Based on Dunham (1962) classification two microfacies, mudstone and wackestone were identified and based on the recorded fauna and depositional fabric, seven sub-microfacies were interpreted including Algal-bioclastic mudstone (MF1), Miliolid-nummulitic mudstone (MF2), Miliolid mudstone (MF3), Unfossiliferous
mudstone (MF4), Miliolid wackestone (MF5), Bioclastic wackestone (MF6) and Nummulitic-miscellanea wackestone (MF7).
This unit is unfossiliferous
, although its suggested equivalent in Belarus, the Lyozno Regional Stage, contains an acritarch assemblage that differs considerably from the assemblages in the overlying strata (Kruchek et al.
The Utrillas Formation consists of continental to marginal marine, unfossiliferous
sandstones with some intercalated mudstones and conglomerates.
The sediments those are present in the Dhok Pathan Formation grade down through a considerable thickness of unfossiliferous
beds into the Nagri beds (Khan et al., 2014).
In its middle part greenish grey to grayish shale has two interclations of thin bedded arenaceous unfossiliferous
limestone and one medium bedded poorly fossiliferous limestone.
The lower part of the Hangu Formation is predominantly laterite / bauxite / kaolinite lithofacies-I, which is overlain by lithofacies-2 (shales / clays), lithofacies-3 (shales, siltstone and sandstone), lithofacies-3a (unfossiliferous
limestone), lithofacies-4 (fine-grained sandstone) and lithofacies-5 (arenaceous, bioclast supported limestone).
Hunting Geology and Geophysics, Ltd, 1979; Hamdan and El-Deeb, 1990; Hamdan and Anan, 1993; Whittle and Alsharhan, 1994)..The Upper Cretaceous sequence includes (from base to top): Semail ophiolites (serpentine andserpentinized predotite), the oldest exposed rocks in Al-Ain area, Qahlah Formation (red and yellow Unfossiliferous
clast-supported conglomerates of serpentized predotite, derived from the Semail ophiolites, Simsima Formation (marine bioclastics limestones with rudists, corals and echinids, it is disconformably overlies the Qahlah Formation (Hamdan and Anan, 1993).
Although Dorr and Eschman (1970) reported the gypsum as being unfossiliferous
, within the gypsum in unit 2 we have found small, nodular masses with laminae that could be of algal origin.
The loess is unfossiliferous
. But contains numerous concretions referred to as "loess dolls".
(4) 0.15 m--light grey, microcrystalline, pure, unfossiliferous
Robb collected brachiopods at one locality (herein, the Rocky Brook locality) within this extensive unfossiliferous
area and they were interpreted as Silurian-Devonian of the Gaspe Limestone series (Billings in Robb 1870, p.
, medium to fine grained sandstones of the Paluxy are replaced by limestones of the Walnut containing abundant Peruviella dolium.