Hornsleasow Quarry: Early/Lower Bathonian, United Kingdom
collected by K. Gardner 1987
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Nodosariata
- Robertinida
- Epistominidae
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Epistomina regularis
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Metcalf et al. 1992 | |||||||||
Trochamminidae
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Trochammina canningensis
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Metcalf et al. 1992 | |||||||||
Lycopodiopsida
- Selaginellales
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Densoisporites velatus
Dettmann 1963
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Metcalf et al. 1992 | |||||||||
Algae
- Botryococcaceae
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Botryococcus braunii
Kutzing 1849
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Metcalf et al. 1992 | |||||||||
Coniferales
- Podocarpaceae
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Callialasporites sp.
Sukh-Dev 1961
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Metcalf et al. 1992 | |||||||||
Anthozoa
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Anthozoa indet.
Ehrenberg 1834
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Metcalf et al. 1992 | |||||||||
"corals" | ||||||||||
Gastropoda
- Viviparidae
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Viviparus cf. scoticus
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Metcalf et al. 1992 | |||||||||
Gastropoda
- Naticidae
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Naticidae indet.
Guilding 1834
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Metcalf et al. 1992 | |||||||||
Gastropoda
- Heterostropha
- Valvatidae
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Valvata cf. comes
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Metcalf et al. 1992 | |||||||||
Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Metcalf et al. 1992 | |||||||||
Bivalvia
- Pectinida
- Limidae
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? Plagiostoma sp.
Sowerby 1814
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Metcalf et al. 1992 | |||||||||
Bivalvia
- Ostreida
- Gryphaeidae
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Praeexogyra sp.
Charles 1952
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Metcalf et al. 1992 | |||||||||
Ostracoda
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Ostracoda indet.
Latreille 1802
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Metcalf et al. 1992 | |||||||||
Echinoidea
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Echinoidea indet.
(Leske 1778)
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Metcalf et al. 1992 | |||||||||
Chondrichthyes
- Hybodontiformes
- Acrodontidae
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Asteracanthus sp.
Agassiz 1836
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Metcalf et al. 1992 | |||||||||
GLRCM G.50031 | ||||||||||
Amphibia
- Anura
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? Discoglossidae indet.
Günther 1859
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Metcalf et al. 1992 | |||||||||
= ? Anura indet.
Fischer von Waldheim 1813
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Metcalf and Walker 1994 | |||||||||
"possible frog remains" | ||||||||||
Amphibia
- Temnospondyli
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Caudata indet.
Scopoli 1777
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Metcalf et al. 1992 | |||||||||
"salamanders" | ||||||||||
Caudata informal indet. B
Scopoli 1777
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Evans and Milner 1994 | |||||||||
? Marmorerpeton sp.
Evans et al. 1988
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Metcalf et al. 1992 | |||||||||
GLRCM G.60406 | ||||||||||
Amphibia
- Temnospondyli
- Albanerpetontidae
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? Albanerpetontidae indet.
Fox and Naylor 1982
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Evans and Milner 1994 | |||||||||
= Albanerpetontidae indet.
Fox and Naylor 1982
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Gardner and Böhme 2008 | |||||||||
unclassified
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Therapsida indet.
Broom 1905
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Evans and Milner 1994 | |||||||||
Tritylodontidae
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Tritylodontidae indet.
Cope 1884
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Evans and Milner 1994 | |||||||||
Stereognathus sp.
Charlesworth 1854
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Metcalf et al. 1992 | 70 specimens | ||||||||
GLRCM G.53809 | ||||||||||
= Stereognathus ooliticus
Charlesworth 1854
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Panciroli et al. 2017 | |||||||||
Mammalia
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Mammalia indet.
Linnaeus 1758
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Evans and Milner 1994 | |||||||||
Mammalia
- Multituberculata
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Multituberculata indet.
Cope 1884
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Metcalf et al. 1992 | |||||||||
Mammalia
- Pantotheria
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Eupantotheria indet.
Kermack and Musset 1958
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Metcalf et al. 1992 | |||||||||
GLRCM G.66570; "eupantotheres" | ||||||||||
? Eupantotheria indet.
Kermack and Musset 1958
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Metcalf et al. 1992 | |||||||||
GLRCM G.66856 | ||||||||||
Docodonta
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Docodonta indet.
Kretzoi 1946
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Metcalf et al. 1992 | |||||||||
Reptilia
- Testudines
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Testudines indet.
Batsch 1788
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Metcalf et al. 1992 | |||||||||
GLRCM G.66759 | ||||||||||
Reptilia
- Squamata
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aff. Squamata indet.
Oppel 1811
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Metcalf et al. 1992 | |||||||||
"squamate affinites" | ||||||||||
Reptilia
- Crocodylia
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Crocodylia indet.
(Owen 1842)
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Metcalf et al. 1992 | |||||||||
GLRCM G.55545, 50002 | ||||||||||
Reptilia
- Goniopholididae
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Goniopholidae indet.
(Cope 1875)
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Metcalf et al. 1992 | 40 %-specimens | ||||||||
original and current combination Goniopholididae | ||||||||||
"goniopholids" | ||||||||||
Reptilia
- Teleosauridae
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? Teleosauridae indet.
Geoffroy 1831
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Metcalf et al. 1992 | |||||||||
Reptilia
- Fabrosauridae
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? Phyllodon sp.
Thulborn 1975
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Metcalf et al. 1992 | |||||||||
GLRCM G.53264; "fabrosaurid similar to Phyllodon sp." | ||||||||||
= ? Fabrosauridae indet.
Galton 1972
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Evans and Milner 1994 | |||||||||
Reptilia
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? Stegosauria indet.
Marsh 1877
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Metcalf et al. 1992 | |||||||||
GLRCM G.64020 | ||||||||||
Reptilia
- Hypsilophodontidae
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cf. Alocodon sp.
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Metcalf et al. 1992 | |||||||||
"hypsilophodontid similar to Alocodon sp." | ||||||||||
= Hypsilophodontidae indet.
Dollo 1882
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Evans and Milner 1994 | |||||||||
Reptilia
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? Maniraptora indet.
Gauthier 1986
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Metcalf et al. 1992 | |||||||||
GLRCM G.51422; small theropods, possibly maniraptoran or dromaeosaurid | ||||||||||
= Coelurosauria indet.
Huene 1914
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Evans and Milner 1994 | |||||||||
Reptilia
- Megalosauridae
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Megalosaurus sp.
Parkinson 1822
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Metcalf et al. 1992 | |||||||||
GLRCM G.66742 | ||||||||||
Reptilia
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Ceratosauria indet.
(Marsh 1884)
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Metcalf et al. 1992 | |||||||||
Cetiosaurus sp.
Owen 1841
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Metcalf et al. 1992 | |||||||||
GLRCM G.50051 | ||||||||||
? Pterodactyloidea indet.
Plieninger 1901
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Metcalf et al. 1992 | |||||||||
= Pterosauria indet.
Kaup 1834
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Unwin 1996 | |||||||||
Reptilia
- Pterosauria
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Pterosauria indet.
Kaup 1834
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Reptilia
- Rhamphorhynchidae
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Rhamphorhynchoidea indet.
Plieninger 1901
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Metcalf et al. 1992 | |||||||||
GLRCM G.66839; "rhamphorhynchoid" | ||||||||||
= Rhamphocephalus sp.
Seeley 1880
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Unwin 1996 | |||||||||
Teeth and postcranial remains | ||||||||||
Reptilia
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Lepidosauromorpha indet.
Benton 1983
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Evans and Milner 1994 | |||||||||
Lepidosauromorpha informal indet. A
Benton 1983
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Evans and Milner 1994 | |||||||||
Reptilia
- Sphenodontia
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Sphenodontidae indet.
Cope 1871
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Metcalf et al. 1992 | |||||||||
= Sphenodontia indet.
Jaekel 1910
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Metcalf and Walker 1994 | |||||||||
Reptilia
- Choristodera
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Choristodera indet.
Cope 1876
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Evans and Milner 1994 | |||||||||
Reptilia
- Cteniogenyidae
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Cteniogenys sp.
Gilmore 1928
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Metcalf et al. 1992 | |||||||||
GLRCM G.66855, 51749 | ||||||||||
= cf. Cteniogenys sp.
Gilmore 1928
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Metcalf and Walker 1994 | |||||||||
"similar to those of the small diapsid reptile Cteniogenys sp." | ||||||||||
Actinopteri
- Pycnodontiformes
- Pycnodontidae
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Pycnodontidae indet.
(Agassiz 1833)
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Metcalf et al. 1992 | |||||||||
Actinopteri
- Lepisosteiformes
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Lepidotes sp.
Agassiz 1832
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Metcalf et al. 1992 | |||||||||
GLRCM G.50001 | ||||||||||
see common names |
Geography
Country: | United Kingdom | State/province: | England | County: | North Gloucestershire |
Coordinates: | 52.0° North, 1.8° West (view map) | ||||
Paleocoordinates: | 41.6° North, 8.6° East | ||||
Basis of coordinate: | estimated from map | ||||
Altitude: | 153 meters | ||||
Geographic resolution: | outcrop |
Time
Period: | Jurassic | Epoch: | Middle Jurassic |
Stage: | Bathonian | 10 m.y. bin: | Jurassic 4 |
*Period: | Middle Jurassic | ||
*International age/stage: | Early/Lower Bathonian | ||
Key time interval: | Early/Lower Bathonian | Zone: | Zigzagiceras zigzag |
Age range of interval: | 167.70000 - 164.70000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Geological group: | Great Oolite | Formation: | Chipping Norton Limestone | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: "Hornsleasow Clay Unit" placed between Chipping Norton Member (above) and Hook Norton Member (below). Upper part of unit is the "Green Clay" and lower part is the "Grey Clay". From the macrescens Subzone of the zigzag Zone |
Lithology and environment
Primary lithology: | planar lamination,bioturbation,pebbly carbonaceous claystone |
Secondary lithology: | desiccation cracks claystone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: Primary (Grey Clay): "matrix-supported, but contains large, irregularu subrounded limestone cobbles (concentrated in the basal portion, which is interpreted as a regolith), with associated lime and lime-fraction silica sand. The clay is smectitic, with a high organic content, and it contains much partially lignitized wood...finely laminated. This lamination has been somewhat disrupted, possibly by bioturbation." Secondary (Green Clay): "more homogenous than the Grey Clay. Limestone clasts and sand make up only 3 percent of the composition by weight. The deposit has more silica and sand and is an illite/chlorite clay. Vertical rootlets pervade the layer, extending from the mud-cracked, upper surface...into the underlying Grey Clay...The plant material is somewhat oxidized." | |
Environment: | karst indet. |
Glacial or sequence phase: | regressive |
Geology comments: Clay units were deposited into the karstic surface of the Hook Norton Member. Clay deposition involved low paleocurrent activity and increasingly anoxic conditions. The unit "is interpreted as a paleosol. The depositional environment...is one of marshy, low-pH type. The partially decayed organic material within this deposit suggests relatively reducing conditions, and the presence of pyrolusite (MnO2)...is suggestive of bog or lake deposition...salinity was low to moderate...The Grey Clay is a waterlogged, boggy paleosol developing within a freshwater to brackish-water pond. The absence of dispersed kerogen indicates a low-energy depositional environment, with little fluvial influence...The Green Clay is also interpreted as a paleosol, deposited under more oxidizing, high-pH conditions. |
Taphonomy
Modes of preservation: | body |
Lagerst�tten type: | concentrate |
Degree of concentration: | -multiple events |
Size of fossils: | macrofossils,mesofossils,microfossils |
Spatial orientation: | random |
Preservation of anatomical detail: | poor |
Articulated whole bodies: | none |
Associated major elements: | some |
Disassociated major elements: | many |
Disassociated minor elements: | many |
Fragmentation: | frequent |
Bioerosion: | occasional |
Feeding/predation traces: | gastric dissolution |
Temporal resolution: | time-averaged |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | bulk,surface (in situ),sieve,field collection | ||
Reason for describing collection: | general faunal/floral analysis | ||
Collectors: | K. Gardner | Collection dates: | 1987 |
Metadata
Also known as: | Snowshill Quarry | ||
Database number: | 31054 | ||
Authorizer: | M. Carrano, R. Butler | Enterer: | M. Carrano, K. Maguire, R. Butler |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2003-04-09 20:44:33 | Last modified: | 2012-07-05 15:20:58 |
Access level: | the public | Released: | 2003-04-09 20:44:33 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
8380. | 5% 12660 | S. J. Metcalf and R. J. Walker. 1994. A new Bathonian microvertebrate locality in the English Midlands. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, edited by N. C. Fraser and H.-D. Sues. Cambridge University Press, Cambridge 322-331 [M. Carrano/M. Carrano/J. Alroy] |
Secondary references:
10557 | ETE | S. E. Evans and A. R. Milner. 1994. Middle Jurassic microvertebrate assemblages from the British Isles. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods, N. C. Fraser and H.-D. Sues (eds.), Cambridge University Press 303-321 [M. Carrano/M. Carrano/M. Carrano] |
52039 | J. D. Gardner and M. Böhme. 2008. Review of the Albanerpetontidae (Lissamphibia), with comments on the paleoecological preferences of European Tertiary albanerpetontids. In J. T. Sankey & S. Baszio (ed.), Vertebrate Microfossil Assemblages: Their Role in Paleoecology and Paleobiogeography 178-218 [M. Carrano/M. Carrano] | |
27913 | ETE | S. J. Metcalf, R. F. Vaughan, M. J. Benton, J. Cole, M. J. Simms and D. L. Dartnall. 1992. A new Bathonian (Middle Jurassic) microvertebrate site, within the Chipping Norton Limestone Formation at Honsleasow Quarry, Gloucestershire. Proceedings of the Geologists' Association 103:321-342 [M. Carrano/M. Carrano] |
65143 | E. Panciroli, S. Walsh, N. C. Fraser, S. L. Brusatte, and I. Corfe. 2017. A reassessment of the postcanine dentition and systematics of the tritylodontid Stereognathus (Cynodontia, Tritylodontidae, Mammaliamorpha), from the Middle Jurassic of the United Kingdom. Journal of Vertebrate Paleontology 37(5):e1351448:1-20 [M. Carrano/M. Carrano] | |
30893 | D. M. Unwin. 1996. The fossil record of Middle Jurassic pterosaurs. In M. Morales (ed.), The Continental Jurassic, Museum of Northern Arizona Bulletin 60:291-304 [R. Butler/R. Butler] |