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Kyle House's Snapshots

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  1. sand on mud unconformity

    Snapshot Title: sand on mud unconformity
    Taken by: Kyle House

    Image: Late Pleistocene stratigraphy of the lower Colorado River near Laughlin, Nevada (detail)
    Image Owner: Kyle House



    Description:

    Here is the base of a sandy paleochannel cut in bedded red mud.



  2. reworked river gravel in fan deposit

    Snapshot Title: reworked river gravel in fan deposit
    Taken by: Kyle House

    Image: Late Pleistocene stratigraphy of the lower Colorado River near Laughlin, Nevada (detail)
    Image Owner: Kyle House



    Description:

    The underlying fan deposit contains some reworked river gravel from a previous aggradation.



  3. base of sequence

    Snapshot Title: base of sequence
    Taken by: Kyle House

    Image: Late Pleistocene stratigraphy of the lower Colorado River near Laughlin, Nevada (detail)
    Image Owner: Kyle House



    Description:

    The base of the fine-grained sequence sits on paleotopography in moderately indurated fan deposits.



  4. sandy paleochannel base

    Snapshot Title: sandy paleochannel base
    Taken by: Kyle House

    Image: Late Pleistocene stratigraphy of the lower Colorado River near Laughlin, Nevada (detail)
    Image Owner: Kyle House



    Description:

    There are numerous unconformities in this seemingly monotonous sequence. This is one of the really obvious ones.



  5. Locally derived boulder

    Snapshot Title: Locally derived boulder
    Taken by: Kyle House

    Image: Base of the Bullhead alluvium, Laughlin, Nevada
    Image Owner: Kyle House



    Description:

    The locally derived clasts are from Miocene fanglomerate deposits into which this prominent channel is carved. The local seds are the coarsest clasts in the deposit. They are also generally less round...



  6. Intiguing bed near the base

    Snapshot Title: Intiguing bed near the base
    Taken by: Kyle House

    Image: Base of the Bullhead alluvium, Laughlin, Nevada
    Image Owner: Kyle House



    Description:

    Matrix supported bed of gravel.



  7. Polymict 1

    Snapshot Title: Polymict 1
    Taken by: Kyle House

    Image: Base of the Bullhead alluvium, Laughlin, Nevada
    Image Owner: Kyle House



    Description:



  8. Nearly flat-lying sandstone

    Snapshot Title: Nearly flat-lying sandstone
    Taken by: Kyle House

    Image: Newberry Mountain area, Nevada
    Image Owner: Kyle House



    Description:

    Bouse formation sandstone. Interpreted as nearshore deposit associated with late Miocene / early Pliocene lake in Mohave and Cottonwood Valleys. The presence of flat-lying to gently dipping sandstone ...



  9. Quaternary river alluvium

    Snapshot Title: Quaternary river alluvium
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    Sharp unconformity between young Colorado River sediment (maybe 60 ka) and the Bullhead alluvium.



  10. sharp erosional contact

    Snapshot Title: sharp erosional contact
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    The contact between the Newberry gravels and the underlying fanglomerate is very sharp. Note the irregular base of the gravels and look for complex bedding patterns typical of channelized flow deposit...



  11. clasts of megacrystic granite

    Snapshot Title: clasts of megacrystic granite
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    The granite clasts are purple-brown and have large feldspar crystals.



  12. Bullhead Alluvium

    Snapshot Title: Bullhead Alluvium
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    The Bullhead alluvium is the first (thus oldest) Colorado River deposit in the valley. It fills deeply gouged erosional topography that cuts across all older units. Exposures just down the gulch in th...



  13. The Newberry Gravel

    Snapshot Title: The Newberry Gravel
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    The Newberry gravel occupies distinctive paleochannels that truncate the underlying fanglomerate, which has the same clast composition. The orientation of the paleochannels is roughly perpendicular to...



  14. The Pyramid Gravel

    Snapshot Title: The Pyramid Gravel
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    The Pyramid Gravel is a nearly monomictic cobble-boulder conglomerate (a coarse gravel deposit dominated by clasts of a single composition) that records the catastrophic failure of a bedrock divide be...



  15. Bouse Formation

    Snapshot Title: Bouse Formation
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    Calcareous, chalky mud of the Bouse Formation (the Bouse limestone or Bouse marl). This key unit marks the existence of a large lake that filled the valley immediately prior to the development of the ...



  16. Pliocene river gravel lens

    Snapshot Title: Pliocene river gravel lens
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    Interesting 'football' of cemented pea gravel. This is part of the Bullhead alluvium which dates to between 5.59 and 4.1 million years old.



  17. Bouse Formation

    Snapshot Title: Bouse Formation
    Taken by: Kyle House

    Image: Birth of the lower Colorado River near Laughlin Nevada
    Image Owner: Kyle House



    Description:

    Calcareous mudstone and sandstone of the Bouse Formation



  18. Bouse Formation sandstone.

    Snapshot Title: Bouse Formation sandstone.
    Taken by: Kyle House

    Image: Newberry Mountain area, Nevada
    Image Owner: Kyle House



    Description:

    Highest unequivocal outcrop in this image.



  19. Bouse Formation sandstone

    Snapshot Title: Bouse Formation sandstone
    Taken by: Kyle House

    Image: Newberry Mountain area, Nevada
    Image Owner: Kyle House



    Description:

    flat-lying to slightly east-dipping sandstone beds of the Bouse Formation. Here they are at approximately 1760 feet.



  20. Nearly complete, intact section

    Snapshot Title: Nearly complete, intact section
    Taken by: Kyle House

    Image: Holocene Stratigraphy Detail. Truckee River, Sparks, NV
    Image Owner: Kyle House



    Description:

    This interval shows a pristine section with only minor agric. disturbance. The thick sand bed over the prominent white bed is obvious, as the organic muck overlying the sand, etc.



  21. unconformity

    Snapshot Title: unconformity
    Taken by: Kyle House

    Image: Holocene Stratigraphy Detail. Truckee River, Sparks, NV
    Image Owner: Kyle House



    Description:

    The stratified interval that comprises most of the base of the exposure is overlain by a thick bed of fluvial sand. That, in turn is overlain by an irregular interval of organic sed and roots that may...



  22. sediment lens

    Snapshot Title: sediment lens
    Taken by: Kyle House

    Image: Holocene Stratigraphy Detail. Truckee River, Sparks, NV
    Image Owner: Kyle House



    Description:

    intriguing lens with tephra? overlain by organic mud...



  23. tephra?

    Snapshot Title: tephra?
    Taken by: Kyle House

    Image: Holocene Stratigraphy Detail. Truckee River, Sparks, NV
    Image Owner: Kyle House



    Description:

    I am yet to sample this conspicuously white horizon that overlies a conspicuously dark gray horizon.



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