Most of the volcanic rock and tephra is of basalt or basaltic andesite. These are conformably overlain by peperite and the basaltic and andesitic Lorne plateau lavas. The Griffith Canyon Member consists of basaltic and andesitic epiclastic volcanic breccias. The Bukidnon plateau is mainly of volcanic zone consisting of pyroclastic, basaltic and andesitic cones. The lower flanks consist of mostly basaltic and some andesitic lavas. Lastly, Vulcanian deposits are andesitic to dacitic rather than basaltic. The Mongolian Plateau has an area of basaltic lavas and volcanic cones. The cone is largely andesitic, though basaltic and dacitic rocks are present. Third, during a "climatic phase", copious flows of andesitic and basaltic lavas were erupted. The field consists of volcanic maars and basaltic scoria cones. Cinder cones most commonly occur as isolated cones in large basaltic volcanic fields. This may have formed from contractional cooling of basaltic lavas. The solubility of water is higher in rhyolite than in basaltic magma. The extensive lunar maria are composed of basaltic lava flows. Sulfur dioxide is usually possible to find in basaltic and rhyolite rocks.