The Kasangulu site is an exposure in the upper part of a quarry (Societe Generale Industrielle, SGI) where arkosic sandstone
of the Inkisi Subgroup (Paleozoic) is extracted.
Porosity reduction and major controls on diagenesis of Cretaceous-Paleocene volcaniclastic and arkosic sandstone
, Middle Park Basin, Colorado.
Unlike at Petit Anse, however, at Alderney Point the unconformity is between arkosic sandstone
of the upper part of the Glenkeen Formation, overlain by angular boulder conglomerate of the Horton Group containing abundant clasts of the Glenkeen sandstone, both containing potassium feldspar.
The member was composed predominantly of coarse-grained, light-colored, cross-bedded arkosic sandstone
and minor boulder beds.
The reservoir consists of arkosic sandstone
including interbeds of siltstone and shale (claystone).
(1) with the conglomeratic arkosic sandstone
of the Chalky Buttes Member (CBM) of the Chadron Formation (White River Group), which is exposed at numerous buttes in the North Dakota-South Dakota-Montana tri-state area (2).
King (1990) described the stone as a medium- to thick-bedded, red, arkosic sandstone
having thin to medium interbeds of siltstone, mudstone, intraformational breccia, red conglomerate and green sandstone.
It is hosted within an upper Paleozoic, shallow marine, clastic sedimentary succession dominated by shale, siltstone, arkosic sandstone
, and fine pebble to cobble conglomerate.
Geologically, the mine area is quaternary alluvium, the overburden consisting predominantly of arkosic sand, arkosic sandstone
interbedded with tuffaceous clays, and caliche with cobble and boulder lenses.
The study site is underlain by carbon-rich shale and arkosic sandstone
of the Late Mississippian Horton Bluff Formation and the arenaceous sandstone of the Triassic Wolfville Formation.
Within the permit boundary the host sandstones for uranium mineralisation are the arkosic sandstone
units of the upper Paleocene Fort Union formation and lower sandstone units of the Eocene Wasatch formation.
Coarse red arkosic sandstone
a few metres thick at Miller Pond Road rests on a basement of Late Ediacaran rocks east of the basin.