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 ?
Arkose said that the lease is in Eastland County, Texas, and cover 277+/- acres.
Geologic characteristics of the area correspond to arkose deposits coming from granite and gneisses erosion, basis of the Sierra de Guadarrama.
Arkose is bidding to win this and I think he has a good chance of landing it in the qualifier for the Pertemps Network Handicap Hurdle.
ARKOSE: has really turned a corner and could be on the way to the Pertemps at Cheltenham in March
Lithotypes within the lower and upper volcanic assemblages are similar, except for the presence in the lower assemblage of basal conglomerate and arkose (Lynch 1991).
Mineralisation at Area 5 North is associated with narrow quartz veins within an arkose host and significantly, xenotime also occurs finely disseminated within the host arkose unit.
So I'm hopeful of a good run, although Oliver Sherwood's ARKOSE looks the one to beat.
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).
20 The geology of which spectacular sacred site is technically known as mutitjulu arkose?
The Unicoi Formation contains basalt flows in its basal units but largely consists of immature conglomerate, arkose and sub-arkosic arenite (Rodgers, 1953).
Francis Mountain rhyolite (fine to coarse-grained; pink, red, green, gray; massive or flow banded, pebble to cobble size), Keokuk geodes (cauliflower cherts lined inside with rock crystal quartz, quartz druse, or chalcedony; pebble to large cobble size), sandstone (fine to coarse-grained; white, pink, red, green, gray; cobble to boulder size; some sandstones are loosely cemented as a result of quartz overgrowths displaying prismatic crystal faces on individual grains and commonly containing authigenic feldspars), Arkose and weathered granite (pink, coarse-grained, pebble to cobble size, very rare), quartz (milky, pink, clear, gray; pebble to large cobble size).