptilia
- Sphenodontidae
|
||||||||||
|
Sigmala sigmala
Fraser 1986
|
Fraser 1986 | 1 specimen | ||||||||
|
Reptilia
- Kuehneosauridae
|
||||||||||
|
Kuehneosaurus sp.
Robinson 1962
|
Fraser 1994 | |||||||||
|
Reptilia
- Archosauria
|
||||||||||
|
Archosauria indet.
Cope 1869
|
||||||||||
|
Reptilia
|
||||||||||
|
Thecodontia indet.
Owen 1859
|
||||||||||
|
= Suchia indet.
Krebs 1974
|
Fraser 1994 | |||||||||
| "Suchian B" | ||||||||||
|
Saltoposuchus sp.
von Huene 1921
|
Fraser 1994 | |||||||||
| "(= Terrestrisuchus)" | ||||||||||
|
= aff. Terrestrisuchus sp.
Crush 1984
|
Whiteside and Marshall 2008 | |||||||||
| 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 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 - 227 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 |
| Abundance in sediment: | common |
| 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: | 13174 | ||
| Authorizer: | E. Fara, M. Carrano, R. Butler | Enterer: | E. Fara, M. Carrano, R. Butler |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-01-25 02:02:37 | Last modified: | 2024-02-16 10:23:58 |
| Access level: | the public | Released: | 2002-01-25 02:02:37 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 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] |
Secondary references:
| 44028 | N. C. Fraser. 1985. Vertebrate faunas from Mesozoic fissure deposits of south west Britain. Modern Geology 9:273-300 [R. Butler/R. Butler] | |
| 44066 | N. C. Fraser. 1986. New Triassic sphenodontids from south-west England and a review of their classification. Palaeontology 29:165-186 [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] | |
| 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] |