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rock chip to thin section (pan)

Rock chip, thin section, and photomicrograph of a piece of sidewalk concrete. Note the myriad plagioclase crystals in the volcanic pebbles. (sidewk2412)

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Discarded concrete and lake, Oregon

Discarded block of concrete on the shoreline of Dorena Reservoir, Oregon (IP2412-7131)

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photomicrograph of basalt

photomicrograph of basalt pebble in concrete. Note the myriad plagioclase crystals and the brown-colored cement. (IP2412-7117c)

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Aggregate and cement in concrete

Aggregate and cement in sidewalk concrete, Eugene, Oregon. (IP2406-5351)

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Western and High Cascades, Oregon

Aerial view of Hills Creek Reservoir in Oregon’s deeply eroded western Cascades. Active volcanoes of the High Cascades on the horizon. (190925-273)

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flowing water on salt pan, Death Valley, CA

Small streams on salt flats, Death Valley National Park, California (240504-12)

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spit, made of salt, Death Valley, CA

Salt spit, consitructed of recently precipitated halite on the floor of Death Valley, flooded during Hurricane Hilary, August, 2023, Photo taken in January, 2024. The resulting lake was often called “Modern Lake Manly”. Death Valley National Park, California. (240108-102)

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Flooded salt pan, Death Valley, CA

Recently precipitated salt and flooded salt flats, Death Valley National Park, California. “Modern Lake Manly” –one of the effects of Hurricane Hillary of August, 2023. Photo taken in January, 2024. (240108-78)

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Isoclinal fold and cleavage, Alaska

Upright Isoclinal fold and slaty cleavage, SE Alaska (150617-37)

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Isoclinal fold and cleavage, Alaska

Upright horizontal Isoclinal fold and slaty cleavage, SE Alaska (150617-35)

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Death Valley, CA

View south into Death Valley of Death Valley National Park, California. Note antiform on left side of photo. Keane Wonder Mine area (241117-62)

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Lake-bed deposits

Tilted lake bed deposits of the Miocene-Pliocene Furnace Creek Formation, Death Valley National Park, California (241115-47)

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Facies change, alluvial fan to lake

Tilted Miocene-Pliocene sedimentary rock of the Furnace Creek Formation showing a facies change from lakebeds (center, bottom) upwards into alluvial fan deposits. Death Valley National Park, California (241115-46)

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Facies change, alluvial fan to lake (vertical)

Facies change in tilted sedimentary rock: lakebeds grading into alluvial fan deposits. Death Valley National Park, California (241115-41)

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Debris flow deposits

Tilted debris flow deposits in Miocene-Pliocene Furnace Creek Fm., Death Valley National Park, California. (241115-19)

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Inverse grading in debris flow deposits

Tilted sheetflood and fine-grained debris flow deposits of the Miocene-Pliocene Furnace Creek Formation, Death Valley National Park, California. Note the inverse grading in some of the debris flow deposits. (241115-14)

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