O bsidian—volcanic glass—was a material of choice for prehistoric tool and weapon makers. Determining the age of the objects they left behind has always been a challenge for archaeologists. Several ORNL and University of Tennessee researche...
http://www.ornl.gov/reporter/no7/clock.htm
Extrusive rocks are those formed from magma that reached the Earth's surface. These rocks are also called lavas. Because of their rapid cooling the crystal size is generally very small. In some cases, their cooling occurs so rapidly that cr...
http://www.enotes.com/geology/q-and-a/obsidian-igneaous...
Gavin: I really cannot tell from your picture the state of the pieces you have. I suppose if they are clear and of good quality they might have some value to a jewerly maker. What that value is and how you would sell them though is beyond m...
http://en.allexperts.com/q/Geology-1359/2009/9/obsidian...
I would recommend Summer or a time of year when there is no snow. For the only fact that the rocks would look much cooler if you can see them and they are not buried in snow. An interesting time to visit is in August as well, where there is...
http://www.summitpost.org/trailhead/225861/big-obsidian...
MoTB did really well for an expansion. It was in the top ten in Europe for quite a while. Though an expansion will never do as well as the main title, we are pretty satisfied with how MoTB was received.
http://forums.obsidianent.com/index.php?automodule=blog...
Obsidian Windchimes are made exclusively by my friends and fellow artists, Deborah & Richard Bloom, Portland, Oregon. We have collaborated on the pieces noted and all three of us fully participate in the creation of each one. For more i...
http://www.copperfairies.com/faqs.htm
While working on Obsidian Twilight recently I have had in the back of my mind, “Why don’t I make this 100% completely OGL/D20 Open Content?” For some reason it keeps popping back in the front of my mind over and over. When I first created ...
http://lpjd.blogspot.com/2009/05/should-obsidian-twilig...