Data release for Geologic Map of the Leadville North 7.5' quadrangle, Eagle and Lake Counties, Colorado
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 anticlinorium
along the western and eastern flanks of Missouri Hill. Within
the western half of the quadrangle, Meso- and Paleoproterozoic
metamorphic and igneous rocks are uplifted along the generally
east-dipping, high-angle Sawatch fault system and are overlain
by at least three generations of glacial deposits in the
western part of the quadrangle. 10Be and 26Al cosmogenic nuclide
ages of the youngest glacial deposits indicate a last glacial
maximum age of about 21–22 kilo-annum and complete deglaciation
by about 14 kilo-annum, supported by chronologic studies in
adjacent drainages. No late Pleistocene tectonic activity is
apparent within the quadrangle.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "Cal Ruleman",
"@type": "vcard:Contact",
"hasEmail": "mailto:cruleman@usgs.gov"
}
|
| description | 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 anticlinorium along the western and eastern flanks of Missouri Hill. Within the western half of the quadrangle, Meso- and Paleoproterozoic metamorphic and igneous rocks are uplifted along the generally east-dipping, high-angle Sawatch fault system and are overlain by at least three generations of glacial deposits in the western part of the quadrangle. 10Be and 26Al cosmogenic nuclide ages of the youngest glacial deposits indicate a last glacial maximum age of about 21–22 kilo-annum and complete deglaciation by about 14 kilo-annum, supported by chronologic studies in adjacent drainages. No late Pleistocene tectonic activity is apparent within the quadrangle. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "http://dx.doi.org/10.5066/F7DR2TRG",
"mediaType": "application/http",
"description": "Landing page for access to the data"
},
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5a81dc10e4b00f54eb30eb33.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_5a81dc10e4b00f54eb30eb33 |
| keyword |
[
"10Be, 26Al",
"Belden Formation",
"Buckeye Peak",
"Bull Lake age",
"Bull Lake glaciation",
"Cambrian",
"Camp Hale",
"Chaffee Group",
"Chicago Ridge",
"Colorado",
"Colorado River",
"Cooper Hill",
"Cretaceous",
"Devonian",
"Dotsero Formation",
"Eagle County",
"Eagle River",
"East Fork Arkansas River",
"Eocene",
"Gray porphyry group",
"Holocene",
"Hornblende Latite Porphyry",
"Lake County",
"Laramide",
"Leadville",
"Leadville Limestone",
"Leadville Quadrangle",
"Lincoln Porphyry",
"Manitou Dolomite",
"Mesoproterozoic",
"Minturn Formation",
"Miocene",
"Mississippian",
"Missouri Hill",
"Mosquito Range",
"Mount Zion",
"No Name Gulch",
"Oligocene",
"Ordovician",
"Paleocene",
"Paleoproterozoic",
"Pennsylvanian",
"Pinedale Glaciation",
"Pinedale age",
"Pleistocene",
"Pliocene",
"Proterozoic",
"Quaternary",
"Rio Grande rift",
"Sawatch Quartzite",
"Sawatch Range",
"Sawatch anticlinorium",
"South Park",
"St. Kevin Granite",
"Tennessee Creek",
"Tennessee Park",
"Tennessee Pass",
"Tertiary",
"Turquoise Lake",
"USA",
"USGS:5a81dc10e4b00f54eb30eb33",
"United States",
"Upper Arkansas River",
"Upper Arkansas Valley",
"White Porphyry Group",
"cosmogenic nuclide",
"neotectonics",
"pre-Bull Lake age",
"pre-Bull Lake glaciation"
]
|
| modified | 2022-08-29T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -106.37500, 39.250000, -106.25000, 39.375000 |
| theme |
[
"Geospatial"
]
|
| title | Data release for Geologic Map of the Leadville North 7.5' quadrangle, Eagle and Lake Counties, Colorado |
