White Sand Beaches
I got a question from Jane who, while reading Marker Bed, became intrigued by the reference to quartz sand on page 29 of the print versions. (By the way, if you have not yet...
Category: Igneous
Obsidian cutting tools
I read an interesting article in the New York Times that discussed the obsidian outcrops in Yellowstone National Park, and how they were mined for hundreds to thousands of years to supply the cutting...
As simple as black and white
I am absolutely convinced that we are all born geologists. I mean, really, what kid doesn’t have a rock collection? Sadly, most of us lose the love by middle school when the burdens and...
