arkosic


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Related to arkosic: bioclastic, arkosic wacke

arkosic

[är′kōs·ik]
(petrology)
Having wholly or partly the character of arkose.
References in periodicals archive ?
Frac sand that is referred to as "Brown" or "Brady" sand Is mined from local quartz arenites that are in the marine subarkosic to arkosic Upper Cambrian Hickory Sandstone Member (Kyle and McBride, 2014).
Geologically, the project area is dominated by arkosic sediments, minor conglomerates and non-outcropping ultramafics (interpreted from aeromagnetics).
The "sandstone facies' is characterized by medium- to very coarse-grained subarkosic to arkosic arenite interbedded with laminated siltstone and sandstone with sedimentary structures that indicate deposition in tidal and sub-tidal areas and shoals.
The siltstones are arkosic, have very angular grains, and apparently represent immature volcanic sediments.
The geology is relatively simple, as the Danau Sentarum area consists largely of recent deposits, together with outcroppings of arkosic sandstone (Molengraaff, 1901; Giesen, 1987).
At this site, uranite and yellow secondary uranium minerals occur in a Teritary bentonitic tuff which is arkosic and carbonaceous near its base, overlying a quartz monzonite.
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.
The second, more common in the southern Negev and in southwestern Jordan, is the arkosic surfaces, where crystals project, are easy to remove, and thus leave depressions at the surface.
They include disseminations in sandstone and conglomerate, along arkosic lamellae in siltstone, and in thermal aureoles of the lamprophyric dykes related to the volcanic units.
Clasts in the lowermost part of the Horton Group in the sampled section include mafic rocks and large angular clasts of arkosic sandstone which appear to be derived from the underlying Glenkeen Formation but those clasts do not persist into the central part of the section (E.
Uranium was leached from a Late Cretaceous alkalic quartz monzonite and deposited in roll-fronts mode within a reducing environment of Paleocene, arkosic, carbonaceous conglomerates and sandstones of the Boulder Creek Basin.