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)
“Roll on, thou deep and dark blue Ocean,—roll!
Ten thousand fleets sweep over thee in vain;
Man marks the earth with ruin,—his control
Stops with the shore;”
—George Gordon Noel Byron (1788–1824)