Definition of arkose in English:

arkose

Syllabification: ar·kose
Pronunciation: /ˈärˌkōs
 
/

noun

Geology
A coarse-grained sandstone that is at least 25 percent feldspar.
More example sentences
  • The matrix ranges from sandstone to arkose, and is frequently just fine-grained conglomerate.
  • Ghanem et al. referred to the Hammamat Group as molasse-type sediments that consist of polymictic conglomerate, arkose, greywacke, siltstone and minor mudstone.
  • Conglomerate clasts are principally volcanic rocks and greenish gray chert, with subordinate arkose, graywacke, siltstone, red chert, quartzite, white quartz, and limestone.

Origin

mid 19th century: from French, probably from Greek arkhaios 'ancient'.

Derivatives

arkosic

Pronunciation: /ärˈkōsik/
adjective
More example sentences
  • The rocks typically comprise a monotonous sequence of greywackes, reddish-weathering arkosic sandstones, shales and subordinate conglomerates.
  • During this study, however, chlorite associated with the final stages of deformation has been identified in the limestone and arkosic sandstone of the Timirovo thrust system.
  • The upper part is more sandy, containing clean, arkosic, sharp-based sandstones up to 50 cm thick with locally matrix-supported conglomeratic bases.

More definitions of arkose

Definition of arkose in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day crowdsource
Pronunciation: ˈkroudˌsôrs
verb
obtain (information) by enlisting help of many people…