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Tectonic significance of the Avroman Formation: confirmation of Glennie et al.’s (1974) model from Kurdistan Region of Iraq

Laura Davies1, Ágoston Sasvári1, and Andrew Mann1

1Robertson, Llandudno, United Kingdom


Close to Zalm Village in the Avroman Mountains of Northern Kurdistan, a deformed sequence of the Megalodontaceae-bearing Upper Triassic limestones crops out. The Triassic section is dramatically folded, and thrusted on the younger Mesozoic Qulqula Formation.

The uppermost half of the Avroman Formation is a massive, thick bedded, Megalodontaceae-bearing, white to light grey, light yellowish limestone. Complete Megalodontaceae and a significant number of Megalodontaceae fragments were found, indicative of a subtidal platform or platform edge (e.g. Hauer, 1853; Gümbel, 1862). The lower half of this unit comprises a thinner (~10-20 cm), well bedded, medium grey limestone with small scale spherical grains, ooids, oncoids or peloids with no macroscopic fossils.


AAPG Search and Discovery Article #90188 ©GEO-2014, 11th Middle East Geosciences Conference and Exhibition, 10-12 March 2014, Manama, Bahrain