Data release for Geologic Map of the Homestake Reservoir 7.5' quadrangle, Lake, Pitkin, and Eagle Counties, Colorado
The Homestake Reservoir 7.5' quadrangle lies at the northwestern
end of the Upper Arkansas Valley, and headwaters of the Arkansas
River, and the Roaring Fork, Fryingpan, and Eagle Rivers of the
Colorado River system. The quadrangle lies within tectonic
provinces of the 1.4 Ga Picuris Orogeny, the late Paleozoic
Ancestral Rockies, Late Cretaceous-Paleocene Laramide orogeny,
Oligocene to Miocene, and Pliocene?, volcanism, and Miocene to
the present Rio Grande rift extensional tectonics. In the eastern
half of the quadrangle, high-angle, east-dipping, Neogene normal
faults displace Proterozoic rocks, and locally Mio-Pliocene?
volcanic rocks. Many quartz veins and hydrothermally altered
zones are exposed along the eastern flank of the quadrangle,
indicative of the multiple tectonic episodes the region has
experienced. Within the western half of the quadrangle, Meso-
and Paleoproterozoic igneous and metamorphic rocks of 1.4 Ga
St. Kevin Granite and 1.7-1.8 Ga Biotite gneiss and schist,
respectively, are uplifted along the generally east-dipping,
high-angle Sawatch fault system. In the northwest portion of the
quadrangle, strands of the Homestake shear zone have been mapped,
dated and assigned to the 1.4 Ga Picuris orogeny of northern New
Mexico. 10Be and 26Al cosmogenic nuclide ages of the youngest
glacial deposits indicate a last glacial maximum age of about
21â22 kilo-annum and complete deglaciation by about 14 kilo-annum,
supported by chronologic studies in adjacent drainages. The
Turquoise Lake impounding lateral and terminal moraine complex
was deposited during late Pleistocene glacial maximum ~22-21 ka.
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 Homestake Reservoir 7.5' quadrangle lies at the northwestern end of the Upper Arkansas Valley, and headwaters of the Arkansas River, and the Roaring Fork, Fryingpan, and Eagle Rivers of the Colorado River system. The quadrangle lies within tectonic provinces of the 1.4 Ga Picuris Orogeny, the late Paleozoic Ancestral Rockies, Late Cretaceous-Paleocene Laramide orogeny, Oligocene to Miocene, and Pliocene?, volcanism, and Miocene to the present Rio Grande rift extensional tectonics. In the eastern half of the quadrangle, high-angle, east-dipping, Neogene normal faults displace Proterozoic rocks, and locally Mio-Pliocene? volcanic rocks. Many quartz veins and hydrothermally altered zones are exposed along the eastern flank of the quadrangle, indicative of the multiple tectonic episodes the region has experienced. Within the western half of the quadrangle, Meso- and Paleoproterozoic igneous and metamorphic rocks of 1.4 Ga St. Kevin Granite and 1.7-1.8 Ga Biotite gneiss and schist, respectively, are uplifted along the generally east-dipping, high-angle Sawatch fault system. In the northwest portion of the quadrangle, strands of the Homestake shear zone have been mapped, dated and assigned to the 1.4 Ga Picuris orogeny of northern New Mexico. 10Be and 26Al cosmogenic nuclide ages of the youngest glacial deposits indicate a last glacial maximum age of about 21â22 kilo-annum and complete deglaciation by about 14 kilo-annum, supported by chronologic studies in adjacent drainages. The Turquoise Lake impounding lateral and terminal moraine complex was deposited during late Pleistocene glacial maximum ~22-21 ka. No late Pleistocene tectonic activity is apparent within the quadrangle. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P9ON6QBE",
"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.5e1c94a8e4b0ecf25c5efd0f.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_5e1c94a8e4b0ecf25c5efd0f |
| keyword |
[
"10Be, 26Al",
"10th Mountain Division Hut",
"Bald Eagle Mountain",
"Bear Lake",
"Brady Lake",
"Bull Lake age",
"Bull Lake glaciation",
"Busk Creek",
"Camp Hale",
"Carlton Tunnel",
"Colorado",
"Colorado River",
"Cretaceous",
"Eagle County",
"Eagle River",
"Eocene",
"Galena Lake",
"Galena Mountain",
"Hagerman Pass",
"Hagerman Tunnel",
"Holocene",
"Homestake Creek",
"Homestake Peak",
"Homestake Reservoir",
"Homestake shear zone",
"Isolation Lake",
"Lake County",
"Lake Esther",
"Laramide",
"Leadville",
"Leadville Mining District",
"Leadville Quadrangle",
"Lincoln Porphyry",
"Longs Gulch",
"Mesoproterozoic",
"Mill Creek",
"Miocene",
"Miocene volcanics",
"Mount Massive Wilderness",
"Mount of the Holy Cross Wilderness",
"Oligocene",
"Oligocene volcanics",
"Paleocene",
"Paleoproterozoic",
"Paradise Lakes",
"Pinedale Glaciation",
"Pinedale age",
"Pitkin County",
"Pleistocene",
"Pliocene",
"Pliocene volcanics",
"Porcupine Gulch",
"Proterozoic",
"Quaternary",
"Rio Grande rift",
"San Isabel National Forest",
"Sawatch Range",
"Sawatch anticlinorium",
"Slide Lake",
"Sopris Creek",
"South Park",
"St. Kevin Granite",
"St. Kevin Mining District",
"Tennessee Creek",
"Tennessee Park",
"Tennessee Pass",
"Tertiary",
"Timberline Lake",
"Turquoise Lake",
"USA",
"USGS:5e1c94a8e4b0ecf25c5efd0f",
"Uncle Budâs Cabin",
"United States",
"Upper Arkansas River",
"Upper Arkansas Valley",
"White River National Forest",
"cosmogenic nuclide",
"landslides",
"metalamprophyre",
"neotectonics",
"pre-Bull Lake age",
"pre-Bull Lake glaciation",
"pseudotachylite",
"sakungen"
]
|
| modified | 2022-08-29T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -106.50000, 39.250000, -106.37500, 39.375000 |
| theme |
[
"Geospatial"
]
|
| title | Data release for Geologic Map of the Homestake Reservoir 7.5' quadrangle, Lake, Pitkin, and Eagle Counties, Colorado |
