Sandstone petrography, detrital-zircon U-Pb ages and Hf isotope ratios indicate provenance from the Gangdese arc and the central Lhasa terrane.

All the other data (detrital zircons, shale geochemistry) is analyzed; the sandstone petrography will be done by the end of this week (or maybe next week). I'm not looking forward to it, but I ...

SAND SCULPTURE Sandstone arches such as the 22-meter-long Double O Arch in Utah’s Arches National Park form without chemical glue. Instead, downward forces cause sand grains to interlock.

Sandstone is everywhere in the Silver State, and so was the sand that produced it. For millions of years, much of what is now Nevada was collecting sediment at the bottom of an early Mesozoic ocean.