Benthic macrofauna variations and community structure in Cenomanian cyclic chalk–marl from Southerham Grey Pit, SE England

: null Cenomanian chalk–marl couplets from England represent the 20 ka Milankovitch precession cycle. Fossil communities from both chalk and marl are identified to test if the orbital fluctuations and the associated changes in substrate lithology and climate exerted any control on the benthic macrofauna. The material comprises washing residues of 24 bulk samples collected from chalk and marl half-cycles. A total of 5055 invertebrate specimens...