Yosemite Nature Notes: The Story of the Granite

If you have a few minutes, this is a really nice introduction to the granitic rocks of Yosemite National Park. The interviews include Greg Stock and Allen Glazner, the authors of "Geology Underfoot in Yosemite National Park". Kudos to Stephen Bumgardner, who produced the video!

"I'm a Geologist": Why That's Important

The following words are not mine, but I wish I had said them. Allen Glazner is a professor at the University of North Carolina-Chapel Hill, and a former classmate at Pomona College (in another century). He has written a number of excellent books on the geology of California, including a beautiful book on Yosemite National Park (with Greg Stock). Geology is not about rock collecting, it's about the sustainability of living on planet Earth. This is part of a column from NewsObserver.com. Please give the whole editorial a look.

"If I were to ask average people where gasoline comes from, most wouldn't really know. They might have a mental image, from a children's book, of a black pool of oil underground with a pipe sticking into it, but this is far from the truth. Many think drinking water comes "from the faucet," with little idea of what the source is. The average American home has more than 400 pounds of copper in it. Where does that come from? Even the sources of the sand and gravel vital to construction are a mystery to most people.

Well over 90 percent of the power used in the U.S. comes from fossil fuels and nuclear energy. Thank a geologist - we're the ones who find oil, natural gas, coal and uranium. Even if you think that these energy sources are loathsome, we're stuck with them for some years to come. Geothermal energy? That's an easy one - thank a geologist.

We all take clean, fresh water for granted. Thank a geologist - we find that fresh water and monitor its quality and inventory. Many "green power" devices, such as high-capacity batteries, LEDs and superstrong magnets, depend upon rare, obscure elements such as dysprosium, neodymium and indium. Thank a geologist - we're the ones who know how those elements are cycled in the Earth and where to find them.

The prices of many of these metals, including all that copper in your house, have doubled or tripled in recent years, and the price of oil has quadrupled in the past decade. Business people would benefit from learning a little geology so that they could understand this better.

Geologists are the go-to people for natural hazards. We monitor earthquakes and map faults so that buildings and bridges can be sited as safely as possible. We advise on where to put roads and houses to avoid landslides, and where to put tunnels for roads, pipelines and other infrastructure. We monitor volcanoes for risks to the local populace and aviation. We map areas susceptible to flooding. When the gasoline storage tank at the corner gas station starts to leak, we figure out where that underground gasoline plume is going and how to fix the problem."

Read more: http://www.newsobserver.com/2011/03/05/1029942/geology-can-you-dig-it.html#ixzz1FmXtLCUD . Thanks to Lockwood and Anne Jefferson for the tip.

New Book out on Yosemite Geology!

When I'm not doing other things, most of you know that I love hanging out in Yosemite National Park. I'm happy to report a great new book is out from Mountain Press Publishing Company called Geology Underfoot in Yosemite National Park, by fellow Pomona College alumni Allen Glazner and Yosemite Park geologist Greg Stock. Just got a copy, and I am most impressed. It has been quite a few years now since N. King Huber's book on Yosemite geology was published (the mid 1980's), and Yosemite Underfoot is a great update, and far more comprehensive. It is a series of vignettes of significant geologic spots in the park, but also in the surrounding region, is well-illustrated (in color), and is rich with locality maps and diagrams.

If you are the least bit interested in geology, pick up the book. If you are not interested in geology (which begs the question of why you are reading this) pick up the book anyway. You will become interested in the geology!