Interpretation of controls on sandbody architecture in
continental settings is challenging because changes in tectonics, climate, and
sea level can produce very similar architecture. Using a newly recognized
fluvial style which represents the deposits of strongly seasonal river systems,
Allen et al. interpret the record of
climate change (variable precipitation and runoff regimes) as manifested by in
the internal architecture of sandbodies in Mississippian–Permian strata of the
Cumberland Basin, Atlantic Canada. Despite the tectonically-active setting of
the basin, a coherent climate signal can be deconvolved from the tectonic and
eustatic effects on the stratigraphic architecture. The suggestion that
climatic factors exerted a primary control on basinal architecture runs counter
to many previous interpretations which have tended to stress tectonic and
eustatic controls.
Deconvolving signalsof tectonic and climatic controls from continental basins: an example from thelate Paleozoic Cumberland Basin, Atlantic Canada by Jonathan P. Allen,
Christopher R. Fielding, Michael C. Rygel, and Martin R. Gibling
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