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The AAPG/Datapages Combined Publications Database
Journal of Petroleum Geology
Abstract
Journal of Petroleum Geology, vol.
SECOND-ORDER SEQUENCE STRATIGRAPHY
OF THE PALAEOZOIC OF NORTH AFRICA
I. D. Carr*
*North Africa Research Group, Geology (BMS), Oxford Brookes University, Headington, Oxford OX3 0BP.
email: [email protected]
A synthesis of the sedimentology and sequence stratigraphy of the Palaeozoic
succession of North Africa is presented. Two chronostratigraphic correlation panels have
been constructed at roughly right angles to each other across North Africa, in WNW-ESE
and NNW-SSE orientations. The panels illustrate the way in which sedimentology and
hydrocarbon geology vary across the continent through time. The Palaeozoic succession is
divided into five second-order sequences (NA 1, Early Cambrian to Late Ordovician; NA 2,
Late Ordovician to Late Silurian; NA 3, Devonian; NA 4, Carboniferous; NA 5, Permian),
with sequence boundaries, maximum flooding surfaces and systems tracts being defined for
NA 1 to NA 4. Palaeogeographic reconstructions for the North African region from the
Cambrian to the Carboniferous are illustrated, and a sea-level curve based on the panels
and palaeogeographic reconstructions is compared to other published sea-level curves. The
proximity of the North African region to the South Pole during the Palaeozoic and its
relative tectonic stability suggest that sea-level curves derived from the area should closely
reflect Palaeozoic glacio-eustasy. This study may be used to investigate the occurrence of
reservoir, seal and source rocks away from areas of data control, and is intended to provide
a useful framework for future third-order studies.
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