<span>Rhyolite is formed when rhyolitic
magma explodes, or if crystallization occurs when the rhyolitic magma is
deeply buried. Rhyolite is high in silica, and it is typically found as
ash deposits, in shiny forms, such as obsidian, or in lightweight
forms, including pumice and perlite.</span>
A family of orientation refers to the family into which a person is born. A family of procreation describes one that is formed through marriage. These distinctions have cultural significance related to issues of lineage.
