Monoclines of the Colorado Plateau

Kelley, Vincent C.

doi:10.1130/0016-7606(1955)66[789:motcp]2.0.co;2

Cited by 90 publications

(27 citation statements)

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“…However, several investigators have noted evidence for significant shortening of layers within monoclines (Walcott, 1890;Baker, 1935;Kelley, 1955;Reches, this volume). Kelley (1955) examined most of the monoclines on the Colorado Plateau and reported widespread evidence of layer-parallel shortening. Detailed study of the East Kaibab monocline in Palisades Creek (Reches, this volume), indicates abundant evidence for layer-parallel shortening within and near the monocline.…”

Section: Introductionmentioning

confidence: 95%

“…A necessary conclusion from this concept of drape folding is that the layers should be extended in the anticlinal part of the monocline if the dip and displacement of the fault below are vertical (Sanford, 1959). However, several investigators have noted evidence for significant shortening of layers within monoclines (Walcott, 1890;Baker, 1935;Kelley, 1955;Reches, this volume). Kelley (1955) examined most of the monoclines on the Colorado Plateau and reported widespread evidence of layer-parallel shortening.…”

Section: Introductionmentioning

confidence: 99%

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Development of monoclines: Part II. Theoretical analysis of monoclines

Reches¹,

Johnson²

1978

Geological Society of America Memoirs

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Monoclinal flexures, which are isolated asymmetric flexures, range in scale from a few millimetres in kink bands to hundreds of metres in monoclines on the Colorado Plateau. A general model of monoclinal flexuring of multilayers is proposed here; the multilayers include layers with various rheologies, densities, thicknesses, and strengths of contacts between layers. The multilayers are subjected to displacements at their base, stresses at their edges, and a free surface at their tops. We study in detail three modes of this general model, assuming linear, incompressible elastic or viscous multilayers: Drape folding, in which a monoclinal flexure develops over a vertical fault; buckling, in which an initial monoclinal flexure is amplified by layer-parallel compression; and kinking, in which monoclinal kink bands develop unstably by compression inclined to the layering. Selected solutions are presented for the first two modes, and previous research is summarized for the kinking mode.According to analyses of the three special cases of the general model, the profile of the monoclinal flexure, the displacement field, and the strain distribution within the flexure are useful criteria for distinguishing among the three modes of monoclinal flexuring. The Palisades monocline, described in detail in Part I (this volume), is interpreted to be a result of a combination of drape folding over a fault in Precambrian basement rocks and buckling, which together appear to account for most of the field observations. The Yampa monocline in Dinosaur National Park changes form along its length, but each form can be compared with characteristics of a combination of modes, including faulting at depth and layer-parallel compression. In some places it closely resembles a large kink band. 273 on June 5, 2015 memoirs.gsapubs.org Downloaded from

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Development of monoclines: Part II. Theoretical analysis of monoclines

Reches¹,

Johnson²

1978

Geological Society of America Memoirs

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“…However, in order to maintain consistent and balanced structural offset, these structures are interpreted as parts of a single system. Furthermore, these structures remarkably resemble monoclinal drape folds found on the Colorado Plateau that formed in sedimentary strata overlying reactivated basement faults (Kelley, 1955;Davis, 1978). Davis (1978) experimentally produced drape folds identical to the Cap au Gres-Waterloo-Dupo structure, including its sharp bends, by subjecting buried, near-vertical structures to compression.…”

Section: Valmeyer Anticline O'fallon Faultmentioning

confidence: 69%

Bedrock geologic map of the St. Louis 30' x 60' Quadrangle, Missouri and Illinois

Harrison¹

1997

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“…South and east of the Monument Uplift is the Tyende Saddle (O' Sullivan and Beikman, 1963), separated from the uplift by the Comb Ridge Monocline, a major monocline of the Colorado Plateau (Kelley, 1955), with a length of about 153 km (95 mi). Stratigraphic units are displaced a maximum of 914 m (3000 ft) at a maximum dip angle of 45° across the Comb Ridge Monocline (Kelley, 1955). …”

Section: Regional Structurementioning

confidence: 99%

Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Appendix D. Final report

1988

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Monoclines of the Colorado Plateau

Cited by 90 publications

References 0 publications

Development of monoclines: Part II. Theoretical analysis of monoclines

Development of monoclines: Part II. Theoretical analysis of monoclines

Bedrock geologic map of the St. Louis 30' x 60' Quadrangle, Missouri and Illinois

Remedial Action Plan and site design for stabilization of the inactive uranium mill tailings site at Mexican Hat, Utah: Appendix D. Final report

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