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Chalk - Lower Chalk, England, UK

Group	Chalk
Formation	Lower Chalk
Age:	93.9 - 89.8 Ma Late/Upper Cretaceous
Interval	Early Cenomanian
Lithology	chalk, chalk/sandstone
Number of Collections	22
Number of Occurrences	28

Recorded Sample Locations

Location	Region	Stratigraphic Name
Betchworth	Mole Valley, Surrey, England, UK	Chalk - Lower Chalk
Lidden Spout	Wealden, East Sussex, England, UK	Chalk - Lower Chalk
Frome Vauchurch	West Dorset, Dorset, England, UK	Chalk - Lower Chalk
Burwell	East Cambridgeshire, Cambridgeshire, England, UK	Chalk - Lower Chalk
Fulbourn	South Cambridgeshire, Cambridgeshire, England, UK	Chalk - Lower Chalk
Burham	Kent, England, UK	Chalk - Lower Chalk
Dover	Dover, Kent, England, UK	Chalk - Lower Chalk
Ivinghoe Aston	Aylesbury Vale, Buckinghamshire, England, UK	Chalk - Lower Chalk
Reigate	Reigate and Banstead, Surrey, England, UK	Chalk - Lower Chalk
Folkestone	Folkestone and Hythe District, Kent, England, UK	Chalk - Lower Chalk
Cherry Hinton	Cambridge, Cambridgeshire, England, UK	Chalk - Lower Chalk
Haslingfield	South Cambridgeshire, Cambridgeshire, England, UK	Chalk - Lower Chalk
Burghclere Station	Basingstoke and Deane, Hampshire, England, UK	Chalk - Lower Chalk
Beer Head	East Devon, Devon, England, UK	Chalk - Lower Chalk
Chardstock	East Devon, Devon, England, UK	Chalk - Lower Chalk
Hooken Cliff	East Devon, Devon, England, UK	Chalk - Lower Chalk
Sundon church	Central Bedfordshire, Bedfordshire, England, UK	Chalk - Lower Chalk
Butler's Cross	Wycombe, Buckinghamshire, England, UK	Chalk - Lower Chalk
Littlington	South Cambridgeshire, Cambridgeshire, England, UK	Chalk - Lower Chalk
Beddingham	East Sussex, England, UK	Chalk - Lower Chalk
Hamsey	East Sussex, England, UK	Chalk - Lower Chalk

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Grey Chalk	101 - 93.9 Ma Late/Upper Cretaceous	chalk	1
Chalk Marl	86.3 - 83.6 Ma Late/Upper Cretaceous	chalk, sandstone	10
Folkestone	112 - 101 Ma Early/Lower Cretaceous		4
Gault	105 - 99.6 Ma Cretaceous	chalk, claystone	12
Greensand	11.6 - 7.25 Ma Miocene	sandstone	22
Lower Chalk	99.6 - 93.5 Ma Late/Upper Cretaceous	marl, wackestone, lime mudstone, chalk	184
Lower Chalk - Grey Chalk	99.6 - 93.5 Ma Late/Upper Cretaceous	limestone, wackestone	150
Lower Greensand - Atherfield Clay	125 - 113 Ma Early/Lower Cretaceous	shale	72
Lower Greensand - Folkestone	112 - 101 Ma Early/Lower Cretaceous	sandstone/chert, sandstone, "shale", sandstone/ironstone, sandstone/"carbonate", sandstone/"shale", ironstone	345
Lower Greensand - Hythe Beds	125 - 113 Ma Early/Lower Cretaceous	carbonate, "shale"/"carbonate", "shale"/chert, sandstone	87
Lower Greensand - Sandgate	125 - 113 Ma Early/Lower Cretaceous	sandstone, "shale"	237
Chalk	93.9 - 66.0 Ma Late/Upper Cretaceous	chalk, chalk/marl, mudstone	38
Chalk - Holywell Nodular Chalk - Melbourn Rock	93.5 - 89.3 Ma Late/Upper Cretaceous	chalk	2
Chalk - Holywell Nodular Chalk - Plenus Marl	93.9 - 89.8 Ma Late/Upper Cretaceous	chalk	1
Chalk - Lewes Nodular Chalk	89.8 - 86.3 Ma Late/Upper Cretaceous	chalk	37
Chalk - Middle Chalk	93.5 - 89.3 Ma Late/Upper Cretaceous	chalk	36
Chalk - Upper Chalk	70.6 - 66.0 Ma Late/Upper Cretaceous	chalk	140
Selborne - Gault	105 - 99.6 Ma Cretaceous	carbonate	4

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Orbirhynchia mantelliana species	7	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Basiliolidae : Orbirhynchia : *Orbirhynchia mantelliana*	100.5 - 93.9 Ma Late/Upper Cretaceous
Orbirhynchia multicostata species	7	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Basiliolidae : Orbirhynchia : *Orbirhynchia multicostata*	93.9 - 89.8 Ma Late/Upper Cretaceous
Orbirhynchia obscura species	7	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Basiliolidae : Orbirhynchia : *Orbirhynchia obscura*	100.5 - 93.9 Ma Late/Upper Cretaceous
Orbirhynchia parva species	7	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Basiliolidae : Orbirhynchia : *Orbirhynchia parva*	100.5 - 93.9 Ma Late/Upper Cretaceous
Orbirhynchia wiesti species	7	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Basiliolidae : Orbirhynchia : *Orbirhynchia wiesti*	100.5 - 93.9 Ma Late/Upper Cretaceous
Ornithocheiridae family	5	Animalia : Chordata : Reptilia : Pterosauria : Ornithocheiridae	99.6 - 93.5 Ma Late/Upper Cretaceous
Plesiosauria unranked clade	99	Animalia : Chordata : Reptilia : Sauropterygia : Plesiosauria	100.5 - 93.9 Ma Late/Upper Cretaceous
Coniasaurus gracilodens species	7	Animalia : Chordata : Reptilia : Squamata : Dolichosauridae : Coniasaurus : *Coniasaurus gracilodens*	99.6 - 93.5 Ma Late/Upper Cretaceous

References

Pettitt N. E. (1954) Rhynchonellidae of the British Chalk, Rhynchonellidae of the British Chalk, Part II 107 466, 27-52

Delair J. B. (1960) The Mesozoic reptiles of Dorset. Part two, Proceedings of the Dorset Natural History and Archaeological Society 80, 52-90

Caldwell M. W. (1999) Description and phylogenetic relationships of a new species of Coniasaurus Owen, 1850 (Squamata), Journal of Vertebrate Paleontology 19 3, 438-455

Barrett P. M., Butler R. J., et al (2008) Pterosaur distribution in time and space: an atlas, Zitteliana B 28, 61-107

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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