The last GSW meeting of the Spring featured three formal talks, two informal communications, and an obituary. A draft of the meeting minutes can be found here.
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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
