GEOL 1330 Lecture Notes - Lecture 8: Ripple Marks, University Of Manchester, Dune
20 Jul 2016
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Document Summary
Features exhibited in sedimentary rocks that form from processes occurring in the environment. Flat surfaces along which rock tend to separate or break. Form when sediment is deposited at an angle. They form from either wind or water movement. Large waves of sand that develop on the surface of sediment layer by moving wind(sand dunes) Small waves of sand that develop on the surface of sediments layer by moving water. Could be either in sand dune or ripple mark. As the current is passing the feature, it"s passing its velocity(1 m/sec), causing the area of the movement gets confined. Slow velocity but when the space gets compromised, the velocity increase when it hit the top point. Reaching the back side, the windward, would decrease the velocity of the current, putting into deposition. This is known as erosion due to the velocity as the sediment are being deposited to the back reached.
