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Cyclic sedimentation patterns in Lower Lias mudstones of Yorkshire (GB)
Author(s) -
Buchem F.S.P.,
McCave I.N.
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.tb00411.x
Subject(s) - geology , sedimentary depositional environment , facies , paleontology , submarine pipeline , tectonics , sedimentation , sequence (biology) , stratification (seeds) , sea level , geomorphology , geochemistry , oceanography , sediment , seed dormancy , botany , germination , structural basin , dormancy , biology , genetics
Distinct stratification patterns in Lower Liassic mudstones are due to the regular occurrence of shell beds, silty/sandy layers and concretionary horizons. The mudstones formed in four depositional environments: (1) a storm dominated shallow marine system; (2) a hemipelagic system; (3) a shallow marine system influenced by climatic changes at astronomical frequencies; and (4) a pro‐deltaic offshore transition/shallow marine system. The tectonic setting played an important role in determining the facies sequence, whereas eustatic sea‐level changes were of lesser influence.