News

Hundreds of obsidian artifacts show how the Aztec Empire evolved
A new analysis of hundreds of obsidian artifacts from the Aztec Empire has revealed the vast trade networks that supplied ...
Obsidian publishes Avowed roadmap, with the Xbox RPG getting arachnophobia mode, New Game Plus, and more
Obsidian Entertainment's Avowed has a roadmap, with arachnophobia mode, New Game Plus, and more slated to arrive for the Xbox ...
Michigan lays claim to oldest rocks in US. Where you can find 3.6 billion-year-old stone
Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here ...
SciELO20d
Titanite U-Pb dating by LA-Quadrupole-ICP-MS: analytical procedures and applications to Rhyacian metamorphic rocks of the Southeastern Guiana Shield
New titanite U-Pb ages identified a late orogenic metamorphic event around 2.05 Ga recorded in an ... Titanite crystals from three rock samples of the SGS (Neoarchean granodioritic orthogneiss – ...
Science News20d
The United States’ oldest known rock has existed for at least 3.6 billion years
A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought. Turns out ...