@mastersthesis {,
	title = {Geology of the Orcopampa 30 minute quadrange, southern Peru, with special focus on the evolution of the Chinch{\'o}n and Huayta calderas},
	volume = {Ph.D.},
	year = {1998},
	pages = {316 p.},
	school = {University of Nevada, Reno},
	type = {Unpublished Ph.D. Dissertation},
	address = {Reno, NV},
	keywords = {colca cotahuasi arequipa},
	author = {Swanson, Kirk E.}
}