Geology and eruptive mechanisms of Masaya Caldera complex,Nicaragua (Geología y mecanismos eruptivos del complejo Masaya) Caldera, Nicaragua - Stanley Nichols, Williams (A Tesis submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy by Stanley Nichols Williams Dartmouth Collge Hanover,New Hampshire 03755 USA, 2021)