arkose


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arkose

[′är‚kōs]
(petrology)
A sedimentary rock composed of sand-size fragments that contain a high proportion of feldspar in addition to quartz and other detrital minerals.

arkose

Sandstone containing 25% or more feldspar grains in abundance; used as building stone.
References in periodicals archive ?
CR0 mainly comprises banded sandstone, Upper Banded Shale, pink quartzite and shale marker, some dolomitic schist and micaceous arkose.
The Triassic arkose of the Connecticut River Valley, as well as occurrences in New Jersey and Pennsylvania, have been carefully studied and are well-known.
Arkose said that the lease is in Eastland County, Texas, and cover 277+/- acres.
Oliver Sherwood's Arkose has not been seen for just over a year, but seems to have been cut plenty of slack by the handicapper and, once rated 129 over hurdles, he gets in here off 110.
Arkose sandstone units are medium- to thick-bedded (50 cm to 90 cm), mainly light- brown to pinkish-white in colour, fine- to coarse-grained, poorly- to moderately-sorted, with grains that are sub- angular to sub-rounded.
Transported ores were blanketed with felsic pyroclastic rocks, and the grabens were subsequently filled and levelled with a rapid influx of arkose and basalt of the Sandy Lake Formation.
El Arpa Formation: [+ o -] 90 m of arkose derived from the Socle, sandy dolomite, quartzite, dolomitic limestone and fine grained sandstone.
28 Which southern hemisphere monolith is the world's most famous example of arkose sandstone geology?
Below this arkose member is a shale member where the ore deposits are found.
The subsiding New Jersey rift filled with shale, sandstone, and arkose, in places to a depth of 2,500 meters.
The primary target of the drilling was the Eocene Wind River Formation's Puddle Springs Arkose Member where uranium mineralization is found at depths of 250-350 feet, within a favorable sandstone environment.
Sandstones of Lumshiwal Formation fall into Sub Arkose to Arkose arenites on the basis of modal composition; few samples are classified as Lithic Arkose.