This classification shows that the majority of samples are classified as quartz arenite
, few samples from the sediments of core I are plotted in the field of Fe-sands and a single sample from core II is classified as sublitharenite (Fig.
The presence of glauconite and bioclastic limestone beds within the Lumshiwal Formation in the Nizampur Basin confirms the shallow marine inner ramp depositional environment and the presence of planer bedded quartz arenite
lithofacies suggests deposition of this part of the Lumshiwal Formation in the intertidal setting (Table 1).
In extreme western Wisconsin, the Van Oser is known as a medium- to coarse-grained, well-rounded quartz arenite
that is thick bedded, contains cross bedding and calcareous concretions, and is easily disaggregated, with a thickness of around 45 ft.
The adjacent lithologies of the Horton Group vary from fine-grained, typically micaceous, quartz arenite
to conglomerate or breccia.
A logarithmic plot of Na2O/K2O and SiO2/Al2O3 ratios of 20 samples of lithofacies-3 and 4 of the Hangu Formation showed that the lithofacies were predominantly quartz arenite
with subordinate quartz litharenite to sub-litharenite (Fig.
2000) resulted in recognition of the first-reported occurrences in Canada of quartz arenite
containing stromatolites and biofilm structures (Fig.
According to Folk's (1980) classification, 80% of the plots fall under Quartz arenite
field whereas 20% falls in the Sub-lithiarenite field (Fig.5).
The magaripples occur on the upper bedding plane of a 35-cm thick, medium to coarse-grained quartz arenite
. This bed is both underlain and overlain by fine quartz sandstone, interbedded with micaceous siltstone beds, some of which preserve a well-developed Cruziana ichnofacies association.
The petrographic studies indicate four microfacies namely Pelagic Mudstone, Orbitoidal Wackestone, Quartz Arenite
and Quartz Wacke.
The Liard Formation is mainly a calcite-cemented, fine- to medium-grained, well- to sub-rounded to sub-angular, 90 percent quartz arenite
of marine shoreface origin (Hickin and others, 2010).
The Gowganda Formation is conformably overlain by the Lorrain Formation, which has a maximum observed thickness in excess of 300 m and is cut by an erosional surface; this thickness includes only the lower arkosic unit and not the overlying quartz arenite