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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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Within the past few years, there has been an active petroleum exploration and development program in Triassic sandstone of the northwestern Algerian Sahara. This stratigraphic unit has not been named formally, and no significant fossils have been found in the 150,000-sq km area involved in the program. From the limited data available, analysis of sedimentologic characteristics, correlation, and stratigraphic relations indicate that the Lower Triassic sandstone in the northwest part of the Algerian Sahara was deposited on a post-Hercynian erosion surface. Some variation in thickness, 0-200 m, is related to irregularities in the Paleozoic erosion surface, and an apparent shoreline is indicated by nondeposition. Sediments are believed to have been derived from local folds, s ch as the eroded Hassi Messaoud anticline, and from broader uplifts in north-central Algeria.
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