basalt alkalin, boninite, basalt alumina dhuwur, agêng segara Pegunungan basalt (morb), basalt tholeiitic, basaltic trachyandesite, mugearite lan shoshonite
rocks pumice, rocks obsidian, rocks perlite, rocks porphyritic.
tahan struktural dhuwur marang erosi lan iklim, rock grained banget nggoleki
ngandhut asam ing alam, kasedhiya ing persil saka werna