Cambridge Greensand

Cambridge Greensand
Stratigraphic range: Earliest Cenomanian ~100 Ma
TypeMember
Unit ofWest Melbury Marly Chalk Formation
UnderliesChalk Group
OverliesGault Formation
Thickness0.1–1 m (0.33–3.28 ft)
Lithology
PrimaryGlauconitic marl
OtherPhosphorite
Location
Coordinates52°12′N 0°06′E / 52.2°N 0.1°E / 52.2; 0.1
Approximate paleocoordinates41°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
Cambridge Greensand (England)

The Cambridge Greensand is a geological unit in England whose strata are earliest Cenomanian in age. It lies above the erosive contact between the Gault Formation and the Chalk Group in the vicinity of Cambridgeshire, and technically forms the lowest member bed of the West Melbury Marly Chalk Formation. It is a remanié deposit, containing 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.

Vertebrate paleofauna

Birds

Dinosaurs

Ornithischians

Saurischians

Pterosaurs

Ichthyosaurs

Lepidosauria

Invertebrates

Ammonites

  • Salaziceras (Salaziceras) salazacense

See also


This page was last updated at 2023-11-03 18:17 UTC. Update now. View original page.

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