What are Island Arcs ?The andesite originates most likely from the melting of parts of the descending plate and sediments that h
ad accumulated on its surface. What list identifies minerals present in andesite from the greatest percentage by volume to the least percentage by volume?
The island arcs are a long chain of active volcanoes and have intense seismic activity and are found along with the rings of fire as the convergent plate boundary and form a chain of active or the extinct volcanoes that form an arc-shaped pattern on he deep-sea trench.
Andesite is an extrusive igneous rock of the intermediate composition and is an intermediate between the basalt's and the rhyolite and has 50 to 67% of the Silicon oxide and is dominated by the pyroxene s and the hornblende and feldspar is present in lower amounts.
<u>This andesite is characterized by the presence of the subduction zone s and the mental wedge.</u>
