Publikationsdatum:
2012-10-22
Beschreibung:
The Late Cenomanian Hummar Formation was studied in three sections in north and central Jordan, at Aameriyya, northeast of Na’ur and the Wadi Haur areas. The base in the Aameriyya area is marked by a subaerial unconformity overlain by a calcrete and a paleokarstic horizon, separating the underlying Fuheis Formation marl from the overlying Hummar Formation limestone. The emergent Aameriyya area is interpreted to have been a paleohigh, as a response to tectonism, and a basin and swell topography is invoked for the Late Cenomanian carbonate platform in this region. The Hummar Formation is believed to form one complete depositional sequence; the calcrete-karst represents a lowstand systems tract, the overlying 2-m massive rudstone/floatstone represents the transgressive systems tracts (TST), and the cortoid grainstone/packstone with clinoforms the highstand systems tracts. The topmost miliolid limestone is probably the late highstand topset of the sequence, followed upwards by the TST of the Shueib Formation marl of the next sequence. The sequence boundary at the upper contact of the Hummar Formation can be correlated regionally whereas the sequence boundary at its base with subaerial exposure has not been reported elsewhere in Jordan, the Negev, or Sinai. Content Type Journal Article Category Original Article Pages 1-14 DOI 10.1007/s10347-012-0333-1 Authors Abdulkader M. Abed, Department of Geology, University of Jordan, Amman, 11942 Jordan Abdalla Abu Hamad, Department of Geology, University of Jordan, Amman, 11942 Jordan Hani Abul Khair, Department of Geology, University of Jordan, Amman, 11942 Jordan Ghazi Kraishan, Schlumberger Overseas, Data Consulting and Services, PO Box 8467, Doha, Qatar Journal Facies Online ISSN 1612-4820 Print ISSN 0172-9179
Print ISSN:
0172-9179
Digitale ISSN:
1612-4820
Thema:
Geographie
,
Geologie und Paläontologie
