Qua-qua-versal Dip. The dip of beds to all points of the compass around a centre, as in the case of beds of lava round the crater of a volcano. Etym., quâ-quâ-versum, on every side.
Quartz. A German provincial term, universally adopted in scientific language for a simple mineral composed of pure silex, or earth of flints: rock-crystal is an example.
Quartzite or Quartz Rock. An aggregate of grains of quartz, sometimes passing into compact quartz.
Red Marl. A term often applied to the New Red Sandstone.
Reticulate. A structure of cross lines, like a net, is said to be reticulated, from rete, a net.
Rock Salt. Common culinary salt, or muriate of soda, found in vast solid masses or beds, in different formations, extensively in the New Red Sandstone formation, as in Cheshire; and it is then called rock-salt.
Rubble. A term applied by quarry-men to the upper fragmentary and decomposed portion of a mass of stone.
Ruminantia. Animals which ruminate or chew the cud, such as the ox, deer, &c. Etym., the Latin verb rumino, meaning the same thing.
Saccharoid, Saccharine. When a stone has a texture resembling that of loaf-sugar. Etym., σακχαρ, sacchar, sugar, and ειδος, eidos, form. Fig. 100.