ARKOSE Meaning and
Definition
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Arkose is a type of sedimentary rock characterized by its composition and texture. Composed mainly of quartz grains, feldspar, and other minerals, arkose often forms from the erosion and weathering of granitic rocks. This rock type is typically found in areas with high-energy environments such as riverbanks, alluvial plains, and beaches.
In terms of appearance, arkose exhibits a coarse-grained texture due to the relatively large size of its constituent minerals. The quartz grains are usually well-rounded or sub-rounded, indicating prolonged transportation and weathering. The feldspar grains are often pink or reddish in color, lending arkose a distinct hue. Other minerals present in arkose may include clay minerals, mica, and lithic fragments.
Given its mineral composition, arkose is considered a detrital sedimentary rock. The presence of robust quartz grains and feldspar distinguishes arkose from other sedimentary rocks like sandstone or conglomerate. Arkose often contains less than 25% matrix or cement, allowing it to be friable or loosely bound. This characteristic differentiates it from more consolidated sedimentary rocks.
Due to its durability and resistance to weathering, arkose can be a valuable construction material. It has been utilized in building foundations, road aggregates, and even as a decorative stone. Geological studies of arkose can provide insights into past geologic processes, as deposition in high-energy environments suggests the presence of ancient river systems or coastal areas. Overall, arkose serves as a significant indicator of past sedimentary environments while also being a versatile and utilitarian rock.
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A mineral compound formed of the same materials as granite, from the disintegration of which it has evidently been derived.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for ARKOSE
Etymology of ARKOSE
The word "Arkose" has its roots in the French language. It is derived from the French word "arcose" which in turn comes from the Greek word "arkos" meaning "weak" or "feeble". This refers to the relatively weak or poorly cemented nature of this sedimentary rock type. Arkose is predominantly composed of sand grains containing a high percentage of feldspar minerals.
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