Obsidian Butte at the southern shore of the Salton Sea illuminated by a setting 16% moon (out of frame). I had hoped to shoot the Milky Way here, but the light pollution was far worse than I had anticipated. Obsidian is produced when magma cools very suddenly so that there is no time for mineral crystals to form. The resulting rock has a structure similar to glass. In ancient and modern times obsidian has been honed into ultra-sharp arrowheads, knives, and cutting tools.
Panorama of an abandoned boat and a portion of the shoreline of Bombay Beach at the Salton Sea. To produce this panorama, I combined 28 overlapping vertical frames shot at 0.4 sec f/8 ISO 320 with a Canon 6D and Sigma 15mm EX DG lens.
Obsidian is produced when magma cools very suddenly so that there is no time for mineral crystals to form. The resulting rock has a structure similar to glass. In ancient and modern times obsidian has been honed into ultra-sharp arrowheads, knives, and cutting tools.
