Rhyolite.
volcanic rocks
Basalt fits the above description.
Hmm well not really anonther name as such. if the sand is particulary high in a minerla you could name it thus. In the case of a high silica sand i'd be inclined to call it a quartz sand.
There is no scientific name per se for a rice hull.However, according to Wikipedia:"To protect the seed during the growing season, the hull is made of hard materials, including opaline silica and lignin.... The very high content in amorphous silica of the hulls confer to them and to their ash (SiO2 ~ 20 wt.%) after combustion very valuable properties."
Silicon dioxide is silica, SiO2.
name three volcanic mountains in Washington
VOLCANIC ASH, VOLCANIC CINDERS, VOLCANIC BLOCKS & VOLCANIC BOMBS.
Salton Sea in southern California
volcanic pyroclastic = 'a'ā
The name of the island of Kiribati that is volcanic is the Leeward Islands.
bright steel gets its name from its appearance, due to the high carbon content.
pyroclastic flow