Float blocks of conglomeratic
sandstone from basal 4.5-6.0 m (15-20 ft) of member, near 533 m (1750 ft.) elevation at bottom of eastern tributary to Fremont Canyon, center of SW 1/4 SW 1/4 sec.
The Turtle Butte Formation was deposited by a meandering stream system evident by sandy siltstone and claystone floodplain deposits and conglomeratic
The base of the Jbel Lmgaysmat Formation is underlined by an erosive discontinuity marked by conglomeratic
to coarse-grained sandstones rich in rhyolitic gravels (Destombes et al.
Coarse and conglomeratic
sandstones, locally rather thick, are minor lithologies (Washburne, 1930; Soares, 1972; Massoli, 1980; Fulfaro et al., 1984; Stevaux et al., 1986; Assine et al., 2003; Holz et al., 2010; Chahud, 2011; Chahud et al., 2012).
lags composed of intraformational clasts (mud chips, concentrically laminated caliche nodules, and siderite nodules) with subordinate amounts of extraformational material (fragments of igneous, metamorphic, and sedimentary rock) commonly line erosional surfaces in multistorey channel bodies (Figs.
to the Lower conglomeratic
Unit) and in the retrogradational stage as a fan delta, resulting in a marine transgression (transition to the shallow marine carbonate facies).
The area under consideration has the geological characteristics of a recently formed valley, with slightly consolidated conglomeratic
and sandy alluvial deposits of the Calabrian epoch.
The Warchha Sandstone is composed of light-pink, red, reddish-brown and white-coloured fine-to coarse-grained sandstone, which is conglomeratic
in places and has interbeds of siltstone and claystone.
The Ulukicla Formation near the town of Nigde is of a lacustrine origin of Paleocene to Eocene Age underlying conglomeratic
Therefore the conglomeratic
rock unit represents potentially a very large deposit.Iron mineralisation can be seen in visible concentrations of iron, which assay up to 63% Fe in rock chips, occur mostly on the west faulted boundary where fluids may have been able to circulate, dissolve and concentrate iron through dissolution and re-precipitatation in the matrix between the boulders.The basal unit also appears to have a greater concentration of Haematite boulders within the conglomerate with grades commonly in the 25-35% Fe range.Such concentrations could also occur elsewhere within this substantial rock unit.Dynasty collected several bulk chip samples from the prospect to determine the average iron content.
They are overlain by a series of poorly sorted sediments, dominantly conglomeratic
, which represent the Westphalian D to the Stephanian A (ca.
Late Eocene sandstone exposed at the Medicine Pole Hills (MPH) in southwestern North Dakota (11 km south of Rhame) is a conglomeratic
arkose that unconformably overlies the Paleocene Tongue River Formation (Fort Union Group).