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Milankovitch control of foraminiferal assemblages from the Cenomanian of southern England
Author(s) -
Leary P.N.,
Cottle R.A.,
Ditchfield P.
Publication year - 1989
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.1989.tb00402.x
Subject(s) - marl , geology , cenomanian , milankovitch cycles , carbonate , foraminifera , ecological succession , paleontology , pelagic zone , cyclostratigraphy , orbital forcing , oceanography , sediment , sedimentary rock , cretaceous , glacial period , structural basin , ecology , materials science , metallurgy , biology , benthic zone
A succession of foraminiferal assemblages recorded across three Cenomanian marl chalk‐marl rhythms is interpreted as a function of occasional high pelagic carbonate production induced by warmer surface waters. The changes in the benthonic assemblages are related to the introduction of increased amounts of carbonate sediment, Fluctuations in surface water temperature and associated productivity changes may be a consequence of orbital (precessional) forcing of the climate. Chalk formation is likely to have been much more rapid than marl formation.