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Ronald Bruhn's Snapshots

  1. folded lamination

    folded lamination by Ronald Bruhn from the GigaPan Navajo Sandstone Cliff by Ronald Bruhn

    Ripple lamination folded in lower part of photo causes
    broad upwarp of overlying white sandstone bed.

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  2. Deformed lamintations

    Deformed lamintations by Ronald Bruhn from the GigaPan Navajo Sandstone Outcrop by Ronald Bruhn

    Ripple laminations are turned to vertical within
    apparent apparent breccia or dismembered block layer

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  3. A ancient mariner stranded on a fossil lake?

    A ancient mariner stranded on a fossil lake? by Ronald Bruhn from the GigaPan Galana Boi lake beds, Lake Turkana, Kenya by Ronald Bruhn

    Prof. Frank Brown from the University of Utah provides a handy scale for evaluating the sediment thickness and depth of gullies eroded into the Galana Boil deposits.

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  4. Someone is home!

    Someone is home! by Ronald Bruhn from the GigaPan Lake Turkana in the African Rift System, Kenya by Ronald Bruhn

    Although desolate the lake supports a number of African tribes who live along the shore. Fishing is especially important. Lake Turkana is home ot Nile Perch, and of course, large crocodiles.

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  5. Be Careful!

    Be Careful! by Ronald Bruhn from the GigaPan Lake Bogoria Geysers - East African Rift Valley, Kenya by Ronald Bruhn

    Thermal springs are dangerous - here you can read the warning both in English and Swahili.

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  6. Geyser - Lake Bogoria

    Geyser - Lake Bogoria by Ronald Bruhn from the GigaPan Lake Bogoria Geysers - East African Rift Valley, Kenya by Ronald Bruhn

    This is one of several geysers formed by eruption of boiling water at Lake Bogoria.

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  7. Deformed Cross Bedding

    Deformed Cross Bedding by Ronald Bruhn from the GigaPan Navajo Sandstone Outcrop by Ronald Bruhn

    Crystal Hammers thesis project at the University of Utah is focusing on determining the origin of deformation within the Navajo Sandstone. This snapshot shows one example of deformed cross beds. Cross bedding is formed in sand dunes as sand grains migrate with the wind.

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  8. Geologist at Work

    Geologist at Work by Ronald Bruhn from the GigaPan Navajo Sandstone Cliff by Ronald Bruhn

    Sometimes it hot - somtimes it cold!

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  9. Ancient Foresets

    Ancient Foresets by Ronald Bruhn from the GigaPan Navajo Sandstone - Ancient Sand Dunes by Ronald Bruhn

    The Navajo Sandstone of the western U.S. is famous for its spectacular landforms, color and sedimentary structures. This snapshot shows dune structures formed by motion of sand in the wind.

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  10. Faulted River Channel

    Faulted River Channel by Ronald Bruhn from the GigaPan Indian Canyon, Utah by Ronald Bruhn

    This is one of two large river channel deposits in the image that are encased within the horizontally layered beds of an ancient lake that existed here around 50 million years ago. This river channel was faulted after the channel sandstone and lake beds were buried and turned into rock. The fault is a white diagonal band extending from lower left upwards through the river channel deposit. Did faulting occur when the rocks were being extended or when they were being shortened during mountain building?

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