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).
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).
The aquifer is composed of arkosic sandstones containing siltstone and shaly layers.
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 (Jambor 1971a).
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.
It is hosted within an upper Paleozoic, shallow marine, clastic sedimentary succession dominated by shale, siltstone, arkosic sandstone, and fine pebble to cobble conglomerate.