| Dacitic domes and lava flows in Pyrgousa – Pahia (34) (Pictures) |
| Domes and thick flows of dacitic, hypocrystalline, highly porphyritic lava. In between lava beds, there are inlays of local monilithologic block and ash flows of the same composition, deposited after collapse of the nearby structures. Phenocrystals are the following, in order of abundance: plagioclase, clinopyroxene, hornblende, biotite, orthopyroxene and magnetite.
The main mass comprises of sparse glass and minor microliths of plagioclase, pyroxene and magnetite. Several secondary minerals are observed such as zeolites and hydroxides. |