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Type: Journal article
Title: A middle-late Ediacaran volcano-sedimentary record from the eastern Arabian-Nubian shield
Author: Nettle, D.
Halverson, G.
Cox, G.
Collins, A.
Schmitz, M.
Gehling, J.
Johnson, P.
Kadi, K.
Citation: Terra Nova, 2014; 26(2):120-129
Publisher: Wiley
Issue Date: 2014
ISSN: 0954-4879
Statement of
David Nettle, Galen P. Halverson, Grant M. Cox, Alan S. Collins, Mark Schmitz, James Gehling, Peter R. Johnson and Khalid Kadi
Abstract: The Ediacaran Jibalah Group comprises volcano-sedimentary successions that filled small fault-bound basins along the NW–SE-trending Najd fault system in the eastern Arabian-Nubian Shield. Like several other Jibalah basins, the Antaq basin contains exquisitely preserved sedimentary structures and felsic tuffs, and hence is an excellent candidate for calibrating late Ediacaran Earth history. Shallow-marine strata from the upper Jibalah Group (Muraykhah Formation) contain a diversity of load structures and intimately related textured organic (microbial) surfaces, along with a fragment of a structure closely resembling an Ediacaran frond fossil and a possible specimen of Aspidella. Interspersed carbonate beds through the Muraykhah Formation record a positive δ13C shift from −6 to 0‰. U-Pb zircon geochronology indicates a maximum depositional age of ~570 Ma for the upper Jibalah Group, consistent with previous age estimates. Although this age overlaps with that of the upper Huqf Supergroup in nearby Oman, these sequences were deposited in contrasting tectonic settings on opposite sides of the final suture of the East African Orogen.
Description: Article first published online: 15 NOV 2013
Rights: © 2013 John Wiley & Sons Ltd
DOI: 10.1111/ter.12077
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Earth and Environmental Sciences publications

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