( n. )
A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name.
( n. )
A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012