Location Close to Jabal Misht
Time 08:30 a.m. – 05:00 p.m.
GPS coordinates (Latitude/Longitude) 23° 14.920'N 56° 57.148'E
Figure 1: A visual representation of the study area (marked with a green arrow) on a road map. (Google, 2013).
The field trip to Ibri took place on the 11th of November and was conducted by Dr. Celiné Ducassou. Ibri is part of the A’Dhahira region. The outcrop that was visited lies 50 km east of Ibri and 3 km west of Jabal Misht. The study area has pointed out on a road map in Figure 1.
Figure 2: The localization of the study area on the geological map of Ibri (modified after Janjou et al. 1986 Google, 2013).
The study area has also been localized on a geological map in Figure 2. This field excursion was related to the turbidites of the Matbat Formation and the main aim of this trip was to log the sedimentary series, measure the paleocurrent and to perform paleocurrent analysis. Such analysis would help in understanding and interpreting the paleoenvironment.
After arrival on the site, a brief introduction to the geology of the vast area was done by Celiné Ducassou.
Oman has such an immense geological history. The order of the major rock units in Oman are (from old-young):
Autochthonous A – Autochthonous B – Hawasina Nappe – Samail Nappe
At first, there was the deposition of Autochthonous A unit which was followed by Autochthonous B and these two units were separated by an unconformity. Later, the Hawasina Nappe was thrusted over the two units. In Late Cretaceous, Samail Nappe was thrusted (obducted) over the Hawasina Nappe.
Every rock group has a different depositional environment. For example, the Kawr group represents the Oman Exotics and is composed of distal sediments (chert). Closer t...
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Lowe, D.R. (1982). Sediment gravity flows: II. Depositional models with special reference to the deposits of high-density turbidity currents. J. Sed. Petrol., 52, 279-297.
Minoux, L. and Janjou, D. (1986). Geological map of Ibri, Sheet NF 40-2F, Scale 1:100,000, Explanatory Notes. Ministry of Petroleum and Minerals, Oman: Directorate General of Minerals.
Mutti, E. and Davoli, G. (1992) – Turbidite Sandstones. AGIP, Instituto di geologia, Università di Parma, 275 p.
Shanmugam, G. (2000). 50 years of turbidite paradigm (1950s - 1990s): deep-water processes and facies models- a critical perspective. Marine and Petroleum Geology, 17, p. 477-512.
Stow, D.A.V. and Shanmugam, G. (1980). Sequence of structures in fine-grained turbidites: comparison of recent deep-sea and ancient flysch sediments. Sedimentary Geology, 25, 23-42.