organic-rich strata in North Africa
Lower Frasnian black shales have been deposited in many parts
of North Africa and form an important hydrocarbon source rock in this
region with TOC values of up to 14% (Boote et al. 1998). Little is published
about Frasnian organic-rich strata, because most information from exploration
activities remains confidential. A synthesis has been recently compiled
by Luning et al. (in press).
black shales in the Ahnet Basin (Central Algeria)
Frasnian black shales are exposed at the southern flanks
of the Ahnet Basin. Contact with the underlying Givetian is particularly
well exposed in the following seven sections. Click on the sections
for a selection of field photographs. Horizon numbers refer to a manuscript
submitted to Sedimentary Geology.