Skip to main content
USGS - science for a changing world

Data release for Geologic Map of the Leadville North 7.5' quadrangle, Eagle and Lake Counties, Colorado

Dates

Publication Date
Time Period
2018

Citation

Ruleman, C.A., Brandt, T.R., Goehring, B.M., and Caffee, M.A., 2018, Data release for Geologic Map of the Leadville North 7.5' quadrangle, Eagle and Lake Counties, Colorado: U.S. Geological Survey data release, https://doi.org/10.5066/F7DR2TRG.

Summary

The Leadville North 7.5' quadrangle lies at the northern end of the Upper Arkansas Valley, where the Continental Divide at Tennessee Pass creates a low drainage divide between the Colorado and Arkansas River watersheds. In the eastern half of the quadrangle, the Paleozoic sedimentary section dips generally 20–30 degrees east. At Tennessee Pass and Missouri Hill, the core of the Sawatch anticlinorium is mapped as displaying a tight hanging-wall syncline and foot-wall anticline within the basement-cored structure. High-angle, west-dipping, Neogene normal faults cut the eastern margin of the broad, Sawatch anticlinorium. Minor displacements along high-angle, east- and west-dipping Laramide reverse faults occurred in the core of the north-plunging [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

SIM3400.xml
Original FGDC Metadata

View
51.26 KB
SIM3400.txt 57.47 KB
SIM3400_Data_Release.zip 421 MB

Purpose

Land-use planners of many kinds (including National Forest managers, developers, city and rural planners, and highway builders) need accurate geologic data with which to make informed decisions. The Leadville North quadrangle is designed to meet this requirement. The map is also part of the National Geologic Database, which is intended as digital framework for the entire country. From a scientific standpoint, the map clarifies many structural and lithologic relationships at the northern end of the Upper Arkansas River Valley, showing relationships between Laramide contractional faults and Rio Grande rift extensional faults. Tectono-magmatic relationships are also shown with the four ages of intrusive rocks. Cosmogenic nuclide data provides absolute age constraints on late Pleistocene deposits for further geomorphic and seismotectonic studies.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F7DR2TRG

Item Actions

View Item as ...

Save Item as ...

View Item...