In geology, ripple marks are sedimentary structures (i.e. bedforms of the lower flow regime) and indicate agitation by water (current or waves) or wind.
Read more about Ripple Marks: Defining Ripple Cross-laminae and Asymmetric Ripples, Wave-formed Ripple Marks, Definitions, See Also, References
Famous quotes containing the words ripple and/or marks:
“The forest waves, the morning breaks,
The pastures sleep, ripple the lakes,
Leaves twinkle, flowers like persons be
And life pulsates in rock or tree.”
—Ralph Waldo Emerson (1803–1882)
“Now only a dent in the earth marks the site of these dwellings, with buried cellar stones, and strawberries, raspberries, thimble-berries, hazel-bushes, and sumachs growing in the sunny sward there.... These cellar dents, like deserted fox burrows, old holes, are all that is left where once were the stir and bustle of human life, and “fate, free will, foreknowledge absolute,” in some form and dialect or other were by turns discussed.”
—Henry David Thoreau (1817–1862)