Tag Archive: geology

A slice of fossilized tree with opal growth in the rings.

This is the Richat Structure seen from the ISS. It’s in Mauritania, in the Sahara desert. Photo by Dutch astronaut Andre Kuipers.

An Ethiopian welo opal. Looks like an underwater scene.

Another Ethiopian opal.

An Ethiopian opal geode.

The Devil’s Den in Gainesville, Florida, photographed by Indie House Films.


Secrets of the Ocean Floor

Continental drift is common knowledge now, but when the idea was first proposed it was revolutionary. The maps of one of history’s finest cartographers shifted our view of the planet.

Popular scientist Hashem Al-Ghaili posted a captivating video of divers swimming in the Silfra Fissure in Iceland.

Last of the boulder opals.

boulder opal

This boulder opal appears to be a glistening stream.

boulder opal stream

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