The latest in our series of earth fissure maps has been released for the North Sulfur Springs Valley study area in Cochise County in southern Arizona. The map is available for free viewing and download at our online document repository...Show More Summary
The baseball season can't start soon enough for me. Right now, the groundskeepers are at work readying the field of play. And that means their inner geologist is on hand... Read Full Post
Flying back from Alaska on yet another recent trip, I was able to spot Rose Spit, which featured as a Where in the West challenge back in October of 2010. The shape of the northeastern tip of Graham Island — an island in the Haida Gwaii, or Queen Charlotte Islands, off of the coast of British Columbia up near Prince Rupert — always fascinates me. Show More Summary
The annual Survey of Mining Companies for 2013 conducted by the Fraser Institute, ranks Arizona 20th out of 112 jurisdictions worldwide, as a place to mine, based on perceptions by mining executives. In the previous survey, Arizona ranked 28th out of 96 jurisdictions (countries, states, and provinces). Show More Summary
The Head-Royce School occupies a lovely secluded site next to Lincoln Avenue. Naturally, it was once a quarry. Not just any quarry, although its product was ordinary: crushed rock of indifferent quality. It was the quarry for Easton & Wilson, a paving and construction company founded in the late 1890s by Kimball G. Easton and […]
When is the next bathroom? Will there be flush toilets at the campground? What about showers?Geology field tripping in Death Valley National Park in the modern era is a far cry from the adventures of centuries past, specifically theShow More Summary
New research contributes to learning the mechanisms that cause the Earth's plates to move and drift.
New orchard on the California prairie It's a sad and familiar story for California: there is a valuable resource in the ground, free for the taking. There are those who come to exploit the resource, tearing up the land and leaving behind a wake of destruction. Show More Summary
It's been a miserable year, one of the worst on record. For the last year much of California, including my home in the Great Valley, has received an amount of rain more appropriate to Death Valley than to one of the most fertile agricultural regions on the planet. Show More Summary
There is only one Geological Society, the one in London that was founded in 1807. Its highest award is the Wollaston Medal, which goes to "geologists who have had a significant influence by means of a substantial body of excellent research...Show More Summary
Break-up of the supercontinent Gondwana about 130 Million years ago could have lead to a completely different shape of the African and South American continent with an ocean south of today's Sahara desert.
The American Geosciences Institute advises that fifteen organizations have formed the new Mineral Science and Information Coalition (MSIC) to advocate for reinvigorated minerals science and information functions in the federal government. Show More Summary
This week's Geo-Whiz Quiz is the third of four no-holds-barred, mixed-martial-arts General Geology Quizzes, one that only the most polymathic of geophiles will master! Show us your wide intellectual range and your imperturbable aplomb as you take this challenging quiz. Do your worst—I'll bet you will.
Frankly, if we lived next to a major fault zone or an active volcano, the seismic record above on our department seismometer would be worrisome beyond measure. Earthquake after earthquake usually means very bad things, the harmonic tremor leading to a major volcanic eruption or the buildup to a huge earthquake. Show More Summary
We're all taught about the water cycle: that lovely diagram with the sun and the clouds and the rain and the rivers, all carrying water around in a nice loop. I'm happy to tell you that the diagram is still good sound science! However, lately we've learned about a second, tectonic water cycle that goes deep into the mantle. Show More Summary
The lands east of the Sierra Nevada are dry. The massive mountain wall of granitic rock captures the Pacific storms that reach California and wrings the moisture out, leaving barren deserts and culminating in the hottest spot in the world and the driest locality in North America: Death Valley. Show More Summary
The Boy Scouts of America have officially unveiled the first "Mining in Society" merit badge, according to Kelly Norton, head of the Arizona Mining Association."Whether it's the source of the metal in a Dutch oven or the key components...Show More Summary