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
Enaliornis barrette - "Braincases, vertebrae, pelvis [and] limb elements.." E sedgwicki - "Hindlimb elements." E. seeleyi - "Assorted cranial and postcranial elements"
Dinosaurs
Ornithischians
Anoplosaurus curtonotus - "Partial postcranium." A. major - "Cervical vertebrae." "Vertebrae." Acanthopholis eucercus - "[Two] caudal centra." Acanthopholis platypus (in part) - "Phalanx, caudal centra." Acanthopholis macrocercus (aka Syngonosaurus) - "Osteoderms." "Vertebrae, fragmentary skeleton elements." Acanthopholis stereocercus - "Osteoderms." "Vertebrae." Eucercosaurus tanyspondylus - "Vertebrae." Trachodon cantabrigiensis - "Dentary tooth."
Saurischians
Macrurosaurus semnus - "Caudal vertebrae"
Pterosaurs
Amblydectes crassidens
A. eurygnathus
Camposipterus colorhinus
C. nasutus
Camposipterus sedgwickii
Draigwenia platystomus
Lonchodraco machaerorhynchus
Lonchodraco microdon
Ornithocheirus simus
Nicorhynchus capito
"Ornithocheirus" denticulatus
"Ornithocheirus" polyodon
Ornithostoma sedgwicki
Ichthyosaurs
Cetarthrosaurus walkeri
Maiaspondylus cantabrigiensis (originally Ophthalmosaurus) Pervushovisaurus campylodon Sisteronia seeleyi