5.the commonest type of solidified lava; a dense dark gray fine-grained igneous rock composed chiefly of calcium-rich plagioclase feldspar and pyroxene.
6.Within massive sandstone outcrops, above comparatively dense forest, are five clusters of natural rock shelters, displaying paintings that appear to date from the Mesolithic Period right through to the historical period.
7.evergreen perennial having a dense basal rosette of long spatula-shaped leaves and panicles of pink or white-and-red-striped or pink-purple flowers; found on cliffs and in rock crevices in mountains of southwestern Oregon and northern California.
