Blog Profile / Arizona Geology


URL :http://arizonageology.blogspot.com/
Filed Under:Academics / Geology
Posts on Regator:2266
Posts / Week:4.6
Archived Since:March 16, 2008

Blog Post Archive

Remembering M. Lee Allison: one year later

Lee Allison examining a diversion ditch, Flagstaff, AZ. A year ago today Lee Allison, Director of the Arizona Geological Survey and State Geologist, passed away 3 days after suffering a tragic accident at his home. We cannot adequately express the scope of this tremendous loss to the AZGS and staff members. Show More Summary

Eldred Dewey Wilson & the Proterozoic ‘Mazatzal Revolution’

Study area map of Wilson (1937) In 1937, geologist Eldred Dewey Wilson coined the phrase ‘Mazatzal Revolution’ to describe mountain building along the western edge of the North American craton. While the Mazatzal Revolution occurredShow More Summary

Important San Pedro River Subflow Adjudication Ruling!

By Order dated July 13, 2017, Maricopa County Superior Court Judge Mark H. Brain (presiding judge in the Gila River adjudication) affirmed the most recent effort by the Arizona Dept. of Water Resources (ADWR) to delineate the lateral extent of certain hydrogeologic areas known as subflow zones in the San Pedro River watershed in southeastern Arizona. Show More Summary

Hypothetical Earthquake Scenarios: A planning tool for civil authorities

USGS hypothetical earthquake scenario map tool. The US Geological Survey just released an online interactive map tool that showcases earthquake event scenarios for select faults in the contiguous U.S. Their objective: "to convey event locations, rupture areas, and shaking for hypothetical earthquake scenarios." This is a great idea. Show More Summary

That sinking feeling: State-of-art technology at work on Arizona subsidence finds you’re not imagining it

Satellite-based tech employed by Arizona Water Resources has found more than 3,400 square miles of land subsidence in the state Arizona is sinking. Well, not all of Arizona, just certain groundwater basins in south-central and southern Arizona. Show More Summary

Out of the wildfire and into the flood - Arizona Summer 2017

Dragoon Mtns of southeastern Arizona, June 2017 After several quiet years, Arizona has had a very active wildfire season. Halfway through 2017, just over 352,000 acres have been burned in Arizona by wildfires of >100 acres in size (Inciweb for Arizona: https://inciweb.nwcg.gov/state/3/). Show More Summary

BLM invites comments on ‘pozzolan’ mine in Skull Valley, central Arizona

Pozzolan deposit of southern California. The Bureau of Land Management’s (BLM) Hassayampa Field Office recently received a Draft Mining and Reclamation Plan of Operations from Kirkland Mining Company for developing a high quality pozzolan...Show More Summary

Global Tectonics and Marine Animal Diversity

Arizona Geological Society - 11 July 2017. The Society's July's dinner meeting hosts speaker Dr. Andrew Zaffos, Arizona Geological Survey (AZGS), discussing the role of global tectonics on marine animal diversity. Andrew joined AZGS in June 2017 to replace Steve Richard (retired Dec. Show More Summary

Following a trail of galena and cerussite mineral flakes to track Zuni and Pueblo potters from AD 1275 - AD 1670

Southwestern North America (D. Rumsey Collection) “ I am an archaeologist who uses lead isotope analysis to source the ores used to make glaze paints on pre-contact and early historic Pueblo glaze painted pottery.”, was the introductory...Show More Summary

Touting the contribution of geoscience to the Arizona economy

Page 1 of 2 page Geoscience and Arizona. How do you quantify the impact of geology and the geoscience community on the health and vigor of a state’s economy? That’s no small task, but the American Geosciences Institute, an umbrella organization...Show More Summary

Revisiting interactive geochemical & mineralogic maps for soils of U.S.

Copper in soil at 0-5 cm depth From 2007 to 2010, the U.S. Geological Survey collected soil samples from 4,857 sites throughout the conterminous United States to support the North American Soil Geochemical Landscapes Project. Hematite...Show More Summary

Building a statewide inventory of landslides in Arizona

Landslide data included in AzSLID AZGS's ' Building a Statewide Inventory of Landslides in Arizona' is now available on line courtesy of the North American Symposium on Landslides and AEG. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1717...Show More Summary

AZGS at 3rd Annual North American Symposium on Landslides – “Slip Slidin’ Away”

Quaternary landslides (red) near I-17 in central AZ (AzSLID). Ann Youberg, Senior Research Scientist who oversees the AZGS geologic hazards group, will be participating in the North American Symposium on Landslides in Roanoke, Virginia, next week. Show More Summary

Arizona National Monuments currently under review by the Secretary of the Interior

AZGS OFR-04-2017 On 26 April 2017, President Donald Trump signed an executive order to review designations of a number of national monuments established under the Antiquities Act of 1906. Section 2 of that executive order requires the...Show More Summary

AZGS receives $64k to update and publish digital geologic map data

Digital geologic map for Dome Rock, Arizona The AZGS was notified last week that we will be receiving $64k from the National Geological and Geophysical Data Preservation Program, administered by the USGS, for FY18. We will be supplying the required state match, for a project total of ~$130k. Show More Summary

AZGS mine files spurs silver exploration in Arizona’s Plomosa Mountains

Ramsey Mine ca. 1987 Imagine a room crowded with file cabinets whose drawers are stuffed with 100,000s of pages of unpublished mine reports, correspondence, geologic maps, mine maps, drill hole data, rock chemistry, and assay results for more than 20,000 mines in Arizona. Show More Summary

Revisiting the 2006 debris flow of Santa Catalina Mountains

Bouldery debris flow levee, Santa Catalina Mtns. Historic rainfall precipitates 100s of debris flows | For five days in late July 2006, the mountains of southern Arizona received unusually heavy rainfall. A final burst of precipitation on the morning of 31 July produced over 400 hillslope failures in the Santa Catalina Mountains of Pima County (Fig. Show More Summary

Zn-Pb-Ag Mining Prospect in Patagonia Mtns, AZ: Ramping up!

Drilling at Taylor Deep. (Courtesy of Arizona Mining) According to a story in the Northern Miner, Arizona Mining is planning for substantial Zn production, ~ 9,100 tonnes ore/day, as early as 2020. Pending permitting. The Taylor Deep...Show More Summary

Update: Arizona Reservoir Volume Status Spring 2017

As we head into summer here is a quick look at the state of Arizona's reservoirs at the end of February 2017. It was a good winter for recharge and the smaller reservoirs are faring well. Not so much, the Colorado River's Lake Mead and Powell. Reservoir data courtesy of CLIMAS - Climate Assessment for the Southwest. Posted 5/15/2017

Trump Exe. Order could impact four AZ National Monuments

On 26 April 2017, President Trump signed an executive order requiring the Department of the Interior to review national monuments comprising more than 100,000 acres and created since 1996. This review involves 20 national monuments. Physiographic features of Vermilion Cliffs Natl. Show More Summary

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