![Bulletin of the British Museum (Natural History), Geology. 2. The Anglian Trough In this area the base of the Lower Chalk is represented by the Cambridge Greensand (Hart 1973a). Detailed microfaunal Bulletin of the British Museum (Natural History), Geology. 2. The Anglian Trough In this area the base of the Lower Chalk is represented by the Cambridge Greensand (Hart 1973a). Detailed microfaunal](https://c8.alamy.com/comp/RGHT6D/bulletin-of-the-british-museum-natural-history-geology-2-the-anglian-trough-in-this-area-the-base-of-the-lower-chalk-is-represented-by-the-cambridge-greensand-hart-1973a-detailed-microfaunal-analysis-has-shown-that-the-age-of-the-cambridge-greensand-is-upper-zone-8-uppermost-hypoturrilites-carcitanensis-assemblage-zone-of-kennedy-1969-even-though-the-only-dateable-macrofaunal-elements-are-from-the-dispar-zone-the-underlying-gault-clay-belongs-on-microfaunal-grounds-to-the-arrhaphoceras-substuderi-subzone-of-the-dispar-zone-this-shows-that-the-upper-part-of-the-dispar-zone-is-n-RGHT6D.jpg)
Bulletin of the British Museum (Natural History), Geology. 2. The Anglian Trough In this area the base of the Lower Chalk is represented by the Cambridge Greensand (Hart 1973a). Detailed microfaunal
![Fossil, bivalve, Pecten beaveri, collected at Alton, Hampshire, in Lower Chalk, from Cenomanian, Gallic, Cretaceous period Fossil, bivalve, Pecten beaveri, collected at Alton, Hampshire, in Lower Chalk, from Cenomanian, Gallic, Cretaceous period](https://collections.hampshireculture.org.uk/sites/default/files/styles/max_325x325/public/objects/xDPABOW44.jpg,qitok=M1377x_O.pagespeed.ic.UjTk18vjX_.jpg)
Fossil, bivalve, Pecten beaveri, collected at Alton, Hampshire, in Lower Chalk, from Cenomanian, Gallic, Cretaceous period
![On a Peculiar Bed of Angular Drift on the Lower-chalk High Plain Between Upton and Chilton: Amazon.co.uk: Prestwich, Joseph Sir 1812-1896, Geological Society of London: 9781372089930: Books On a Peculiar Bed of Angular Drift on the Lower-chalk High Plain Between Upton and Chilton: Amazon.co.uk: Prestwich, Joseph Sir 1812-1896, Geological Society of London: 9781372089930: Books](https://m.media-amazon.com/images/I/51iESNu9YnL._AC_UF894,1000_QL80_.jpg)