The siliciclastic beds outcropping around the village of Kuhlan, northwest Yemen\ud were originally designated the Kohlan Series. Later the sandstone part of the sequence\ud was renamed the Kuhlan Formation by the Yemeni Stratigraphic Commission. The\ud lower part of the Kuhlan Formation (Unit A) yielded diverse and well preserved\ud palynological assemblages. Their quantitative character and the presence of\ud Anapiculatisporites concinnus, Brevitrietes cornutus, B. parmatus, Deusilities tentus,\ud Dibolisporites disfacies, Microbaculispora tentula, Spelaeotriletes triangulus and\ud Verrucosisporites andersonii, suggests a confident correlation to the 2165A to 2141A\ud biozones of southern Oman, and to Arabian OSPZ2, indicating a late Carboniferous to\ud earliest Permian age for the unit rather than the late Triassic to early Jurassic age\ud given on the geological map of western Yemen. The date for the lower Kuhlan\ud Formation indicates that the underlying Akbra Formation is probably not younger\ud than the 2165A Biozone and therefore likely to be equivalent to the lower parts of the\ud Al Khlata Formation of Oman
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