The document lists and describes various types of rocks. It describes plutonic igneous rocks like gabbrogranite and syenite. It also lists volcanic igneous rocks such as basalt, pumice, and obsidian. Several types of sedimentary rocks are provided for both detrital rocks like sandstone and conglomerate, and non-detrital rocks such as coal, limestone, and gypsum. Finally, it names various metamorphic rocks including foliated types like slate and schist as well as non-foliated marble and quartzite.