Fryer, Patricia2021-09-132021-09-131981http://hdl.handle.net/10125/76137The Mariana Trough, a young, actively spreading back-arc bas in, 1s very similar tectonically to normal mid-ocean ridges. The major difference 1s proximity of the spreading center 1n the Mariana Trough to an active subduction zone. Basaltic glasses retrieBasaltPetrology--Mariana Islands.Island arcs--Mariana Islands.Basalt--Mariana Islands.Thesis