Geological and geophysical data for a three-dimensional view : inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado
1 online resource (4 unnumbered pages) : color illustrations, color maps
data file
OCLC
on1105810297
"June 2019."
"Prepared in collaboration with U.S. Forest Service, Bureau of Land Management, U.S. Environmental Protection Agency, Colorado Division of Reclamation Mining and Safety, Colorado Department of Public Health and Environment, and Animas River Stakeholders Group."