American Institute of Professional Geologists
Arizona Section Newsletter
Arizona Section Newsletter - December 2017
AZ Section Newsletter - Fall 2016
AZ Section Newsletter - January 2016
AZ Section Newsletter - May 2015
AZ Section Newsletter - November 2014 | AZ Section Newsletter - August 2014
AZ Section Newsletter - November 2013 | AZ Section Newsletter - June 2013 | AZ Section Newsletter - January 2013
AZ Section Newsletter - October 2012
January 2, 2017
AIPG Arizona Section Members: Happy New Year!
I hope you had a wonderful and relaxing holiday.
As we start 2017, I wanted to first introduce you to this year’s AZ Section Officers and key volunteer supporters:
President: Doug Bartlett
President-elect: Tony Dalpiaz
Past President: Rick Smith
Secretary: James Adu
Treasurer: Greg Kinsall
Student Chapter Liaison: Linda Lassiter
NAU Student Chapter Sponsor: Richard Brose
AZ Section Advisors: Barb Murphy, Dawn Garcia
AZ Section Advisor for Field trips: Rob McEwen
I am very excited to welcome a new AIPG Student Chapter from NAU – the paperwork is still being finalized, but we should have the official student chapter application approved by the National Executive Committee soon. Linda Lassiter will be the Student Chapter Liaison and Richard Brose has volunteered to be the Student Chapter Sponsor. Thank you both and thank you to all the officers and other volunteers for our section! I’m looking forward to working with you all.
Last year you will recall that our primary effort during the year was fending off legislation that would have eliminated registration for geologists and representation by a geologist on the State Board of Technical Registration (BOTR). While mostly successful in our effort, the legislature did create the category of “Trained Geologist”. The State Attorney General rendered an opinion (summarized by our lobbyist, below, and in the attached formal document from the AG’s office) regarding whether Trained Geologists can be regulated by the AZ BOTR. The conclusion is that Trained Geologists are generally exempt from regulation by the BOTR except in certain circumstances mainly related to whether they meet the requirements of a Trained Geologist as specified in HB 2613. Keep in mind that this does not change the requirements in statute that mandate that a Registered Geologist prepare certain documents such as Aquifer Protection Permits, UST permits, etc. Trained Geologists cannot prepare such documents.
I wrote an article that was included in the latest TPG regarding deregulation of geologists and deregulation in general. If you have any thoughts, I would appreciate it if you would forward them to me. The National Executive Committee is preparing to discuss/debate this issue and I expect it to be a key item to be addressed both this year and during my stint as National President in 2018. It is a very important issue and is being followed closely by many other professions especially the engineering community.
This year, we will not be hosting the National Executive Committee meeting in February as part of the Gem and Mineral Show as we have for the past several years. With new leadership provided by Executive Director Aaron Johnson, the ExCom has decided to have their first meeting in Orlando, FL later this month. The AZ Section officers and volunteers are working on putting together an agenda for 2017 and we hope to have that out to you in the next few weeks. We hope to have 2 formal meetings and 2 field trips during the year, so please take note of the dates when we get those out to you so you can get them into your calendars.
Again, thank you for your support and I truly look forward to an exciting year for our Section!
AIPG 2017 President-Elect
Arizona Section Field Trips
AIPG Arizona Section Spring 2014 Field Trip - pdf file
Metamorphic Core Complex along Catalina Highway
Leader: Arizona Geological Survey senior geologist Jon Spencer
Date: Saturday, April 12, 2014
Time: Meet at 10 am. Field trip will last 4-5 hours.
Meeting place: NE corner of Catalina Highway and Tanque Verde Road, Tucson. Park between McDonald’s and Le Buzz Cafe
What to bring: Lunch (can be purchased at Le Buzz Café or at Safeway, both in the shopping plaza meeting point), sunscreen, hat, hiking boots or sturdy walking shoes.
Provided by AIPG: Water and drinks
Dr. Jon Spencer of the Arizona Geological Survey will lead us up the Catalina Highway to explore the core complex that sits in Tucson’s backyard. We plan to have four stops:
?h Babad Do’ag overlook
?h Molino Canyon overlook
?h Gordon Hirabayashi campground (Prison Camp)
?h Geology overlook
There will be two stops with walks up to 1 mile in length and 100-200 feet elevation gains. All of the stops are at parking lots, so the folks who don’t care to make the walk have the opportunity to wait in the parking lot. We will have a lunch break at the Gordon Hirabayashi campground, where there are restrooms and picnic benches.
Field trip participants should bring their own snacks/lunch. We will be meeting at a shopping plaza that includes a grocery store and a café. We will be carpooling from the shopping plaza, since parking at the various stops will be limited.
There is no charge for the field trip, but please RSVP to James Adu (AIPG secretary) at (520) 405-3656 or firstname.lastname@example.org by April 9, so we can have estimate for parking spaces and handouts.
References: OFR-06-01-A Geologist's Guide to the Core Complex Geology Along the Catalina Highway, Tucson Area, Arizona, v. 1.1, by J.E. Spencer, 2006, 38 p. This can be downloaded without charge from the AZGS website (http://repository.azgs.az.gov/sites/default/files/dlio/files/nid360/ofr_06-01catalinafieldguide-colorprint.pdf). Please download a copy should you want to have it as a reference during the field trip. Jon will bring a small handout for that day.
A natural history of the Santa Catalina Mountains, Arizona, with a introduction to the Madrean sky Islands, Richard c. Brusca and Wendy Moore, Arizona-Sonora Desert Museum Press, 232 p.
The Arizona Section hosted the Fall 2013 field trip in northern Arizona on Saturday, October 5th. Section member Paul Lindberg (CPG-06344) prepared the 9-page color guidebook and road log, and led 21 participants on the field trip. The trip circumnavigated the northern portion of what is probably one of the youngest Basin and Range grabens to cut the Mogollon Rim. The Oak Creek - Mormon Lake Graben is a Pliocene-age (2 to 3Ma) structure identified by Paul during his many years of exploring and geologic mapping of the area south of Flagstaff and east of Sedona.
The field trip made a counter-clockwise tour around the northern end of the graben to study faults, rock exposures, fault outcrops, and other physical features related to rift valley genesis. We first visited a fault scarp within the graben that has been breached by an active stream channel that drains the Munds Park area. The next stop was a viewpoint on Interstate 17 that afforded a view to the west of Jacks Canyon fault that is the southward continuation of the Oak Creek fault - the west graben boundary. Traveling south and then east, we stopped to look at Stoneman Lake, a nearly mile-wide, roughly circular depression in the graben. The origin of the depression is uncertain; it may be a small graben within the graben, or an area of basalt collapse into a lava tube.
The trip continued to Mormon Lake, where another viewpoint afforded a panoramic view of the east side of the Mormon Lake depression, which forms the eastern boundary of the graben. Paul discussed the drainage changes that resulted from the crustal stretching of this part of the continent. The next stop was at a spectacular hands-on fault scarp where down-dropped Miocene basalt lava on the west side of the fault is in contact with Permian Kaibab Limestone on the east side of the fault (Photograph #1).
Photograph #1: Fault scarp along east boundary of Oak Creek – Mormon Lake graben
The tour then passed through the southern side of Flagstaff, which lies within the shallow northern part of the graben. Then we headed south into Oak Creek Canyon to observe two ages of fault movement along the Oak Creek fault zone. One phase is Laramide age (~70 Ma) compression where high-angle reverse faulting raised the east side of Oak Creek Canyon. Evidence for this phase included fault drag on the west side of the fault zone visible along Oak Creek (Photograph #2). The much younger (2 to 3 Ma) superimposed reactivation of the modern normal phase of the Oak Creek fault dropped the east side back down. Evidence for this phase included younger basalt on the east side of the fault juxtaposed against older (Permian) sedimentary rocks, and bleaching of the normally red sandstones by fluids migrating along the fault zone.
Photograph #2: Fault drag is down-to-the west on opposite bank of north to south flowing Oak Creek. Fault is behind the photographer.
Then we drove up Airport Mesa in Sedona for an aerial view of the Sedona area (Photograph #3). Paul pointed out the difference in erosional character between the now-dry stream-cut valleys in the Sedona area, and the young V-shaped Oak Creek Canyon and other smaller canyons that drain off the graben. We left Airport Mesa traveling south on Highway 179 and made two additional stops to look at graben-related features. One unanswered question was the true origin of the “exotic gravels, Beavertail Gravels, and Rim Gravels” that are present in the study area. Previous workers suggested the gravels are different units that were deposited from north-to-south off the rim. Paul’s studies suggest the gravels are correlative as one unit with a common source, and were transported from south to north. The highlands source was eroded away prior to formation of the graben. Local outcrops are now observed stair-stepping down to the south as a result of formation of the graben.
Photograph #3: Sedona area viewed from Airport Mesa northward
At each field trip stop, we had a lively discussion on the geology of the area. Paul noted that additional work needs to be done in the area to firm up some of his interpretations, including a few more basalt age-dates to clarify the stratigraphic and structural relationships. Anyone need a thesis topic?
Thank you to Paul Lindberg for another great field trip.
- Arizona Section - Oak Creek - Mormon Lake Graben - October 2013
- Arizona Section “Golden Anniversary” Trip to Chihuahua, Mexico - April 2013
- AZ Fall Field Trip - 10/22/11
- AIPG Field Trip - May 2011
- AIPG Field Trip - October 2010
- AIPG Arizona Field Trip - May 22
- Arizona 2009 Field Tour to Sonora, Mexico
Arizona Section Officers
Doug Bartlett, CPG-08433
2018 Past President, AIPG Arizona Section
Keith Scoular, AS-0061
2018 Secretary, AIPG Arizona Section
Bill Greenslade, CPG-02505
2018 Treasurer, AIPG Arizona Section
Barb Murphy, CPG-06203
Advisor, Phoenix Area, AIPG Arizona Section
Hall Stewart, CPG-11463
Advisor, Tucson Area, AIPG Arizona Section