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Sedimentary Geology Geos 240 – Chapter 8 Depositional Environments Part 2 Barrier Islands & Deltas. Dr. Tark Hamilton Readings from Sediments & Basins: (8:1-67) Camosun College. See Notes. Ravinement: Transgressive Facies Progression. Erosion > Deposition ~10m. Barrier Island/Cay. L1, L2.
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Sedimentary GeologyGeos 240 – Chapter 8Depositional EnvironmentsPart 2Barrier Islands & Deltas Dr. Tark Hamilton Readings from Sediments & Basins: (8:1-67) Camosun College
Ravinement: Transgressive Facies Progression Erosion > Deposition ~10m Barrier Island/Cay L1, L2 Contemporaneous Facies S1, S2 See Notes
Effects of Hurricane Carla1964 onGalveston IslandMudMarshSand
River Dominated Delta, Mississippi Typical of Forced Regression Low Latitudes Low Tidal Ranges
Avusion Nodes & Distributary Switching This is a perspective drawing. The blue lines are all on one plane at sea level, as is the green profile of the seaward edge of the delta. The grade (gray) is a gradual decline in a perpendicular plane above the central blue dashed line. A-C is the shortest & steepest path to the coast & SL. See Notes
Small Distributary Deltas, Mississippi Historic Development:: C) 1838, D) 1862, E) 1871, F) 1891
Prograding Delta Environments Topset, Flat Sands Foreset, Clinoform Silts Bottomset, Flat Clays