Obsidian is volcanic glass with a chemical composition similar to that of rhyolite or granite. It is most commonly black, although greenish to reddish and banded varieties also occur. In addition to its dark color and glassy luster, obsidian is...

Obsidian is a type of naturally-occurring glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly through the glass transition temperature and freezes without sufficient time for crystal growth....

Most of the members of Obsidian were barely out of the womb in 1991 when Nirvana's "Nevermind" came out. But the local rockers are on a mission to bring back grunge. Fourteen-year-old singer and drummer Nikk Wolf sounds like the second coming of Alice...

ABSTRACT Exotic lithic raw materials provide insight into exchange relations and mobility of prehistoric populations. Toward this end, obsidian flakes from two western Oneota sites, Warne in north central Kansas and Blood Run in northwestern Iowa, were sourced using x-ray fluorescence spectrometry. With...

Idaho State University anthropologists are retracing American Indian trade routes by bombarding arrowheads and other stone tools with radiation that helps locate their origins.The work at the Idaho Accelerator Center in Pocatello involves a process called photon activation analysis. It allows researchers to measure trace...

Archaeologists diving into a lake in the crater of a snowcapped volcano found wooden scepters shaped like lightning bolts that match 500-year-old descriptions by Spanish priests and conquerors writing about offerings to the Aztec rain god.The lightning bolts _ along with cones of copal incense...