Several billion years ago, the oceans were probably not as hot as often assumed, but were instead at much more moderate temperatures. This is the conclusion of a research team from the University of ...

Your institution does not have access to this book on JSTOR. Try searching on JSTOR for other items related to this book. https://doi.org/10.2307/jj.13609938.4 https ...

L-462 (Onondaga Chert): Not a direct collection from outcrop. Provenience includes gravel deposits. Not a collection from archaeological context. Unknown collection procedure. Collection includes raw ...

SEM and EDX spectrometry were carried out at the Laboratoire de Micromanipulations, de Microanalyses et de Cryo-observation (LAMIC) at GEOTOP-UQAM, using a Hitachi S-4300SE/N with field-effect ...

A million years ago, dry seasons became more frequent and forests retreated before the encroaching savanna. Meanwhile, clustered around a nearby lake, our ancient ancestors fashioned stone tools.

Sutro Tower and the gnarled chert of the Marin Headlandsterrane are parts of a splendid spectacle at San Francisco's Corona Heights. Photos by Andrew Alden. San Francisco is "America's Favorite City" ...

Many of the Outer Wilds mysteries we’ve explored so far have eventually pointed us to the Hourglass Twins, specifically the Ember Twin. There’s a lot to explore here, and not a lot of time to do it, ...

The Rhynie Chert fossil deposit in Scotland is just over 400 million years old and reveals secrets of life’s conquest of the land How life made the move onto land is one of the big questions for ...