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: TBA - watch this space and your newsletters for details as they develop.

Previous month:
September 2020
Next month:
November 2020

October 2020

Happy Halloween to All

Bats 4The Bat - by Frank Jacobs

Bats are creepy! Bats are scary!

Bats do not seem sanitary.

Bats 3Bats in dismal caves keep cozy;

Bats remind us of Lugosi.

Bats have webby wings that fold up;

IMG_0106 - 3 sets of wingsBats from ceilings hang down rolled up.

Bats when flying undismayed are;

Bats are careful; bats use radar.

IMG_0129 - good profileBats at nighttime at their best are;

Bats by Batman unimpressed are!

 

/s/ webmaster [all photos by M.Smith]


Online Via Zoom: Our October 21, 2020 Featured Speaker, John Stocke

Stocke_johnPleiades Wednesday, October 21, 2020, 7:00 PM: GCAS general meeting via Zoom. Unencumbered by a business meeting, we will begin by welcoming our Featured Speaker, John Stocke, Colorado University-Boulder professor of Astrophysical & Planetary Sciences (1985-2017). Dr. Stocke will share the "Secrets of Andean Skies: the Mystery of the Pleiades". If you recall his fascinating talk in March 2019 about “Polynesian Navigation” you will definitely want to join us on Zoom starting at 6:45 to get the audience situated for the lecture to begin at 7:00 PM sharp. A Q&A session with John will follow his lecture. Check your email inbox for your Zoom invitation! As further background to the presentation:

Continue reading "Online Via Zoom: Our October 21, 2020 Featured Speaker, John Stocke" »


In Search of: GCAS Volunteers

Zoom picAs our membership already knows, the GCAS has resumed monthly meetings online via Zoom. We assembled a Zoom committee with the idea that up to 3 or 4 GCAS members could take turns acting as hosts for these Zoom meetings. Unfortunately some of our volunteer hosts quickly discovered that they do not have reliable enough equipment and/or connectivity to the internet to help out.

How about you?

Even if you have no experience hosting a Zoom meeting yourself, our Zoom committee has already done the work for you. With just one or two short practice sessions online with us, you can get familiar with how to use the 2 or 3 controls you need to start a meeting, introduce the featured speaker using our handy introduction form, and close down the meeting after the lecture and a Q&A session.

Please help the GCAS keep these monthly meetings going. You (yes, you) can contact the right people right away by emailing us at either [email protected], or reaching out to President Kyle Meredith at [email protected], telephone 575-538-5706.

/s/ webmaster