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cataracts

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Journal Article
Journal: Geosphere
Published: 01 February 2016
Geosphere (2016) 12 (1): 135-175.
..., and their progressive south to north derangement by Walker Lane structures: the Stanislaus in the south, the Cataract in the middle, and the Mokelumne in the north.Previous work has shown that east-west Nevadaplano paleochannels in the central Sierra have four stratigraphic sequences floored by erosional unconformities...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 1914
GSA Bulletin (1914) 25 (1): 277-320.
...CHARLES SCHUCHERT AbstractIntroductionThis contribution to stratigraphy redefines the Medina formation and describes the character of its strata and fauna in the typical area in the State of New York. The new Cataract formation of Ontario is also described in detail and its fauna listed. Some...
Journal Article
Journal: Geology
Published: 01 September 2010
Geology (2010) 38 (9): 791-794.
... by the upstream migration of a large, ∼300-m-tall cataract during multiple flood events that span ∼1 b.y. of Mars history (3.7–2.6 Ga). Issuing from Hydapsis Chaos, these floods were initiated at a similar time and occurred over a similar time range to flooding in Ares Vallis, suggesting a potential regional...
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Image
(a) Photograph of folding within the Cambrian units at <b>Cataract</b> Falls. (b)
...
Published: 03 June 2016
Figure 7. (a) Photograph of folding within the Cambrian units at Cataract Falls. (b) Stereonet showing the orientations of fold hinge lines and a strike-slip fault within the outcrop.
Image
Measured sections through <b>Cataract</b> paleochannel fill. (A) The Dardanelles. ...
in > Geosphere
Published: 01 February 2016
Figure 6. Measured sections through Cataract paleochannel fill. (A) The Dardanelles. (B) Dardanelles Cone (1—base, 2—top). Lines of section are plotted in Figure 5D . Measured by Koerner (2010) . Plag—plagioclase; cpx—clinopyroxene; pyx—pyroxene; ol—olivine; hbl, hb—hornblende; kpar—potassium
Image
Measured sections through <b>Cataract</b> paleochannel fill. (A) The Dardanelles. ...
in > Geosphere
Published: 01 February 2016
Figure 6. Measured sections through Cataract paleochannel fill. (A) The Dardanelles. (B) Dardanelles Cone (1—base, 2—top). Lines of section are plotted in Figure 5D . Measured by Koerner (2010) . Plag—plagioclase; cpx—clinopyroxene; pyx—pyroxene; ol—olivine; hbl, hb—hornblende; kpar—potassium
Image
Measured sections through <b>Cataract</b> paleochannel fill. (A) The Dardanelles. ...
in > Geosphere
Published: 01 February 2016
Figure 6. Measured sections through Cataract paleochannel fill. (A) The Dardanelles. (B) Dardanelles Cone (1—base, 2—top). Lines of section are plotted in Figure 5D . Measured by Koerner (2010) . Plag—plagioclase; cpx—clinopyroxene; pyx—pyroxene; ol—olivine; hbl, hb—hornblende; kpar—potassium
Image
Oblique aerial photos of the <b>Cataract</b> paleochannel ( Fig. 3 ) in the centra...
in > Geosphere
Published: 01 February 2016
Figure 7. Oblique aerial photos of the Cataract paleochannel ( Fig. 3 ) in the central Sierra Nevada. (A) View toward the west down the Cataract paleochannel, toward Dardanelles Cone (DC); ED—East Dardanelles and The Dardanelles, mapped in Figure 5D . Dark-colored Miocene volcanic-volcaniclastic
Image
(A) View of the syndepositionally faulted <b>Cataract</b> paleochannel fill on the...
in > Geosphere
Published: 01 February 2016
Figure 9. (A) View of the syndepositionally faulted Cataract paleochannel fill on the east-west ridge between Bald Peak and Red Peak, immediately west of the Sierra Crest graben ( Fig. 2B ), showing superior exposure of stratigraphy and faults. (B) Oblique map view of Bald Peak–Red Peak ridge
Image
A: Kerma sites between the Second and Fourth <b>Cataracts</b> of the Nile. Inset: ...
in > Geology
Published: 01 June 2013
Figure 1. A: Kerma sites between the Second and Fourth Cataracts of the Nile. Inset: Nile basin. B: Exposures in the Northern Dongola Reach (NDR) where the Holocene stratigraphy has been recorded. Sites shown in black and red were dated by optically stimulated luminescence (OSL) or 14 C. C: Well
Image
Schematic diagram illustrating sequence of base-level change, <b>cataract</b> migr...
in > Geology
Published: 01 September 2010
Figure 4. Schematic diagram illustrating sequence of base-level change, cataract migration, and canyon evolution. A: Late Noachian–Early Hesperian overland floods are sourced from Hydapsis Chaos (white arrows) and are confluent with shallow precursor channels of Ares Vallis (black arrows). B
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Index map showing faults of the <b>Cataract</b> Creek fault system ( Shoemaker  et...
Published: 01 June 2008
Figure 2. Index map showing faults of the Cataract Creek fault system ( Shoemaker et al. , 1978 ). Solid circles are epicenters, proportional to size for the time period 1906–2005. Numbers in parentheses next to dates represent Richter magnitudes ( NEIC ). Box shows part of Blue Ridge area
Series: Geological Society, London, Special Publications
Published: 01 January 2011
DOI: 10.1144/SP356.11
EISBN: 9781862396043
... of observed cataract systems. The contact profiles suggest that the small basins linked by Lethe progressively ponded and over-spilled as the system developed, the cataracts being associated with this over-spill. Other landforms observed in the system include streamlined islands, anastomosing distributary...
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Series: GSA Special Papers
Published: 10 May 2018
DOI: 10.1130/2017.2531(04)
EISBN: 9780813795317
... deposits of the Lime Island Formation, the restricted lagoonal–tidal flat Byron Formation, and the open-marine deposits of the Hendricks Formation. The contacts with the underlying Cataract Group and overlying Manistique Group are gradational. Identification and description of facies in both cores...
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Journal Article
Journal: Geology
Published: 01 July 2017
Geology (2017) 45 (7): 583-586.
..., coulees, and cataracts, forming the Channeled Scabland of eastern Washington State (United States). However, the timing and exact pathways of these Missoula floods remain poorly constrained, thereby limiting our understanding of the evolution of this spectacular landscape. Here we report cosmogenic 10Be...
FIGURES
Journal Article
Published: 15 November 2016
Bulletin of the Seismological Society of America (2016) 106 (6): 2695-2705.
... is subject to infrequent moderate magnitude earthquakes, such as the 1993 Cataract Creek (Mw 5.3) and the 1912 surface‐wave magnitude (Ms) 6.2 events. The epicenter of the Mw 4.7 earthquake lies 2 km to the east of the Oak Creek normal fault. This is the most proximal event to the fault in the last 40 years...
Series: GSA Field Guide
Published: 01 January 2016
DOI: 10.1130/2016.0041(01)
EISBN: 9780813756417
..., U.S.A. The cataclysmic flooding produced huge coulees (dry river courses), cataracts, streamlined loess hills, rock basins, butte-and-basin scabland, potholes, inner channels, broad gravel deposits, and immense gravel bars. Giant current ripples (fluvial dunes) developed in the coarse gravel bedload...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2008
GSA Bulletin (2008) 120 (7-8): 1010-1020.
... precipitation, abundant poorly sorted material not stabilized by vegetation, and the exposure of certain fine-grained bedrock units in cliffs or in colluvium beneath those cliffs. In Grand and Cataract Canyons, fine-grained bedrock that produces debris flows contains primarily single-layer clays—notably illite...
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Journal Article
Published: 01 June 2008
Bulletin of the Seismological Society of America (2008) 98 (3): 1527-1534.
...Figure 2. Index map showing faults of the Cataract Creek fault system ( Shoemaker et al. , 1978 ). Solid circles are epicenters, proportional to size for the time period 1906–2005. Numbers in parentheses next to dates represent Richter magnitudes ( NEIC ). Box shows part of Blue Ridge area...
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Journal Article
Published: 01 February 2008
Italian Journal of Geosciences (2008) 127 (1): 75-92.
..., and an impressive cataract-like feature. Ice-related morphologies consist of ice-contact features, thermokarstic depressions, and patterned grounds. Geomorphological evidence suggests that catastrophic floods was, at place, more than 500 meters deep; furthermore, they was ice covered, confirming that the climatic...