sedimentary geology geos 240 – chapter 8 depositional environments part 1 introduction, fluvial...
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Sedimentary Sedimentary GeologyGeology
Geos 240 – Chapter Geos 240 – Chapter 88
Depositional Depositional EnvironmentsEnvironments
Part 1Part 1Introduction, Fluvial & Introduction, Fluvial &
CoastalCoastal Dr. Tark HamiltonDr. Tark Hamilton
Readings from Sediments & Basins: (8:1-Readings from Sediments & Basins: (8:1-67)67)
Camosun CollegeCamosun College
Great Barrier Back Reef, Great Barrier Back Reef, QueenslandQueensland
Branching Corals & Carbonate Sand
Sandy Braided River ModelSandy Braided River ModelBased on South Based on South SaskatchewanSaskatchewan
Flow & AggradationLateral Aggradation
Bars Persist for decades
Anastomosed River ModelAnastomosed River ModelBased on Cumberland Based on Cumberland
Marshes,Marshes,East Central Saskatchewan-East Central Saskatchewan-
ManitobaManitoba
Flow Direction, C
hannel Sands
Crevasse Splay Deposit
Stable Vegetated Marsh
Cutbank, Carboniferous Channel Sand, KYCutbank, Carboniferous Channel Sand, KY
Collapsed & Rotated BlockOf Sandstone that fell
Into the Channel
Box Canyon Cut into Basal Triassic Box Canyon Cut into Basal Triassic Unconformity AZUnconformity AZ
Box Canyon Cut into Basal Triassic Box Canyon Cut into Basal Triassic Unconformity AZUnconformity AZ
Interbedded Floodplain Siltstones & Musdtones Interbedded Floodplain Siltstones & Musdtones w/Channelw/Channel
Thin Floodplain Muds over Sheet Sand, Devonian, Thin Floodplain Muds over Sheet Sand, Devonian, Arctic CanadaArctic Canada
UpwardsFining
Modern Ergs: Eolian DesertsModern Ergs: Eolian DesertsTropic of Cancer & Capricorn ~25°N & S Tropic of Cancer & Capricorn ~25°N & S (Why Here?)(Why Here?)
Continental Interiors & Rainshadows Continental Interiors & Rainshadows (Find 2)(Find 2)
Cyclic Stratigraphy of DunesCyclic Stratigraphy of Dunes
Climate, Sea Level, WT Change
MBS: Deflation, Lags, Ventifacts, Desert Varnish, Blow Outs, Downlap
Slumped Bed on Face of Dune, Navajo Sandstone, ArizonaSlumped Bed on Face of Dune, Navajo Sandstone, Arizona
Deflation Surface Ventifacts w/Desert Varnish GobiDeflation Surface Ventifacts w/Desert Varnish Gobi
Varved Glacio-lacustrine Clay/Silt, Pleistocene, ONVarved Glacio-lacustrine Clay/Silt, Pleistocene, ON
Dropstone(see notes)
South Carolina Barrier Islands Spit Bars, Tide FlatsSouth Carolina Barrier Islands Spit Bars, Tide Flats
Galveston Island & Matagordia Bay, TexasGalveston Island & Matagordia Bay, Texas
What are the green curves?
What is this feature?
Dune & Beach, South Padre Island (Galveston, Texas)Dune & Beach, South Padre Island (Galveston, Texas)
Turbulent Dispersion of Turbulent Dispersion of Shelf MudsShelf Muds
after Hurricane Ida MODIS after Hurricane Ida MODIS 10/10/0910/10/09
Sh
elf
Ida’
sP
ath
See Notes