hematite

Step up to the ochre

manufacture natural Earth pigmentation

Red ochre the archaic paint manufactured to daub rock art, perhaps highlighting sonic hot spots (archaeoacoustics) in ancient megalithic structures such as Malta’s Hypogeum, the most desired paste to stain skeletons for burial. Why did these skilled people, all around the Earth, perhaps for tens or hundreds of thousands of years, manufacture this pigmentation? This …

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Entrenched horseshoe bends

Horseshoe Bends geology

How are horseshoe bends (entrenched meanders) created in canyons? How are very deep and tight horseshoe bends created in canyons? The most famous known example is called Horseshoe Bend in Arizona and it is a spectacular example of this type of dramatic U bend in the Colorado river. Does the Horseshoe Bend geology with its …

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