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Pululagua Volcano, Ecuador
Cerro Sincholagua (left) and Loma la Marca (right) are the southernmost of a group of lava domes pre-dating the formation of Pululagua's caldera.
Seen here from the equator to their south, they are part of a chain of lava domes that were constructed on a roughly N-S line east of the caldera.
Cerro Sincholagua forms the highest peak of 3356-m Pululagua volcano.
PHOTO SOURCE: Lee Siebert 1978, courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
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