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Approach to Titus Canyon: To Red Pass

It looks to me like you can see Quail Rock from White Pass! We've gone over White Pass—btw, here's a gigapan looking west from White Pass—and we've gone across the flats in the east fork of upper Titanothere Canyon. The road has become...Show More Summary

The Hawai'i That Was: How Can the Biggest Mountain in the World Stay So Hidden?

Mauna Loa from the Mauna Kea Road near the Onizuka Center The answer is easy: clouds. This whole post is a temper tantrum, a tantrum that resulted from the fact that we were on the Big Island of Hawai'i, the site of the biggest mountain on planet Earth, for nine days a few weeks ago. Show More Summary

An icon lost: The Hayward fault’s Rose/Prospect curb

Certain places are prized by geologists, especially teachers, for their educational value. Out-of-towners make pilgrimages to them. Sure we all enjoy the Grand Canyon, but real geologists have Siccar Point, Darwin’s outcrop, the Carlin unconformity and other obscure sites on their life lists. One of those places was right nearby in Hayward, until very recently. […]

The Hawai'i That Was: Living on Uncertain Ground - The First Human Wave Arrives

The southeast coast of the Big Island of Hawai'i is a barren blasted land. One can blame it on the lack of rain, but though it is arid, rainfall is plentiful enough to support forests nearby. One only needs to look up the Holei PaliShow More Summary

Letters, op-eds, and blogs express concern over defunding of geological survey

Geologists and geology advocates are making their opinions known about Arizona Gov. Doug Ducey's government consolidation decision to defund the Arizona Geological Survey as of June 30. The AZGS duties have been handed over to the University...Show More Summary

The Hawai'i That Was: Pu'u O'o, the Volcano We Couldn't See

The Pu'u O'o cone from above Hilo Disclaimer: This is NOT happening right now! These pictures are from 2009.Pu'u O'o is the invisible volcano on the Big Island. It's been the center of eruptive activity for much of the last thirty years, but there are very few easily accessible localities from which it can be seen. Show More Summary

AZGSexit moves forward

As Britain exits the European Union, the Arizona Geological Survey is exiting Arizona state government for a new future as a research and service center at the University of Arizona. We have one year of partial transition funding toShow More Summary

The Hawai'i That Was: Walking a Lake of Fire in "the Little Source of Great Spewing"

Kilauea Iki eruption in 1959. The prevailing winds caused debris to pile up behind the fountain, forming the Pu'u Pau'i cinder cone. Source: US Geological Survey Kilauea is one of the five major shield volcanoes making up the Big Island of Hawai'i. Show More Summary

Nyal Niemuth, the eyes and ears of Arizona mining, retires after 35 years

Nyal Niemuth retired yesterday, after more than 35 years with the State of Arizona, most with the Dept. of Mines & Mineral Resources, and the last 5 years with AZGS after the two agencies were merged. [Photo credit, Mining Foundation of the Southwest]Nyal served as Chief Engineer at ADMMR and became Chief of the Economic Geology section at AZGS. Show More Summary

The Hawai'i That Was: The Abode of the Gods and Creation at Kilauea

The ongoing eruptive activity at the summit caldera of Kilauea on the Big Island of Hawai'i. You aren’t hearing this from me (well, okay, you are), but sometimes teaching is just a little bit like carnival barking. You have to be entertaining about something that actually isn’t all that unusual or interesting. Show More Summary

Crowds swarm AZGS library to pick up publications and maps

AZGS opened its Tucson library, publications storeroom and topographic map room to the public today to take anything they wanted before the office closes next week to move to the University of Arizona. Geologists, mining engineers, teachers,...Show More Summary

Impacts reported on the downsizing, transfer of AZGS

As AZGS shuts down our publicly accessible geological libraries in Phoenix and Tucson, "The public sphere of knowledge, the one that anyone can access, shrinks. The private sphere grows and becomes available only to insiders or those who can pay the price" according to a column by Tim Steller in today's Arizona [Tucson] Daily Star. Show More Summary

Approach to Titus Canyon: Up and Over White Pass

Getting past Tan Mountain on the trip down the Titus Canyon road always feels like a milestone to me, not so much because the road gets better—it maybe does get better, for a while, or maybe I just get used to the washboard—but because I've finally made it past the Amargosa Desert into the Grapevine Mountains. Show More Summary

Scenes from a Strawberry Solstice on the Tuolumne River

Tonight was a unique astronomical event, a Strawberry Moon on a summer solstice, the first since I was a child back in 1967. There's nothing significant in this other than human number-keeping, but it seemed as good an excuse as any to head out to our new river park on the Tuolumne and enjoy the sunset. Show More Summary

AZGS's "Arizona Experience" store closing Friday - everything 50% off

The Arizona Geological Survey store closes on Friday, so we are trying to sell off as much of our inventory, including AZGS publications, as we can. After that, the fixtures will be moved to the former mining and mineral museum to form the basis for a gift shop/book store when that facility is eventually re-opened.The store is at 416 W. Show More Summary

Faceted spurs along the Hayward fault

A lot of geology involves glimpsing the ideal behind the real. As you look around Oakland, the Hayward fault isn’t easy to see without a bit of training. For this post, let me start you from the ideal. The process of faulting has very specific effects on the land that you can learn to look […]

The Hawai'i That Was: The Beginning of All Things, (Ba)salt of the Earth

There are lots of places that are associated with a particular kind of rock. There's the granite of the Sierra Nevada, or the sandstone of Zion National Park. Geologists think Franciscan graywacke sandstone when someone mentions the California Coast Ranges. Show More Summary

Cyprus Pima Mine mineral display loaned to Patagonia Museum

Volunteers dismantled the mineral display at the AZGS office in Tucson today to move it to the Patagonia Museum. The giant display case has showcased the Cyprus Minerals Pima Mine mineral collection which will be on long term loan in Patagonia. Show More Summary

Online version of "Ores & Orogenesis" drawing lots of views

We posted the Ores and Orogenesis: Circum-Pacific Tectonics, Geologic Evolution, and Ore Deposits, Arizona Geological Society's Digest 22, online on Friday but have not formally announced it, other than a Facebook post that said ‘Coming...Show More Summary

AZGS is handing off maps and books

We are making progress in finding homes for many of the historical materials in the AZGS library in preparation for closing the Tucson headquarters and relocating to the University of Arizona.We have over 21,000 copies of topo maps covering...Show More Summary

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