Preliminary geologic map of the Gould quadrangle, North Park, Jackson County, Colorado

Kinney, Douglas M.; Hail, W.J.; Steven, Thomas A.

doi:10.3133/ofr70182

Cited by 5 publications

(15 citation statements)

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“…Exposed beds on the southern limb of the syncline dip 12°-32° NE. ; dip values average 23° (Hail, 1965;Kinney, 1970a;Kinney and Hail, 1970a; this study). Exposed beds on the northern limb of the syncline dip 14°-33° SW.; dip values average 23° (Hail, 1965;Kinney, 1970a;Kinney and Hail, 1970a;this study).…”

Section: Structural Setting Of the North Park Synclinementioning

confidence: 62%

“…Later work by Montagne and Barnes (1957) along the flanks of the North Park syncline revealed that the lowest part of the North Park Formation, as established by Beekly (1915), locally contains vertebrate fossil-bearing beds typically assigned to the White River Formation. Geologic mapping in and near the syncline by Hail (1965), Kinney (1970a), Kinney and Hail (1970a), and Tweto (1976) assigned light-colored, tuffaceous claystone, siltstone, and minor finegrained sandstone beds, which locally contain titanothere bones of Chadronian age (table 2) (Montagne and Barnes, 1957), to the White River Formation and the overlying coarser grained sandstone and conglomerate to the North Park Formation. The North Park Formation typically contains sparse to abundant volcanic clasts (Hail, 1965); locally contains a thin, poorly table 1 and those cited elsewhere in this report.…”

Section: Area Of Figurementioning

confidence: 99%

“…10 Professor Emeritus, University of Colorado at Boulder. [Ages of time boundaries are those of Tedford and others (2004) except for the Chadronian, which is that of Prothero and Emry (2004 (Kinney, 1970a); and is interlayered with rhyodacite lava flows and volcanic breccia at Owl Mountain (Montagne and Barnes, 1957;Barnes, 1958;Cole and others, 2010). The North Park Formation disconformably overlies deposits of the White River Formation and, locally, those of the Coalmont Formation (Steven, 1960;Hail, 1965;Kinney, 1970a;Tweto, 1976).…”

mentioning

confidence: 91%

“…North Park occupies the northern part of the North Park-Middle Park basin of Laramide age (Tweto, 1980), also informally known as the Colorado Headwaters basin (Cole and others, 2010), that formed during middle Paleocene through early Eocene time (Cole and Dechesne, 2013;Dechesne and others, 2013a). The main body of the North Park Formation is preserved in the North Park syncline (40 kilometers [km] long, 1-8 km wide, trending roughly N. 65° W.) in the southern part of North Park where it was mapped by Hail (1965Hail ( , 1968, Kinney (1970a), Hail (1970a), andTweto (1976). Except for small, widely spaced exposures commonly observed along the southern margin of the North Park syncline, much of the North Park Formation is concealed beneath relatively thin surficial deposits, which consist of sheetwash alluvium, colluvium, and minor lag gravel that support a vegetative cover composed mainly of sagebrush, grasses, and herbs.…”

Section: Introductionmentioning

confidence: 99%

“…[Ages of time boundaries are those of Tedford and others (2004) except for the Chadronian, which is that of Prothero and Emry (2004 (Kinney, 1970a); and is interlayered with rhyodacite lava flows and volcanic breccia at Owl Mountain (Montagne and Barnes, 1957;Barnes, 1958;Cole and others, 2010). The North Park Formation disconformably overlies deposits of the White River Formation and, locally, those of the Coalmont Formation (Steven, 1960;Hail, 1965;Kinney, 1970a;Tweto, 1976). The deposition of the White River Formation followed a major episode of erosion and stream incision (Evanoff, 1990) at about 42-37 Ma (Lillegraven, 1993;Cather and others, 2012).…”

mentioning

confidence: 99%

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Geologic framework, age, and lithologic characteristics of the North Park Formation in North Park, north-central Colorado

Shroba¹

2016

Scientific Investigations Report

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COVER. View to the southeast looking toward the high peaks near the north end of the Never Summer Mountains. Highest peak on the skyline (right) is Mount Richthofen (12,940 feet [3,944 meters]), which is composed of 29.7-mega-annum (Ma, million years ago) granodiorite and monzonite of the Mount Richthofen stock. The serrate portion of the skyline to the left of Mount Richthofen, known as the Nokhu Crags, is composed of thermally metamorphosed Pierre Shale. Northeast-dipping rocks and sediments of the North Park Formation are locally exposed at Owl Ridge in the foreground. The base of the ledge-forming rocks in right foreground mark the base of the North Park Formation. The communications tower in left foreground is on the eroded top of the formation. A thin, 28.1-Ma ash-flow tuff, erupted from the Braddock Peak volcanic and intrusive complex in the north part of the Never Summer Mountains, is locally exposed slightly above the ledge-forming rocks in the right foreground. Photograph by R.R. Shroba, U.S. Geological Survey, August 6, 2011. For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. AbstractDeposits of the North Park Formation of late Oligocene and Miocene age are locally exposed at small, widely spaced outcrops along the margins of the roughly northwest-trending North Park syncline in the southern part of North Park, a large intermontane topographic basin in Jackson County in north-central Colorado. These outcrops suggest that rocks and sediments of the North Park Formation consist chiefly of poorly consolidated sand, weakly cemented sandstone, and pebbly sandstone; subordinate amounts of pebble conglomerate; minor amounts of cobbly pebble gravel, siltstone, and sandy limestone; and rare beds of cobble conglomerate and altered tuff. These deposits partly filled North Park as well as a few small nearby valleys and half grabens. In North Park, deposits of the North Park Formation probably once formed a broad and relatively thick sedimentary apron composed chiefly of alluvial slope deposits (mostly sheetwash and streamchannel alluvium) that extended, over a distance of at least 150 kilometers (km), northwestward from the Never Summer Mountains and northward from the Rabbit Ears Range across North Park and extended farther northwestward into the valley of the North Platte River slightly north of the ColoradoWyoming border. The maximum preserved thickness of the formation in North Park is about 550 ...

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Section: Structural Setting Of the North Park Synclinementioning

confidence: 62%

Section: Area Of Figurementioning

confidence: 99%

mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Geologic framework, age, and lithologic characteristics of the North Park Formation in North Park, north-central Colorado

Shroba¹

2016

Scientific Investigations Report

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Preliminary geologic studies of cold climate dunes, North Park, Jackson County, Colorado

Ahlbrandt¹,

Andrews²

1977

Open-File Report

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Coal resource occurrence and coal development potential maps of the Johnny Moore Mountain Quadrangle, Jackson and Larimer counties, Colorado

Inc.¹

1979

Open-File Report

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Development potential using surface mining methods-16 Development potential using surface mining methods and in situ coal gasification-17 References 19 3. Proximate analyses of coal (as-received) from the Sudduth bed in the Canadian strip mine, SWH; sec. 2. T. 8 N., R. 78 W., Jackson County, Colorado 4. Coal mines in the Johnny Moore Mountain quadrangle, Jackson and Larimer Counties, Colorado 5. Sources of data used on plate 1.

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Preliminary geologic map of the Gould quadrangle, North Park, Jackson County, Colorado

Cited by 5 publications

References 0 publications

Geologic framework, age, and lithologic characteristics of the North Park Formation in North Park, north-central Colorado

Geologic framework, age, and lithologic characteristics of the North Park Formation in North Park, north-central Colorado

Preliminary geologic studies of cold climate dunes, North Park, Jackson County, Colorado

Coal resource occurrence and coal development potential maps of the Johnny Moore Mountain Quadrangle, Jackson and Larimer counties, Colorado

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