In a conventional automobile, these energy transformations are involved: 1  Chemical energy in the fuel converted to kinetic energy of expanding gas via combustion. 2  Kinetic energy of expanding gas converted to linear piston movement. 3  Linear piston movement converted to rotary crankshaft movement.
Rhyolite is an extrusive igneous rock with a very high silica content. It is usually pink or gray in color with grains so small that they are difficult to observe without a hand lens.Rhyolite is made up of quartz, plagioclase and sanidine, with minor amounts of hornblende and biotite.Trapped gases often produce vugs in the rock. These often contain crystals, opal or glassy material.t is usually pink or gray in color with grains so small that they are difficult to observe without a hand lens. Rhyolite is made up of quartz, plagioclase and sanidine, with minor amounts of hornblende and biotite. Trapped gases often produce vugs in the rock. These often contain crystals, opal or glassy material.
Being high in silica, rhyolite is a stiff lava that tends to have a banded appearance. Indeed, rhyolite means flow stone in scientific Greek. Rhyolite is typically found in continental settings where magmas have incorporated granitic rocks from the crust as they rise from the mantle.It tends to make lava domes when it erupts. See other examples of rhyolite in the gallery of volcanic rocks.he presence of phenocrysts means that rhyolite has a porphyritic texture. This rhyolite specimen, from the Sutter Buttes of northern California, has visible phenocrysts of quartz.