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Asarco to layoff 160 in Arizona due to copper price plunge

Asarco is laying off 160 workers, with 130 at the Hayden and Ray operations and 30 at the Mission mine [right, credit, Asarco], due to the drop in copper prices. Asarco's announcement stated:Last week Asarco gave notice to union representatives...Show More Summary

How Did Fish Get into the Desert of the Basin and Range Province?

13 hours agoAcademics / Geology : Geotripper

Source: "Pleistocene Lakes and Rivers of Mojave" by Philip Stoffer (14 January 2004). Changing Climates and Ancient Lakes (.html). Desert Landforms and Surface Processes in the Mojave National Preserve and Vicinity. USGS, US Department of the Interior. Show More Summary

State agency transition documents posted online

Prior to the November election, former Governor Jan Brewer directed a number of state agencies, commissions, and boards to prepare reports for the incoming governor and his administration. The transition documents describe not only a...Show More Summary

Small quake south of Kingman

A magnitude 2.8 earthquake struck at 5:17 pm on Sunday, about 21 miles SSE of Kingman. [Right, orange star marks epicenter. Credit, USGS]

Arizona SciTech Fest underway with events statewide

This year's SciTech Festival launched on January 30, with a splash of events around the state. A sampling of upcoming events is below. The full list online at azscitech.com/events. - Gila Valley Health, Safety & Science Festival, Graham...Show More Summary

Where the River No Longer Runs, Life Persists: Fossil Falls in the Eastern Sierra Nevada

Red Hill near Fossil Falls, with the crest of the Sierra Nevada in the distance. The Sierra Nevada is the largest single block of rock in the United States. It takes the shape of a huge 400 mile long westward tilting range reaching elevations exceeding 14,000 feet. Show More Summary

Solar farm on mine lands is biggest in region - expect more to come

I had the pleasure of giving brief remarks at the formal ribbon cutting of the 35 megawatt Avalon Solar facility near Sahuarita on Friday [photo credit, TEP]. The plant will reach 56 MW later this year, making it the largest solar resource in Tucson Electric Power's territory. Show More Summary

Arizona favorability rises in mining industry perceptions

The Fraser Institute’s 2014 survey ranking jurisdictions worldwide for their favorability for mining has just been released. “Since 1997, the Fraser Institute has conducted an annual survey of mining and exploration companies to assess how mineral endowments and public policy factors such as taxation and regulation affect exploration investment. Show More Summary

Geochronology Short Course at GSA 2014

As a graduate student in 2005 I was lucky enough to attend a Thermochronology Short Course sponsored by the Mineralogical Society of America. It was a 2 day event at Snowbird, a ski resort outside of Salt Lake City, just … Continue reading ?

The Hot Hand, Freakonomics, Climate Denial, and Closure Temperatures – Assumptions in Models

I started listening to a few sports podcasts rather religiously about 3 years ago. I self select for shows, avoiding anything that involves someone with a nickname or who yells all the time, basically avoiding anything that takes sports too … Continue reading ?

Barren Cliffs Reveal a Rich and Violent Past: Red Rock Canyon State Park

Deserts have such a fearsome reputation around the world, but deserts can be both beautiful and at certain times of the year a pleasant place to visit. The dry lands of the American Southwest are no exception. For geologists, the treat...Show More Summary

The Partial Retention Zone

One of the most important concepts in thermochronology is the Partial Retention Zone (PRZ for short, referred to as the Partial Annealing Zone in the fission-track world). The term PRZ is used to refer to a variety of things, all ??? Continue reading ?

Things to Listen To Update

A while ago I posted about what I like to listen to when doing the inevitable important-but-dull tasks that occur all of the time in science. As an update, I’ll just link to a recent Slate article rounding up their … Continue reading ?

Reflections on Thermo 2014 in Chamonix

I know that meetings are different from vacations. Meetings are busy, and even when they are in fantastic places, you rarely see more than the convention center and a few restaurants within walking distance. In addition, you usually don’t get … Continue reading ?

The Heartland Institute: Comically Ignorant Poop Factory or Greedy Lying Dumbasses?

Ignorance is the fifth horseman of the apocalypse. In many ways it should be the main one, seeing as it is ignorance that is the root cause of so much of the evils assigned to the better-known four. I am not of … Continue reading ?

Climbing Up the Middle of a Pluton

I am by no means a climber, but I love rocks and have a great appreciation for people who choose to spend hours and hours with their faces inches away from rocks. I have climbed a few times, and I really got a kick … Continue reading ?

All Salt is Sea Salt

OK I’ll put an asterisk in the title because I suppose some salt can come from dried up lake beds but really, doesn’t this drive other geologists nuts? This afternoon I was following a recipe that suggested I use Himalayan … Continue reading ?

A Different Kind of "Snow" in California, and a Coming World of Hurt

There is a different kind of snow falling in California right now. It might look vaguely like that cold stuff that has been falling back east, but the resemblance stops at "white". The almond orchards of the Great Valley have been blooming...Show More Summary

Index of Arizona geologic maps published for 1925-2015

The Arizona Geological Survey just released a geologic map index by staff geologists Jon Spencer and Steve Richard comprising maps that are available from the AZGS’ online Document Repository. The index includes the citation, location...Show More Summary

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