All Blogs / Academics / Geology / Popular

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

The Hawai'i That Was: Why Should We Care?

Lapakahi State Park on the Big Island is the remains of an ancient fishing village that was occupied for hundreds of years. Not a single plant in the picture is native to Hawai'i. In a lot of ways, a post like this is how one might wrap up a series. Show More Summary

Friday Field Photo: Cannonball Chert

Back in my eastern Nevada field days, I was lucky enough to go on a stratigraphy tour that took me to several good examples of chert nodules in the mostly Pennsylvanian Ely Limestone. Nicely spherical chert nodules in the Ely Limestone, with 2.5 lb sledge for scale. Show More Summary

The Hawai'i That Was: To know what was we need to know Hawai'i today

Na Mokupuni O Hawaii Nei-Kalama 1837 (Source: To understand the Hawai'i that was, we need to know the Hawai'i that is. There can be a bit of confusion among travelers who haven't done their research before buying tickets. Show More Summary

The Hawai'i That Was: A New Blog Series

Source: There's a rock in the sea about 500 miles northwest of Honolulu. It's about as far removed from the beaches and high-rises of Waikiki as any place on Earth can be. It's called...Show More Summary

The Approach to Titus Canyon: Tan Mountain

On our ongoing journey into Death Valley via Titus Canyon, we've left behind the Original Bullfrog mine (which can be seen from the road if you know where to look) and have made it past the eastern boundary of Death Valley National Park. Show More Summary

Volunteers show up in force to preserve AZGS library

Our volunteers showed up in force today to empty the library shelves in the AZGS Phoenix in preparation for moving everything into storage in the old mining and mineral museum later this month.The group did an amazing job of getting the entire library and remaining files loaded onto rolling carts and all the shelves dismantled. Show More Summary

A look at serpentinization

Joaquin Miller Park contains excellent examples of serpentinite. This large boulder, placed by the park entrance, is a textbook example of how this rock type forms. (Click the photo for a 1000-pixel version.) Serpentine rock starts out as peridotite (“per-RID-a-tight”), a very important rock type that is rarely seen because it composes most of the […]

Getting ready to move AZGS's Phoenix mining files and library into storage

We will be packing the AZGS Phoenix office library and files starting Monday to move them into storage at the old mining and mineral museum near the Capitol.Volunteers will be coming in throughout the week to help pull volumes off shelves into rolling gondolas. Show More Summary

Copyright © 2015 Regator, LLC