The building blocks of Kanaka Flats

People think of Jacksonville as a mining town. However the importance of building stones, used to assemble infrastructures in the historic old town, is often overlooked. They’re sort of the “poor children” of geology that pale beside their ostentatious brothers and sisters, gold and silver.

Building stone wasn’t transported far from its source, especially in the past when moving less valuable heavy rocks required more effort. A trip into historic...

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The Rocks Speak: Earth's old wrinkles

The Rocks Speak: Earth's old wrinkles

After an article I wrote about a drive to Eugene and the description of folds north of Roseburg, one astute reader asked, “How come? That is, how does something as solid as rock fold without breaking, and under what conditions can that happen?"

Folds in rock alternate between upward-bowed shapes (called anticlines) and downwarp shapes (synclines).

A good analogy is to push on one end of a throw rug, which forms folds as the rug is compressed. Indeed, most folds form during....

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