TY - JOUR
T1 - Echinoid distribution and sequence stratigraphy in the Cenomanian (Upper Cretaceous) of southern England
AU - Smith, Andrew B.
AU - Monks, N.
AU - Gale, Andy
PY - 2006
Y1 - 2006
N2 - Almost 3500 individual occurrences of echinoid have been recorded and correlated against a sequence stratigraphie framework for the entire Cenomanian and basal Turonian from three regions of southern England, representing onshore, mid-shelf and deeper-shelf habitats. There are marked differences in the composition and diversity of faunas both across the shelf at a single time interval and through time at the same locality, driven primarily by factors such as sedimentary facies, which are controlled by changing sea-levels. The ranges of individual taxa expand and contract across the shelf as sea-levels change. In mid-shelf environments more onshore taxa appear only near sequence bases, at times of lowest sea-level, while those from more outer shelf settings are found during highstand intervals, and this creates a cyclical pattern of diversity. By comparison with modern faunas, the Middle and Upper Cenomanian of the Sussex coast is likely to have been deposited in water depths of between 100 m and 150 m and the amplitude of sea-level change appears to increase through the Cenomanian.
AB - Almost 3500 individual occurrences of echinoid have been recorded and correlated against a sequence stratigraphie framework for the entire Cenomanian and basal Turonian from three regions of southern England, representing onshore, mid-shelf and deeper-shelf habitats. There are marked differences in the composition and diversity of faunas both across the shelf at a single time interval and through time at the same locality, driven primarily by factors such as sedimentary facies, which are controlled by changing sea-levels. The ranges of individual taxa expand and contract across the shelf as sea-levels change. In mid-shelf environments more onshore taxa appear only near sequence bases, at times of lowest sea-level, while those from more outer shelf settings are found during highstand intervals, and this creates a cyclical pattern of diversity. By comparison with modern faunas, the Middle and Upper Cenomanian of the Sussex coast is likely to have been deposited in water depths of between 100 m and 150 m and the amplitude of sea-level change appears to increase through the Cenomanian.
U2 - 10.1016/S0016-7878(06)80010-6
DO - 10.1016/S0016-7878(06)80010-6
M3 - Article
SN - 0016-7878
VL - 117
SP - 207
EP - 217
JO - Proceedings of the Geologists' Association
JF - Proceedings of the Geologists' Association
IS - 2
ER -