|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
1 UENI, Shell Exploration and Production, 1 Altens Farm Road, Nigg, Aberdeen AB12 3FY, UK
2 Geological Institute, ETH-Zentrum, Sonneggstrasse 5, CH-8092 Zürich, Switzerland
3 Department of Earth Sciences, Oxford University, Parks Road, Oxford OX1 3PR, UK
4 Geological Institute, ETH-Zentrum, Sonneggstrasse 5, CH-8092 Zürich, Switzerland
The Fiq Member of the Ghadir Manqil Formation, Huqf Supergroup, Oman, is composed of 
1.5 km of glacial rainout diamictites, mass-flow deposits, turbiditic sandstones, and slope and shelf sandstones and siltstones, overlain by a classic <10-m-thick transgressive cap dolostone. Paleocurrents, facies distribution, and subsurface imagery show that the Fiq Member was deposited in a series of extensional half-grabens and grabens. Facies associations represent proximal glaciomarine, distal glaciomarine, nonglacial sediment gravity flow, and nonglacial shallow-marine siliciclastic depositional environments and processes. The member is divided into seven units that can be correlated across the rift basin. Although the facies mosaic is complex, cycles of relative sea-level change, most likely driven by glacio-eustasy, show that glacial advance and retreat during the glacial epoch was strongly pulsed. Only the final (youngest) diamictite is overlain by a well-developed cap carbonate. It is unlikely that there was any prolonged and substantial shutdown of the hydrologic cycle during deposition of the Fiq Member. On the basis of sedimentological and stratigraphic data, the Neoproterozoic glacials of Arabia were more like the familiar oscillatory glaciations of the Pleistocene than those required by the snowball Earth hypothesis.
Key Words: Neoproterozoic • Oman • glaciations
This article has been cited by other articles:
|
|
 |
|
  T. Bechstadt, H. Jager, G. Spence, and G. Werner Late Cryogenian (Neoproterozoic) glacial and post-glacial successions at the southern margin of the Congo Craton, northern Namibia: facies, palaeogeography and hydrocarbon perspective Geological Society, London, Special Publications, January 1, 2009; 326(1): 255 - 287. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y. F. Zheng, B. Gong, Z. F. Zhao, Y. B. Wu, and F. K. Chen Zircon U-Pb age and o isotope evidence for neoproterozoic low-18O magmatism during supercontinental rifting in South China: Implications for the snowball earth event Am J Sci, April 1, 2008; 308(4): 484 - 516. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Micheels and M. Montenari A snowball Earth versus a slushball Earth: Results from Neoproterozoic climate modeling sensitivity experiments Geosphere, April 1, 2008; 4(2): 401 - 410. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. J. Pazos, L. S. Bettucci, and J. Loureiro The Neoproterozoic glacial record in the Rio de la Plata Craton: a critical reappraisal Geological Society, London, Special Publications, January 1, 2008; 294(1): 343 - 364. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 I. J. Fairchild and M. J. Kennedy Neoproterozoic glaciation in the Earth System Journal of the Geological Society, September 1, 2007; 164(5): 895 - 921. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. RIEU, P. A. ALLEN, A. COZZI, J. KOSLER, and F. BUSSY A composite stratigraphy for the Neoproterozoic Huqf Supergroup of Oman: integrating new litho-, chemo- and chronostratigraphic data of the Mirbat area, southern Oman Journal of the Geological Society, September 1, 2007; 164(5): 997 - 1009. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 W. B. HARLAND Origins and assessment of snowball Earth hypotheses Geological Magazine, July 1, 2007; 144(4): 633 - 642. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. Rieu, P. A. Allen, M. Plotze, and T. Pettke Climatic cycles during a Neoproterozoic "snowball" glacial epoch Geology, April 1, 2007; 35(4): 299 - 302. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Kendall, R. A. Creaser, and D. Selby Re-Os geochronology of postglacial black shales in Australia: Constraints on the timing of "Sturtian" glaciation Geology, September 1, 2006; 34(9): 729 - 732. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. Jiang, M. J. Kennedy, N. Christie-Blick, H. Wu, and S. Zhang Stratigraphy, Sedimentary Structures, and Textures of the Late Neoproterozoic Doushantuo Cap Carbonate in South China Journal of Sedimentary Research, July 1, 2006; 76(7): 978 - 995. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 P. F. Hoffman 28th DeBeers Alex. Du Toit Memorial Lecture, 2004. On Cryogenian (Neoproterozoic) ice-sheet dynamics and the limitations of the glacial sedimentary record South African Journal of Geology, December 1, 2005; 108(4): 557 - 577. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. P. Halverson, P. F. Hoffman, D. P. Schrag, A. C. Maloof, and A. H. N. Rice Toward a Neoproterozoic composite carbon-isotope record Geological Society of America Bulletin, September 1, 2005; 117(9-10): 1181 - 1207. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. J. Peterson, M. A. McPeek, and D. A. D. Evans Tempo and mode of early animal evolution: inferences from rocks, Hox, and molecular clocks Paleobiology, June 1, 2005; 31(2_Suppl): 36 - 55. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Kilner, C. Niocaill, and M. Brasier Low-latitude glaciation in the Neoproterozoic of Oman Geology, May 1, 2005; 33(5): 413 - 416. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Cozzi, J. P. Grotzinger, and P. A. Allen Evolution of a terminal Neoproterozoic carbonate ramp system (Buah Formation, Sultanate of Oman): Effects of basement paleotopography Geological Society of America Bulletin, November 1, 2004; 116(11-12): 1367 - 1384. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. G. Smith, A. G. SMITH, and K. T. PICKERING Oceanic gateways as a critical factor to initiate icehouse Earth Journal of the Geological Society, May 1, 2003; 160(3): 337 - 340. [Abstract] [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
