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Fluvial Environments*

  • Page ID
    4067
  • Fluvial Environments

    Fluvial Fan (Alaska)
    Braided River (Alaska)
    Braided River (Alaska)
    Dunes migrating in a creek
    Dunes migrating in a creek
    Antidunes in a creek
    Pebble Scours
    Recent Alluval Deposits (Terrace at Redrock State Park, CA)
    Recent Alluval Deposits (Terrace at Redrock State Park, CA)
    Recent Alluval Deposits (Death Valley, CA)
    Channel Erosion Due to Changing Base Level/Flow Speeds (Death Valley, CA)
    Ancient Trough Cross Stratification (two faces of the same rock)
    Plan or Map View of Ancient Trough Cross Stratification
    Ancient Trough Cross Stratification
    Ancient Trough Cross Stratification
    Fining Upward Fluvial Cycles
    Small Fining Upward Fluvial Cycle
    Single set of cross strata in a planar bed
    Recent Fluvial Deposits (Alsek River, Alaska)

    Fluvial Deposits at Vasquez Rocks County Park:

    Graded bedding with faint cross stratification deposited in a fluvial channel
    Debris Flow in a Fluvial Environment
    Gravel deposited in a channel
    Mud cracks that formed in an overbank deposit

    Fluvial Deposits Near Oberlin,OH:

    Quarry wall showing fluvial cross stratification, probably due to channel migration and bar accretion.
    Extension of the same quarry wall as above
    Large Cross Stratification
    Large Cross Stratification
    Cross stratified sediment deposited by a migrating bar based on the abundance of more planar laminae that would be characteristic of a channel bottom.
    Different view of the bedform in the previous photo
    Climbing Dunes

    Ancient Fluvial Deposits near Lake Louise, Southern Canadian Rockies:

    Stratification from a migrating bar and subsequent channel fill
    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.

    Lake shoreline terraces from the lake
    Lake shoreline terraces from the lake and cross stratification in the river bank. This cross stratification may have been deposited by the flood waters.
    Remnants of giant dunes that migrated during the flood
    Large dune cross stratification and remnants of giant dunes
    Large dune cross stratification and remnants of giant dunes