Geologic map of the Estes Park 30ʹ x 60ʹ quadrangle, north-central Colorado / James C. Cole and William A. Braddock ; U.S. Department of the Interior, U.S. Geological Survey.

Format:

Government document

Map/Atlas

Author/Creator:

Cole, James C.

Contributor:

Braddock, William A., 1929-2003

Geological Survey (U.S.)

Series:

Scientific investigations map ; 3039.

Scientific investigations map ; 3039

Language:

English

Subjects (All):

Geology--Colorado--Rocky Mountain National Park Region--Maps.

Geology.

Colorado--Rocky Mountain National Park Region.

Genre:

Maps

Maps.

Physical Description:

1 online resource (1 map)

Scale 1:100,000 ; Universal transverse Mercator projection (W 106°00ʹ--W 105°00ʹ/N 40°30ʹ--N 40°00ʹ).

Cartographic Data:

Scale 1:100,000 ; Universal transverse Mercator projection (W 106°00ʹ--W 105°00ʹ/N 40°30ʹ--N 40°00ʹ).

Place of Publication:

[Reston, Va.] : U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, Information Services, 2009.

Summary:

The rocks and landforms of the Estes Park 30 x 60 minute quadrangle display an exceptionally complete record of geologic history in the northern Front Range of Colorado. The Proterozoic basement rocks exposed in the core of the range preserve evidence of Paleoproterozoic marine sedimentation, volcanism, and regional soft-sediment deformation, followed by regional folding and gradational metamorphism. The metasedimentary rocks of the Estes Park quadrangle are distinct within northern Colorado for preserving the complete metamorphic zonation from low-grade chlorite-muscovite phyllites, through middle greenschist-grade rocks with sequential aluminous porphyroblasts, to partially melted gneisses that contain high-grade cordierite and garnet in the non-melted residues. Regional and textural evidence shows that the widespread metamorphism was essentially concurrent with intrusion of the Boulder Creek Granodiorite and related magmas and with the peak of deformation in the partially melted high-grade rocks. The metamorphic thermal pulse arrived later following the peak of deformation in the physically higher, cooler, low-grade terrane.

Notes:

Relief shown by contours and spot heights.

Includes location maps, 2 index maps, 1 lithologic column, and 7 col. ill.

Includes bibliographical references (pages 49-56).

Title from title screen (viewed May 15, 2009).

Other Format:

Print version: Cole, James C. Geologic map of the Estes Park 30ʹ x 60ʹ quadrangle, north-central Colorado

ISBN:

9781411322219

1411322215

OCLC:

321043611