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2026 AAC Fall Conference 

Friday, October 2, 2026


8:30 am. to 5 p.m., with registration pick-up starting at 8 a.m. 

There is also an option to pick up registration the evening before.

Nogales, Arizona

Venue: Santa Cruz County Provisional Community College District

2021 N. Grand Avenue, Nogales, Arizona 85621


Theme: “Frontiers and Exchange” / “Fronteras y Intercambio”


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Registration now open!



Register to attend the conference here.



Conference schedule coming soon.


Thank you for your support of the AAC!


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AAC Conference Policy: Out of an abundance of respect for the ancient inhabitants of Arizona and their descendants, the Arizona Archaeological Council (AAC) does not allow the inclusion of photographs depicting human remains, human burials, or funerary objects in AAC conference presentations. Illustrations may be used as necessary to convey important visual information. Presenters also shall review the Arizona State Museum guidance on Respectful Terminology Recommended for Discussion of Human Remains prior to any presentation discussing human remains. If a presenter has questions or concerns about illustrations proposed for inclusion in their presentation, they should feel free to contact the AAC for additional guidance. 




Conference Program and Schedule


Preliminary Program


Thursday, October 1st 

5:00 to 7:00pm Welcome and Registration Pick-Up (@ Conference Venue) 

Friday, October 2nd 

8:00 to 8:30am Registration Pick-Up 

Time 

Presenter 

Presentation

8:30am 

TBD 

Welcome from Pima Community College

8:35am 

Hunter M. Claypatch 

Welcome from ACC President



Session #1: Binational Collaboration & Institutional Updates 

Moderator: Hunter M. Claypatch 

Time 

Presenter 

Presentation

8:35am 

Elisa Villalpando-Canchola 

Sonora y Arizona: Arqueología sin fronteras

9:00am 

Patricia A. Gilman & Eric Kaldahl 

Archaeology in the Borderlands

9:15am 

Allen Dart 

About Old Pueblo Archaeology Center

9:30am 

Alex B. Lim 

Overview of Historic Preservation Research and Education through Partnership and Tumacácori National Historical Park

9:45am 

Liliana Toledo Guzmán 

El catálogo de la Sociedad Histórica de Pimería Alta:  De los registros históricos a los objectos arqueológicos

10:00am 

Questions & Comments



Session #2: Historic & Contemporary Archaeology  

Moderator: TBD

Time 

Presenter 

Presentation

10:15am 

Deni J. Seymour 

Gifts vs. Domestic Debris in Southwestern and  Southeastern Exploration Era Site

10:30am 

Annie Immordino 

When Dates Become Claims in the Dinétah

10:45am 

Zithlaly Vega 

Exploring Social Segregation and Social Identity in Historic  Tempe through Double Butte Cemetery

11:00am 

Emery F. Manuel 

Roadside Memorials of Southern Arizona

11:15am 

Juanita Sandoval & Mary Carol Combs 

Archaeology of the Contemporary: Memory and Cultural  Objecthood of Migrant Artifacts at the U.S.-Mexico  Border Wall

11:30am 

Questions & Comments



11:45am to 12:30pm Catered Lunch at venue from La Castellana 

12:30pm to 1:10pm Poster Viewing & Disussion  

(Note: posters will be up the whole conference, but this will be time to interact w/ presenters) 

Poster Presentations 

Presenter 

Presentation

Cinthya Isabel Vidal, et al. 

Tracing Ancient Interactions at Northwest Mexico/American  Southwest: Analysis of Archaeological Evidence from the La  Ferrería Site, Durango, Mexico, ca. 550–1350 C.E.

Hunter M. Claypatch 

Neighbors Along the Creek: The Archaeology of Patagonia,  Arizona and Its Relationship to the Wider Arizona-Sonora  Borderlands

Christine H Virden-Lange 

Shell Ornaments from Early Agricultural Period Sites in the  Tucson Basin

Thatcher Seltzer-Rogers & Hunter M. Claypatch 

What IS Santa Cruz Polychrome? Recent Perspectives and  Developments Regarding a Poorly Known Polychrome from the  International Four Corners

Additional posters will be announced shortly!



Session #3: The Arizona-Sonora Borderlands 

Moderator: Zithlaly Vega 

Time 

Presenter 

Presentation

1:15pm 

Guadalupe Sánchez & Matthew Pailes 

The Fronteras Valley, Sonora: 3,000 Years of Cultural History

1:30pm 

Noah A. Place & James T. Watson 

Bioarchaeological Evidence for Treponemal Transmission  across an Ancient Frontier

1:45pm 

Héctor Javier Matzumiya Ballesteros 

El rol de La Proveedora en el acceso al Golfo de California:  distribución de grupos petrográficos en cerámica Trincheras  de la costa y del interior del Desierto de Sonora

2:00pm 

Thomas Edward Jones, et al. 

The Implications of Early Urn Cremations at Sites in the  Upper Santa Cruz Area

2:15pm 

Cristina García-Moreno, et al. 

Investigaciones arqueológicas en La Ciénega, Sonora

2:30pm 

J. Homer Thiel 

Archaeological Discoveries at Tumacacori, Calabazas, and  Guevavi Mission

2:45pm 

Júpiter Martínez Ramírez & Tomás Peres  Reyes

From Documentary Sources to the Archaeological Data: The  Case of the Cocóspera Mission

3:00pm 

Questions & Comments



Session #4: Beyond the Borderlands 

Moderator: TBD 

Time 

Presenter 

Presentation

3:15pm 

Joseph A. Bryce & Joseph S. Cary 

The Two Dog, Owens Colvin, and Black Sites: Reevaluating  the Prehistoric Chronology for the San Carlos Stafford Area in  Southeast Arizona

3:30pm 

Michael P. Silver 

Hohokam Stone Palette Use, Evolution, and Social Function

3:45pm 

Luna Osterwise, et al. 

The Shell Assemblage of AZ U:9:319(ASM)

4:00pm 

William Dundas, et al. 

A Geochemical Analysis of the Obsidian Assemblage from AZ  U:9:319(ASM), Mesa, Arizona

4:15pm 

José R. Vivero-Miranda 

Community Transformations at the Northern Aztatlán Frontier: Differential Responses to the Aztatlán Tradition in  Northern Sinaloa

4:30pm 

Questions & Comments



4:45pm Closing Remarks 

5:30pm After Party: Patio of Tito's Pizza & Italian Eatery, 1855 N Grand Ave, Nogales, AZ 85621

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Lunch will be catered at the conference venue.


The conference after-party will be held at Tito's Pizza and Italian Eatery at 1855 N. Grand Ave., Nogales, AZ 85621.


Nearby Lodging


*Hotel Americana - call the hotel for a special conference rate with the group name "AAC Fall Conference"


Nearby Dining


Coming soon.



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