Cambridge Greensand

Coordinates: 52°12′N 0°06′E / 52.2°N 0.1°E / 52.2; 0.1
Source: Wikipedia, the free encyclopedia.
Not to be confused with Cambridge Formation.
Cambridge Greensand
Ma
↓
Type
Approximate paleocoordinates
41°00′N 1°48′E / 41.0°N 1.8°E / 41.0; 1.8
RegionEngland
Country UK
ExtentNorth Hertfordshire and Cambridgeshire
Type section
Named forCambridge
LocationArlesey Brickpit
Cambridge Greensand is located in England
Cambridge Greensand

The Cambridge Greensand is a geological unit in England whose strata are earliest

reworked fossils of late Albian
age, including those of dinosaurs and pterosaurs.

Description

The lithology is made out of

glauconitic marl, described as a "chalk mud", containing abundant ostracod, coccolith and foram remains, with a concentration of phosphatic nodules and bones at the base.[1][2]

Vertebrate paleofauna

Birds

Birds
Genus Species Locality Material Notes Images
Enaliornis E. barrette Braincases, vertebrae, pelvis [and] limb elements[3] This genus is the oldest known hesperornithine
E sedgwicki Hindlimb elements[3]
E. seeleyi Assorted cranial and postcranial elements

Dinosaurs

Ornithischians

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon
Ootaxon
Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Ornithischians
Genus Species Locality Material Notes Images
Anoplosaurus A. curtonotus "Partial postcranium"[4]
A. major "Cervical vertebrae."[4] "Vertebrae."[5]
Acanthopholis A. eucercus "[Two] caudal centra."[4] Nomen dubium
A. platypus "Phalanx, caudal centra."[4] Nomen dubium
A. macrocercus "Osteoderms."[4] "Vertebrae, fragmentary skeleton elements."[5] Reassigned to Syngonosaurus
A. stereocercus "Osteoderms."[4] "Vertebrae."[5] Nomen dubium
Eucercosaurus E. tanyspondylus "Vertebrae."[4]
Trachodon T. cantabrigiensis "Dentary tooth."[6] Nomen dubium

Saurischians

Saurischians
Genus Species Locality Material Notes Images
Macrurosaurus M. semnus "Caudal vertebrae"[7]
Titanosauriform
sauropod or indeterminate macronarian

Pterosaurs

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon
Ootaxon
Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Pterosaurs
Genus Species Locality Material Notes Images
Amblydectes A. crassidens Jaw fragments
A. eurygnathus Jaw fragments Possibly a junior synonym of A. crassidens[8]
Camposipterus C. colorhinus Anterior rostra fragments
C. nasutus Partial rostrum
C. sedgwickii Anterior rostrum
Draigwenia D. platystomus Anterior rostrum fragments Formerly Amblydectes platystomus[8]
Lonchodraco L. machaerorhynchus Reassigned to Ikrandraco machaerorhynchus
L. microdon Junior synonym of L. machaerorhynchus
Nicorhynchus N. capito Jaw fragments Possibly synonomous with Coloborhynchus[9]
Ornithocheirus O. simus[10][11]
"Ornithocheirus" denticulatus
"Ornithocheirus" polyodon
Ornithostoma[12][13] O. sedgwicki Jaw fragments Azhdarchoid pterosaur[13]

Ichthyosaurs

Ichthyosaurs
Genus Species Locality Material Notes Images
Cetarthrosaurus C. walkeri[14]
Maiaspondylus M. cantabrigiensis
Pervushovisaurus P. campylodon
Sisteronia
 		S. seeleyi

Lepidosauria

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon
Ootaxon
Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Lepidosauria
Genus Species Locality Material Notes Images
Patricosaurus P. merocratus[15] Chimeric specimen

Invertebrates

Ammonites

See also

  • List of dinosaur-bearing rock formations

References

  1. ^
    S2CID 210304478
    .
  2. ^ a b Cambridge Greensand at BGS
  3. ^ a b "Table 11.1," in Weishampel, et al. (2004). Page 215.
  4. ^ a b c d e f g "Table 17.1," in Weishampel, et al. (2004). Page 367.
  5. ^ a b c "Table 19.1," in Weishampel, et al. (2004). Page 417.
  6. ^ "Table 20.1," in Weishampel, et al. (2004). Page 443.
  7. ^ "Table 13.1," in Weishampel, et al. (2004). Page 270.
  8. ^
    ISSN 1678-2690
    .
  9. ISSN 0031-0220
    .
  10. PMID 23794925
    .
  11. ^ Unwin D.M., 2001, "An overview of the pterosaur assemblage from the Cambridge Greensand (Cretaceous) of Eastern England", Mitteilungen aus dem Museum für Naturkunde in Berlin, Geowissenschaftliche Reihe 4: 189–221
  12. ^ Averianov A.O. (2012). "Ornithostoma sedgwicki – valid taxon of azhdarchoid pterosaurs". Proceedings of the Zoological Institute RAS. 316 (1): 40–49.
  13. ^
    doi:10.1016/j.pgeola.2020.10.004
    .
  14. PMID 24465427
    .
  15. ^ P. M. Barrett and S. E. Evans. 2002. A reassessment of the Early Cretaceous reptile 'Patricosaurus merocratus' Seeley from the Cambridge Greensand, Cambridgeshire, UK. Cretaceous Research 23:231-240
  16. ^ C. W. Wright and W. J. Kennedy. 1979. Origin and evolution of the Cretaceous micromorph ammonite family Flickiidae. Palaeontology 22:685-704
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