sandstone : Idioms & Phrases
Argillaceous sandstone
(Geol.) , a sandstone containing much clay.
Webster 1913
Flexible sandstone
(Min.) , the finer-grained variety of itacolumite, which on account of the scales of mica in the lamination is quite flexible.
Webster 1913
Old red sandstone
(Geol.) , a series of red sandstone rocks situated below the rocks of the Carboniferous age and comprising various strata of siliceous sandstones and conglomerates. SeeSandstone , and the Chart ofGeology .
Webster 1913
Red sandstone
- a name given to two extensive series of British rocks in which red sandstones predominate, one below, and the other above, the coal measures. These were formerly known as the Old and the New Red Sandstone respectively, and the former name is still retained for the group preceding the Coal and referred to the Devonian age, but the term New Red Sandstone is now little used, some of the strata being regarded as Permian and the remained as Triassic. See the Chart of
Geology .