ripple mark


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Related to ripple mark: Cross bedding
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ripple markripple mark
  • noun

Words related to ripple mark

nounone of a series of small ridges produced in sand by water currents or by wind

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References in periodicals archive ?
Ripple marks. Ripple marks are typically generated by currents moving in one direction or by the to-and-fro motion of waves in shallow water to depths of a few tens of feet at the most.
Ripple marks and mud cracks are preserved in the Precambrian Bass, Hakatai, Dox, and Nankoweap Formations.
Additionally, the well-washed, sublitharenite sandstone, occasional ripple marks in the sandstone, and the preferred orientation of coprolites on the bedding plane, all point to periodic moderate-to-high energy conditions.
"The clincher for some of the water being on the surface is crossbeds and ripple marks in the rocks," says Mars rover project scientist Joy A.
The pattern of ripple marks and other features locked in southwestern Utah's sandstone indicates that the mineral grains had been blown in from those directions.
Schlieren exhibit layering similar to cross-bedding and preserve ripple marks along their base.
Canyon walls may also contain other structures, such as fossilized ripple marks. These marks, which look just like ripples in the sand on a beach, occur when ancient streambeds have been converted into rock and petrified.
The sedimentary structures noticed include laminations, cross bedding, ripple marks, burrows, liesgang rings (?) and graded bedding.
Key features of these specimens include flaked surfaces running in two or more directions and ripple marks, cracks and protrusions clearly resulting from the impact required to detach flakes from stone.
Mark and Ali (1961) and Ali (1962) studied the Tanawal Formation near Tarbela as well in the presently studied area and described preponderance of well- bedded quartzites with excellent cross bedding and ripple marks. Calkins et al.
Photos from underwater cameras showed that these storms erased animal tracks and created ripple marks in the sediments.
Bioturbation, ripple marks and mudcracks are observed in Mianwali Formation, while cross bedding is dominant in the overlying Tredian Formation.