EOS 110 Lecture Notes - Lecture 4: Cross-Bedding, Surf Zone, Terminal Velocity
30 Dec 2016
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Precipitate from chemical reactions between sea water and rocks/minerals. Note: focus is on a neritic environment (beach and continental shelf) Determine the relative proportions for each class side of sediment samples. Large particles settle faster than finer sediments. Lower frictions from lower surface area to volume ratio. Stokes law: i the settling velocity of a given particle is a function of the its diameter ii v = cd2 iii this formula neglects: Density and viscosity affected by temperature or other suspended material. Turbulence slows particles rate of fall (mainly for large particles) High density (specific gravity) particles will fall faster. Intensity of transport and/or length of time the grain was subjected to turbulence and/or abrasion. Range of grain sizes within a sediment sample. Wherever a river encounters standing bodies of water. Deposition rates exceed the ability of long shore drift to remove sediment load. Sudden decrease of energy causes rive to drop its sediment load.
