A bedform is a geological feature that develops at the interface of fluid and a moveable bed, the result of bed material being moved by fluid flow. Examples...
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cross-strata. Cross-bedding forms during deposition on the inclined surfaces of bedforms such as ripples and dunes; it indicates that the depositional environment...
15 KB (1,983 words) - 09:50, 9 October 2022
Hall, Minard; Ramón, Patricio; Dingwell, Donald B. (2013-10-13). "Dune bedforms produced by dilute pyroclastic density currents from the August 2006 eruption...
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An antidune is a bedform found in fluvial and other channeled environments. Antidunes occur in supercritical flow, meaning that the Froude number is greater...
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Sedimentary structures (section Bedforms vs. flow)
varying speeds and velocities produce different structures, are called bedforms. In the lower flow regime, the natural progression is from a flat bed,...
13 KB (1,493 words) - 02:38, 4 December 2023
characteristic of turbidity currents. The surface of a particular bed, called the bedform, can also be indicative of a particular sedimentary environment. Examples...
63 KB (7,683 words) - 08:39, 25 June 2024
represented by sand-flow maps. These are based on meteorological observations, bedform orientations, and trends of yardangs. They are analogous to drainage maps...
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In geology, ripple marks are sedimentary structures (i.e., bedforms of the lower flow regime) and indicate agitation by water (current or waves) or directly...
11 KB (1,030 words) - 23:30, 18 March 2024
regolith components identified at landing sites. Typical examples include: bedform (a feature that develops at the interface of fluid and a moveable bed such...
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next blows in the dominant direction. Draas are very large-scale dune bedforms; they may be tens or a few hundreds of metres in height, kilometres wide...
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Cyclic steps (section Relation to other bedforms)
Cyclic steps are rhythmic bedforms associated with Froude super-critical flow instability. They are a type of sediment wave, and are created when supercritical...
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Fluvial sediment processes (section Fluvial bedforms)
such as ripples, dunes, or antidunes on the river or stream bed. These bedforms are often preserved in sedimentary rocks and can be used to estimate the...
11 KB (1,276 words) - 04:32, 26 May 2024
Lithification Siltation Turbidity currents By structure Sedimentary structures Bedforms cross-bedding duness graded bedding ripple marks Alluvial fan Alluvial...
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with tidal currents. Wave action is much more important for determining bedforms of sediments deposited along mesotidal and microtidal coasts than in macrotidal...
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slope Stream pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level...
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models to make topographical depictions of unknown glacial features and bedforms. Newfound glacial features include an ice-sculptured bedrock surface, residual...
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slope Stream pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level...
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R. et al., in press, 'The Role of Bio-physical Cohesion on Subaqueous Bedform Size', Geophysical Research Letters, February, 2016. Malarkey, J., Baas...
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Lithification Siltation Turbidity currents By structure Sedimentary structures Bedforms cross-bedding duness graded bedding ripple marks Alluvial fan Alluvial...
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Kochanski, K.; Anderson, R.S.; Tucker, G. (2019). "The evolution of snow bedforms in the Colorado Front Range". The Cryosphere. 13: 1267–1281. doi:10.5194/tc-13-1267-2019...
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Lithification Siltation Turbidity currents By structure Sedimentary structures Bedforms cross-bedding duness graded bedding ripple marks Alluvial fan Alluvial...
22 KB (2,812 words) - 01:47, 17 March 2024
23 April 2011. Blodgett, R.H.; Stanley, K.O. (1980). "Stratification, Bedforms, and Discharge Relations of the Platte Braided River System, Nebraska"...
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and viscosity, and can therefore not exert very much shear on its bed. Bedforms are generated by aeolian sediment transport in the terrestrial near-surface...
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grain size, with the smallest grains at the top Ripples: the smallest bedform type Dunes: larger and similar in shape to ripples Carbonaceous sedimentary...
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the surface of a niveo-aeolian deposit typically consists of a rippled bedform of mixed sand and snow. Beneath the surface, the deposits commonly consist...
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descend from the polar high to transport ice and create large wavelength bedforms. The spiral shape comes from Coriolis effect forcing of the winds, much...
114 KB (11,735 words) - 04:14, 29 July 2024
Broadcasting Corporation. Retrieved 9 May 2015. Harris, P. T. (1988). "Sediments, bedforms and bedload transport pathways on the continental shelf adjacent to Torres...
24 KB (2,850 words) - 23:55, 10 July 2024
slope Stream pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level...
10 KB (1,336 words) - 10:00, 23 June 2024
ISBN 978-0-902246-04-1. Shaw, John (April 2002). "The meltwater hypothesis for subglacial bedforms". Quaternary International. 90 (1): 5–22. Bibcode:2002QuInt..90....5S....
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the form of discontinuous layers. Discontinuous layers likely represent bedforms that were generated by storm waves and currents. Any layers that are thicker...
16 KB (2,062 words) - 00:10, 14 January 2024