- Andesite (/ˈændəzaɪt/) is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende.
And when he had gone a little farther thence, he saw James the son of Zebedee, and John his brother, who also were in the ship mending their nets.
Mark 1:19 KJV