The newest information pamphlet published by the Wyoming State Geological Survey (WSGS) explores South Pass, an area known for its rich history of mining that dates back centuries and continues today. The pamphlet is the twelfth in a series that shares geology of Wyoming state parks; the South Pass publication is the first to focus on state historic site.
“This publication series continues to be popular, and after we finished with state parks, it made sense for us to expand the focus to geologically oriented historic sites in Wyoming,” says Dr. Erin Campbell, WSGS Director and State Geologist. “The geology at South Pass is impressive, and our new pamphlet offers a glimpse at some of the uniqueness of the area.”
South Pass is on the southeastern edge of the Wind River Range and south of Lander. It has a wide range of known and potential mineral resources, such as gold, copper, and iron. The Carissa mine in South Pass City opened in 1867 and was the largest gold-mining operation in the region. Today, visitors to the historic site can tour the Carissa.
“The South Pass area is fascinating for both its 3 billion years of geologic history and its potential for hosting gold and other metals in various types of mineral deposits,” says WSGS geologist Dr. Chris Doorn. “The South Pass City State Historic Site provides the unique opportunity to learn about ancient geologic processes and to delve into Wyoming’s rich mining history.”
The pamphlet includes a geologic map and provides an overview of South Pass’s geologic history, noting how the area looked much different billions of years ago compared to what is seen today. The publication also notes rocks and mineral resources.
Other pamphlets in the series highlight the geology of Bear River, Boysen, Buffalo Bill, Curt Gowdy, Edness K. Wilkins, Glendo, Guernsey, Hot Springs, Keyhole, Seminoe, and Sinks Canyon state parks.
Pamphlets are available at their respective state parks and historic sites, as well as at the WSGS office in Laramie and as free downloads.