Photographer's Note

The best way to view the pictures is to use the 3 links below.

Basalt Stuctures I

Basalt is a igneous rock formed during the rapid cooling of lava after in volcanic eruptions.
The solidification of the basalt takes place at the surface of the earth.
Due to the rapid cooling, no large crystals have formed, however, by rapid solidification cracks appear, so-called "Joints". These joints don’t appear by movement of the earth's crust but as result of temperature tensions in the igneous rock.
This phenomenon often results in the Jointed basalt columns as seen in my previous post.

In this presentation, and if there is interest in it also in the next post, I show you which further detailed pictures of the crack patterns.

■ Main picture: ◄ Slices ►
■ Workshop 1: ◄ Scratches ►
■ Workshop 2: ◄ Ceiling of the cave ►

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Additional Photos by Rob Zwemmer (alvaraalto) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4791 W: 320 N: 7887] (31228)
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