GSW traditionally hosts a dinner for the current president prior to their presidential address. This year we also took the immediate past president to dinner because last year’s dinner was cancelled as a consequence of Covid-19. The number in parenthesis is the year they served GSW as president. L. to R. on the front row we have Linda Rowan (2011), Rosalind Helz (1994), Ester Sztein (2020), Liz Cottrell (2021), Karen Prestegaard (2018), Mary Horan (spouse), Jane Hammarstrom (2000), and Lynn Shirey (spouse). L. to R. on the back row we have Callan Bentley (2017), Bill Burton (2009), Richard Walker (2006), George Helz (1996), Tim Mock (2014), David Applegate (2003), Brooks Hanson (2005), Michael Purucker (2019), and Steve Shirey (1999).
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Here in the Tonga Trench, the 1st sighting of the deepest-living Bigfin Squid, genus Magnapinna. Note the distinctive elbow-like bend in the extremely long arms & tentacles. #HadalZone #ExtremeHabitat
Face-to-face with a Bigfin Reef Squid 🦑✨ Just enough time to snap some macro shots before it swam off. Underwater magic captured by John Roney! 🎥: roneydives IG
Gasp! Now that's what we call a xenolith!
American Mineralogist:
Tetrahedral aluminum in tourmaline from a spinel-pargasite-metamorphosed mafic-ultramafic rock
By Oleg S. Vereshchagin, et al.
https://doi.org/10.2138/am-2023-9170
The formation of these tourmalines requires: (1) desilication of primary rocks and (2) high T and P.A ShakeMap shows the ground shaking caused by an earthquake. This map from the @cageosurvey compiles all the ShakeMaps generated from 1981 - 2023 for earthquakes of magnitude 4+! https://www.conservation.ca.gov/cgs/documents/publications/map-sheets/MS_067-Cumulative-ShakeMap-2024-a11y.pdf