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Cliffs of the Ruby Mountains: Some Pretty Pictures

And while we're waiting an even longer time for me to get around to posting about the nappe in Lamoille Canyon, here are a few of my favorite pretty pics taken from our campsite at Camp Lamoille in late September. I can say that a bit...Show More Summary

EPA open house and public hearing on Florence Copper in situ recovery project

The US Environmental Protection Agency has scheduled an open house and public hearing on the proposed in situ copper recovery operation proposed in Florence. The open house will be held 4-6 pm, January 22, 2015, in Florence High School at 100 S. Show More Summary

The Mills College high-grade blueschist block

Longtime commenter artisancrafts reminded me, in a comment to my last post, that there’s a nice exposure of blueschist at the north edge of Mills College. Yesterday I easily located it by following his/her directions. First there’s the old railbed that once ran to Laundry Canyon. This stretch of it, going down through the Fan […]

AZGS hires first-ever Deputy Director

The Arizona Geological Survey (AZGS) recently hired Chris Hanson as its first ever Deputy Director. Chris joins the AZGS with more than 17 years leadership experience, including senior positions with the American Society of Civil Engineers...Show More Summary

If These Cliffs Could Talk: The Ah-wah-nee, To-tau-kon-nu'-la, and a Different History of the Sierra Nevada

The first question might be "what is that?". It's a pair of climbers, Kevin Jorgeson and Tommy Caldwell, on El Capitan (To-tau-kon-nu'-la) in Yosemite Valley (Ah-wah-nee) who are seeking to do something never before done...a free climb of the one of the most difficult rock faces in the world. Show More Summary

Legislation filed to have AZGS establish a mining and mineral museum

Arizona State Senator Ed Ableser introduced a bill to have the Arizona Geological Survey establish "a mining and mineral museum as the state depository for collecting, cataloging and displaying mining artifacts and specimens of various...Show More Summary

2014 Top Ten Posts at LFD...

...and, like last year and the year before, a few more. And to quote paraphrase myself from last year: Because of the vagaries of stat reporting (in this case, by Google Analytics), I'm listing both the top ten posts for the year (in...Show More Summary

Land of Shadows and Reflections: A Winter Day at Yosemite

Yosemite is simply a magical place. No matter when one visits, something incredible is to be seen. I'm always hard put to select my favorite time of year, but usually the answer ends up along the lines of "whenever I happen to be there" (though crowded, hot, and dry August is probably my least favorite). Show More Summary

Global overview of potash released by USGS

The USGS has released it's long-awaited global review of potash resources. The report, " Potash—A global overview of evaporite-related potash resources, including spatial databases of deposits, occurrences, and permissive tracts." The...Show More Summary

Tucson 2014 Mineral Lecture Series podcasts now online

A series of mineral-collecting talks from the 2014 Tucson gem, mineral, and fossil showcase were recorded by BlueCap Productions and released over the past several weeks as free podcasts. The presentations were originally organized and hosted by the Pueblo Gem & Mineral Show, at their show location just off Interstate 10. The speakers and topics are listed below:

Morenci copper mine expansion one of big mining stories of 2014

One of the biggest Arizona mining stories of 2014 was the completion of Freeport's expansion at the giant Morenci mine. An easy way to appreciate its significance are these excerpts below from pages 10 and 13 of a Freeport presentation last November. Show More Summary

What Defines a Wilderness? Is it the Barrenness or the Richness? The Joe Domecq Wilderness Area and Gold Dredging

A wilderness surprise: Joe Domecq Wilderness Park Wilderness [ wil?d?r nis ]: 1. A neglected or abandoned area of a garden or town. 2. An area essentially undisturbed by human activity together with its naturally developed life community.Can...Show More Summary

We take for granted that the ground beneath our feet is stable

Arizona's Ken Fergason, with AMEC Earth & Environmental, is currently President of the Association of Environmental & Engineering Geologists. He is interviewed in the new issue of International Innovation.Ken notes that "People takeShow More Summary

Meeting a Second Time

So, I met with Dana Hunter, the prolific and excellent writer, who not only has ONE, TWO (count 'em) blogs at two distinct blog networks (Freethought Blogs and the SciAm blog network), but is also (rumor has it) writing other stories, books, and — we hope — field guides (like those in this awesome series). Show More Summary

Copper prices at 4-year low

Copper prices fell on world markets to a 4-year low yesterday, with New York March futures settling at $2.7585 a pound. That's down from $3.38 a year ago.Arizona produces about 2/3 of the copper used in the U.S. and Phoenix-based Freeport McMoRan Copper & Gold is the world's largest primary copper producer, so the price has potentially significant impacts to the economy.

A Stunning Photograph: No Human Has Seen Such a Thing

One of my most vivid memories as a child was the time our family paid a visit to the telescope and observatory on top of Mt. Palomar in Southern California. I'm not sure how old I was, perhaps 8 or so, and I already had a mania for all things astronomy. Show More Summary

A Great Museum for a Great Valley: Support the Museum at the January 17th Gala Event!

Something incredible is about to happen in Modesto. The long-awaited re-opening of the Great Valley Museum in its new home at the Science Community Center is taking place in a few weeks! The new museum is a quantum leap in educational...Show More Summary

One Year Ago Today Compared to Last Month: Mud and Snow v. Mud and Water in the Fernley Wildlife Management Area

A year ago today, a thin snow highlighted some Lake Lahontan shorelines on basalt-capped hills out in (or near) the Fernley Wildlife Management Area (FWMA): Snow on low hills across the dark brown playa in part of the Fortymile Desert on January 5th, 2013. Show More Summary

Middle-Earth Here on our Planet? Some Geo-thoughts After the Last Tolkien Movie

Mt. Ruapahu, an active volcano on the North Island of New Zealand A new world came into being a little over eighty years ago. It formed in the mind of an English scholar, a world with a vivid geography that was populated by a plethora of men, elves, dwarfs, orcs, goblins, dragons, and hobbits. Show More Summary

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