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Fluvial Deposits (Chapter 9)

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    4318
  • Fluvial Deposits at Vasquez Rocks County Park

    VasquezGradedBedding.jpg

    Figure \(\PageIndex{1}\): Graded bedding with faint cross stratification deposited in a fluvial channel

    VasquezDebrisFlow.jpg

    Figure \(\PageIndex{2}\): Debris Flow in a Fluvial Environment

    VasquezGravelChannel.jpg

    Figure \(\PageIndex{3}\): Gravel deposited in a channel​​​​​​​

    VasquezMudCracks.jpg

    Figure \(\PageIndex{4}\): Mud cracks that formed in an overbank deposit


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    Fluvial Deposits Near Oberlin, OH

    OHRiverXStrat.jpg

    Figure \(\PageIndex{5}\): Quarry wall showing fluvial cross stratification, probably due to channel migration and bar accretion.​​​​​​​

    OHRiverXStrat2.jpg

    Figure \(\PageIndex{6}\): Extension of the same quarry wall as above​​​​​​​

    OHDuneChannelXStrat.jpg

    Figure \(\PageIndex{7}\): Large Cross Stratification​​​​​​​

    OHDuneChannelXStrat2.jpg

    Figure \(\PageIndex{8}\): Large Cross Stratification​​​​​​​

    OHUpBar2.jpg

    Figure \(\PageIndex{9}\): Cross stratified sediment deposited by a migrating bar based on the abundance of more planar laminae that would be characteristic of a channel bottom.

    OHUpBar.jpg

    Figure \(\PageIndex{10}\): Different view of the bedform in the previous photo

    OHClimbingDune.jpg

    Figure \(\PageIndex{11}\): Climbing dunes


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    Ancient Fluvial Deposits near Lake Louise, Southern Canadian Rockies

    FluvialX1.jpg

    Figure \(\PageIndex{12}\): Stratification from a migrating bar and subsequent channel fill

    FluvialX2.jpg

    Figure \(\PageIndex{13}\): Stratification from a migrating bar​​​​​​​

    The following photographs were taken by Jeff Mount during the Integrated Watershed Science class trip down the Kaskawulsh River, Yukon (funded by his Roy Schelman chair). This river was dammed by ice from the toe of a glacier, which created a very large lake. The ice dam broke catastrophically, producing a huge flood. The flood waters transported very large volumes of sediment in huge dunes. After normal river processes resumed, the river eroded into the flood deposits, exposing the cross stratification in these impressive dunes.

    AKLakeTerraces.jpg

    Figure \(\PageIndex{14}\): Lake shoreline terraces from the lake​​​​​​​

    AKSandWaves4.jpg

    Figure \(\PageIndex{15}\): Lake shoreline terraces from the lake and cross stratification in the river bank. This cross stratification may have been deposited by the flood waters.

    AKSandWaves3.jpg

    Figure \(\PageIndex{16}\): Remnants of giant dunes that migrated during the flood​​​​​​​

    AKSandWaves.jpg

    Figure \(\PageIndex{17}\): Large dune cross stratification and remnants of giant dunes​​​​​​​

    AKSandWaves2.jpg

    Figure \(\PageIndex{18}\): Large dune cross stratification and remnants of giant dunes​​​​​​​


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