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Ripple Marks

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Ripple Marks 

traces of the motion of water or air currents on the surface of soft coastal sediments of various bodies of water (water ripples) or on an open sand surface (wind ripples). In ancient layers, ripple marks are found on the surfaces of layers of sedimentary rock.
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INTRODUCTION Fossil ripple marks are important features indicative of a specific depositional environment of an ancient basin.
Ripple marks as indicators of Late Ordovician sedimentary ... by Hints, Linda; Miidel, Avo / Estonian Journal of Earth Sciences
Ripple marks on the sandstone indicate the creature was struggling to swim against a current.
Dinosaurs 'were able to swim' by Daily Record (Glasgow, Scotland)
Most of us admit that our very best pictures of rocks were achieved by surreptitiously pointing our cameras over his shoulder when he had carefully selected the right angle to catch the shadows on a mountain range or on a row of ripple marks.
Beauty in the Rocks The Photography of David M. Baird by Neale, E.R. Ward / Geoscience Canada
 
 
 
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