TY - JOUR
T1 - Late Maastrichtian warming in the Boreal Realm: Calcareous nannofossil evidence from Denmark
AU - Sheldon, Emma
AU - Ineson, Jon
AU - Bown, Paul
PY - 2010/9/1
Y1 - 2010/9/1
N2 - The climate of the mid to Late Cretaceous was probably one of the
warmest of the Phanerozoic, but by the late Maastrichtian distinctly
cool high latitude regions had developed. Studies from low latitude
sites have demonstrated that the late Maastrichtian cooling was
punctuated by two pulses of warming, but the response of nannoplankton
to climatic fluctuation in the mid to high northern latitudes is not
well documented. A high-resolution nannofossil study was undertaken on
subsurface chalk sections of Denmark which provide a stratigraphically
complete record of late Maastrichtian sedimentation of nannofossil ooze
in an extensive mid to high latitude carbonate province. The
quantitative nannofossil data from cored sections through the upper
Maastrichtian chalk reveal subtle but significant shifts in taxa
interpreted as having been sensitive to temperature fluctuations (Arkhangelskiella cymbiformis, Kamptnerius magnificus, Lucianorhabdus cayeuxii, Nephrolithus frequens, and Watznaueria barnesiae),
and indicate two late Maastrichtian warming events correlatable with
those of low latitude records, and a decrease in surface water
temperatures in the latest Maastrichtian.
AB - The climate of the mid to Late Cretaceous was probably one of the
warmest of the Phanerozoic, but by the late Maastrichtian distinctly
cool high latitude regions had developed. Studies from low latitude
sites have demonstrated that the late Maastrichtian cooling was
punctuated by two pulses of warming, but the response of nannoplankton
to climatic fluctuation in the mid to high northern latitudes is not
well documented. A high-resolution nannofossil study was undertaken on
subsurface chalk sections of Denmark which provide a stratigraphically
complete record of late Maastrichtian sedimentation of nannofossil ooze
in an extensive mid to high latitude carbonate province. The
quantitative nannofossil data from cored sections through the upper
Maastrichtian chalk reveal subtle but significant shifts in taxa
interpreted as having been sensitive to temperature fluctuations (Arkhangelskiella cymbiformis, Kamptnerius magnificus, Lucianorhabdus cayeuxii, Nephrolithus frequens, and Watznaueria barnesiae),
and indicate two late Maastrichtian warming events correlatable with
those of low latitude records, and a decrease in surface water
temperatures in the latest Maastrichtian.
KW - Calcareous nannofossils
KW - Chalk
KW - Denmark
KW - Maastrichtian
KW - Palaeoclimate
UR - http://www.scopus.com/inward/record.url?scp=77955276027&partnerID=8YFLogxK
U2 - 10.1016/j.palaeo.2010.05.016
DO - 10.1016/j.palaeo.2010.05.016
M3 - Article
VL - 295
SP - 55
EP - 75
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
IS - 1-2
ER -