basalt alkalin, boninite, basalt alumina dhuwur, agêng segara Pegunungan basalt (morb), basalt tholeiitic, basaltic trachyandesite, mugearite lan shoshonite
gandheng tuff, tuff rhyolitic, basaltic tuff, trachyte tuff, tuff andesitic lan ignimbrite.
tahan struktural dhuwur marang erosi lan iklim, rock grained banget nggoleki
tansah ditemokake minangka pipo vulkanik liwat lemah ndhuwur Continental jero