NEXT MEETING: Wednesday, April 16, 2025, 6:00 PM at 2045 Memory Lane in Silver City, New Mexico. The GCAS's next monthly IN-PERSON ONLY meeting features speaker geoarchaeologist Dave Rachal PhD of Tierra Vieja Consulting in Las Cruces NM. Doors open at 6:00 PM with light refreshments on offer. Socializing and a brief-to-nonexistent business meeting will immediately precede Dave's presentation of: How Did The Seeds Get There? Ruppia cirrhosa Ecology, Depositional Context and Accurate Radiocarbon Dating at White Sands: "The stratigraphic and geomorphic contexts, and ultimately the chronometric determinations, at White Sands Locality-2 (WHSA-2) are topics of controversy that stem from conflicting interpretations of the processes that deposited the Ruppia cirrhosa (Ruppia) seeds within the paleo-Lake Otero footprint site....[O]ur interpretation depicts the shoreline as an unstable, dynamic lake margin to which Ruppia seeds...were transported from deep-water, offshore growth beds during storm events and deposited on the lake shore in seed balls. These unusual aggregates, known to mix seeds of wide-ranging ages, were gradually broken apart by several cycles of wave action and erosion and redeposited in layers....[W]e will delve into both the ecology and the depositional context of Ruppia and discuss why the Ruppia seeds at paleo-Lake Otero are problematic materials for radiocarbon dating." Check out Dave's and Tierra Vieja Consulting's YouTube videos (links are on our Events page) and bring your questions for him!

NEXT FIELD TRIP: Sunday, April 6, through Tuesday, April 8, 2025: Lyman Lake State Park/Springerville/Casa Malpais AZ. Sunday-Monday, explore Lyman Lake's petroglyphs & archaeological site on your own or with a group. On Tuesday 4/8, we have guided tour of Casa Malpais archaeological site. Reservations are required for ONLY the guided tour to the Casa Malpais site but we must give them a final tally no later than March 23, 2025, so please let trip co-leader Torie Grass ([email protected]) or Eduardo Argüello ([email protected]) know to put you on the list. More details available in newsletter and on Events page of this website, and in the blog posts below. As usual for any GCAS field trip, wear sturdy shoes and pack sun protection & water. See you there!

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News from the Jornada Research Institute

Our friends to the east at the Jornada Research Institute have sent us an update on their archaeological activities and invite interested folks to join in the fun. JRI president Dave Greenwald reports that their work continues at Creekside Village including in the great kiva area. During March into April, volunteers will help complete one 2 m by 5 m area within the great kiva. Dave describes JRI’s further investigations:

We plan to continue working at Creekside Village each Saturday and Sunday (circumstances permitting) until April 28th after which we will relocate to the Cornelius Locus in Ruidoso. To join us at Creekside Village, please contact me so I can coordinate fieldwork dates, times, and meeting places with you.

We shifted from Feature 11 (the pithouse) to excavating in the great kiva in order to prep the kiva for an upcoming tour to several members of the SW Region (3) US Forest Service. We are completing a section of the kiva in the NE quadrant where we have uncovered some well-preserved prepared clay floor covered in fine gray ash and what appears to be a posthole, perhaps the 4th main support posthole of the patterned layout that forms a square/rectangle and helped support the roof in conjunction with the surrounding adobe wall of the great kiva.

For this tour (and future tours) we are preparing a non-permanent interpretive poster that will be displayed in-line with the central hearth and entryway that will show the eastern horizon and the various celestial points/associated landscape markers visible from the hearth through the entryway as well as other celestial points with their respective landscape markers that include the equinox, summer solstice and NE lunar extreme positions. The poster will demonstrate what could be observed from the great kiva during the annual solar year, lunar 18.6-year nodal cycle, and perhaps Venus’ 8-year Synodic cycle. The winter solstice event, SE lunar maximum event, SE Lunar minimum event, and the SE-most position of Venus are all visible within the framework of the kiva’s entryway. Using the poster as reference we will discuss on future tours how the Jornada Mogollon monitored the horizon, keeping time in similar fashion to how the Hopi and Zuni monitor their eastern horizon even today and perhaps how other Pueblo groups also monitored specific solar events within designated structures.

We will be offering tours throughout March and April to small groups and civic organizations who wish to visit the first great kiva observatory identified in the Tularosa Basin. To arrange for a tour, contact meand I will be happy to provide this experience for you.

We would ask any participating GCAS members to let us know about your experiences so that we can showcase them in our newsletter and on this here website. Join in a rare investigative opportunity!

/s/ webmaster

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