An antidune is a bedform found in fluvial and other channeled environments. Antidunes occur in supercritical flow, meaning that the Froude number is greater...
7 KB (909 words) - 11:51, 27 November 2022
Turbidity current (section Antidune deposits)
increasing the overall understanding of these currents. Some of the largest antidunes on Earth are formed by turbidity currents. One observed sediment-wave...
37 KB (4,847 words) - 19:41, 27 September 2024
Sedimentary structures (section Antidunes)
the dunes become flattened out, and then produce antidunes. At higher still velocity, the antidunes are flattened and most sedimentation stops, as erosion...
13 KB (1,493 words) - 02:38, 4 December 2023
the cross-beds of a dune and the cross-beds of an antidune. (Dunes dip downstream while antidunes dip upstream.) The direction of motion of the cross-beds...
15 KB (1,983 words) - 09:50, 9 October 2022
pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level Degradation...
16 KB (1,865 words) - 01:33, 13 July 2024
pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level Degradation...
4 KB (433 words) - 09:13, 30 April 2024
pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level Degradation...
32 KB (3,829 words) - 03:39, 5 September 2024
pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level Degradation...
10 KB (1,336 words) - 10:00, 23 June 2024
pool Thalweg Bedrock river Canyon Knickpoint Plunge pool Bedforms Ait Antidune Dune Current ripple Regional processes Aggradation Base level Degradation...
24 KB (2,692 words) - 16:27, 30 August 2024
theme of dunes on fictional planets such as Tatooine, Geonosis, and Jakku. Antidune Devil's stovepipe Ice dune List of landforms Masseira Médanos Sandhill...
71 KB (7,745 words) - 01:18, 6 September 2024
current ripples are large-to-very-large, subaqueous gravel dunes and antidunes. Although they once covered a significantly larger area, they cover about...
18 KB (1,822 words) - 15:49, 9 July 2024
motion can create self-organized structures such as ripples, dunes, or antidunes on the river or stream bed. These bedforms are often preserved in sedimentary...
11 KB (1,276 words) - 04:32, 26 May 2024
it burst. Giant current ripples, (gravel wave trains, gravel dunes and antidunes) up to 18 meters high and 225 meters in wavelength were created in several...
8 KB (949 words) - 08:21, 26 August 2024
sedimentary structures typical of high-velocity flow, such as dunes and antidunes. Volcanic ash already deposited on the surface can be transported as mud...
42 KB (4,848 words) - 16:53, 17 September 2024
terrestrial air-fall, pyroclastic surge and flow deposits including dune and antidune structures, crystal layering, well-sorted granular laminations, diffuse...
7 KB (1,010 words) - 06:39, 9 December 2023
plane bed High Flat laminae, +/- aligned grains (parting lineations) Antidunes Low Water in phase with bedform, low angle, subtle laminae Pool and chute...
11 KB (1,243 words) - 22:06, 12 July 2023
which occurred around 4 billion years ago, taking into consideration antidunes reaching the height of 10 meters (33 ft), which were formed by flood waters...
61 KB (5,797 words) - 18:18, 25 August 2024
Several common ripple shapes. Giant current ripples usually exhibit antidune breaking wave and dune ripple shapes, resulting from their high energy environments...
12 KB (1,138 words) - 05:35, 1 August 2024
Schmincke, Hans-Ulrich; Fisher, Richard V.; Waters, Aaron C. (1973). "Antidune and chute and pool structures in the base surge deposits of the Laacher...
17 KB (1,832 words) - 01:56, 18 September 2024
sediment deposited closer in proximity to the glacial ice forms dunes and antidunes whereas the sediment deposited further away from the glacial ice is more...
13 KB (1,663 words) - 03:54, 28 March 2024
channel sandstone shows abundant trough cross-stratification and a possible antidune bedform composed of gravel and sand which indicates flow velocities as...
7 KB (827 words) - 08:57, 5 May 2024
Froude number is high enough. If the Froude number is lower than required, antidunes will form instead. Additionally, if the sediment is too fine then chute-and-pool...
19 KB (2,057 words) - 15:17, 22 August 2024