Wikipedia
Latite is an igneous, volcanic rock, with aphanitic-aphyric to aphyric- porphyritic texture. Its mineral assemblage is usually alkali feldspar and plagioclase in approximately equal amounts. Quartz is less than five percent and is absent in a feldspathoid-bearing latite, and olivine is absent in a quartz-bearing latite. When quartz content is greater than five percent the rock is classified as quartz latite. Biotite, hornblende, pyroxene and scarce olivine or quartz are common accessory minerals.
Rhomb porphyries are an unusual variety with gray-white porphyritic rhomb shaped phenocrysts embedded in a very fine grained red-brown matrix. The composition of rhomb porphyry places it in the trachyte - latite classification of the QAPF diagram.
Latite is found, for example, as lavas in Bulgaria and as intrusive laccoliths and sills in South Dakota, USA.
Usage examples of "latite".
Many shafts were sunk at Table Mountain in Tuolumne County, going under thick layers of a basaltic volcanic material called latite before reaching the gold-bearing gravels.
In some cases, the shafts extended horizontally for hundreds of feet beneath the latite cap.
Snell by miners, who claimed that the jaw came from the gravels beneath the latite cap at Table Mountain in Tuolumne County.
Walton found a stone mortar, 15 inches in diameter, in gold-bearing gravels 180 feet below the surface and also beneath the latite cap.
In any case, the slate tablet was in fact discovered, with the mortar, in pre-volanic gravels deep under the latite cap of Tuolumne Table Mountain.
Whitney also reported discoveries that were made under intact volcanic layers at places other than under the latite cap of Tuolumne Table Mountain.
In any case, the slate tablet was in fact discovered, with the mortar, in prevolanic gravels deep under the latite cap of Tuolumne Table Mountain.