Sand and Ripples in the Pee Dee River

Ripples are periodic waveforms throughout the natural environment. These subaqueous asymmetrical wave ripples in sand under the Pee Dee River in North Carolina are created by oscillatory wave motions normal or slightly oblique to the shoreline.

shoreline features on the Pee Dee River, Morrow Mountain State Park, NC

Sand bar, shore line, subaqueous ripples and tree stump on the Pee Dee River, Morrow Mountain State Park, NC. This photograph ©Andy R. Bobyarchick.

Needle Ice: A Gallery

This gallery contains 11 photos.

Needle ice forms in porous, wet soil or sediment when the soil temperature is above freezing and the surface atmosphere temperature is below freezing. Permeability is important. Capillary action pulls water up toward the surface where the water freezes at the bases of growing ice crystals. The growing crystals are…

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Needle Ice in a Loamy Soil

Needle ice in a loamy soil in a schoolyard near Salisbury, NC. The individual particles on top of the needles are coarse sand in size. Needle ice forms when soil water moves upward under capillary pressure and freezing when it contacts cold air. I will be posting a gallery of images with context on my blog soon. (The server is having intermittent problems right now.)

Tectonic Architecture

“Tectonic” as an adjective or “tectonics” as a noun refers to the large-scale structure of Earth’s crust and lithosphere. Outside of geology, the word tectonic may refer to a building or construction. The concept arrived in geological sciences prior to “plate tectonics”, mainly with application to  mountain building. The word…

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Facebook Images

I lack enough creativity to distribute my photographs in some intelligent way, so you can find a number of photo albums on my Facebook page. Here’s a current list of the main albums below. The links will transport you to the relevant album. Many of the images don’t have much…

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First Post

More or less. There were posts to an earlier version of the Geologist’s Pick back when it was partly designated to service a university-level class. (See the Colophon for a little history.) That was before Facebook, Twitter, and the tsunami of social media onto our shores. This site – it’s…

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