The International Obsidian Conference 2021 occurred April 30 - May 2 in a virtual format.
http://arf.berkeley.edu/projects/ioc2021
The presentations and discussion are shared here with timestamps linking to each talk.
IOC 2021 DAY 1 RECORDED TALKS:
Keynote: Thirty-Five + years of Struggle, or how things "oughta" be in Obsidian Provenance Research, Shackley 02:13
The Charaña Obsidian Source and Its Role in the Prehispanic Exchange Networks of the Titicaca Basin. Burger et al. 59:40
Obsidian Exchange among Hunter-Gatherers in Northwestern Patagonia. F. Franchetti, et al. 1:23:22
Prehistoric Use of an Obsidian-Rich Ignimbrite Deposit, Northwestern Patagonia. Raven Garvey et al. 1:39:45
A 12,000-Year Sequence of Human Use of the Alca Obsidian Source, Peru. Rademaker, et al. 2:05:10
pXRF Obsidian Analysis of Two sites in the Southern Basin of Mexico. Acosta-Ochoa, et al. 3:23:41
Marketplaces and Market Exchange of Obsidian During the 8th – 10th Centuries at El Zotz, Guatemala. Kwoka, et al. 3:43:06
Obsidian Exchange Spheres in Late Postclassic Mesoamerica. Marino, et al. 4:12:46
Networks of Procurement and Provisioning. McCormick et al. 4:33:02
New XRF Provenance Research on The Obsidian Jewelry from The Great Temple of Tenochtitlan, Mexico. Melgar-Tísco, et al. 4:53:55
Mesoamerican Obsidian in the American Southwest. Dolan 5:14:07
Finding Obsidian Sources in Yellowstone National Park: Further Work. Vianello & Tykot 5:37:54