We just got back from visiting our friend and collaborator Professor Beth Herndon at Kent State where we were able to use their Environmental SEM-EDS system to image and analyze sediment core thin sections from Fayetteville Green Lake, N.Y., as well as some hot spring silica sinter deposits.
The image at upper left is from one of those sediment thin sections, and shows calcite crystals (medium grey), diatom bits (darker grey), and some bright pyrite framboids (one of which looked to me like the Millenium Falcon!)
The image at lower left is a close up of a hot spring photosynthetic mat with the filaments encrusted with silica. So excited to get to image these samples!
Up next is traveling to Argonne National Lab to use the APS (Advanced Proton Source) to analyze the sediment core thin sections with the Herndon Lab, followed immediately by AGU, where I will be Co-Chairing a session on Tuesday: (Bio-Isotopic) Message in a (Rock Record) Bottle: Who wrote it, how did it get there, and what does it tell us? Poster session is in the morning (B21A) and the oral session is from 4 to 6 pm (B24A). Please check it out...we have a great lineup!
I will be presenting a poster Wednesday afternoon (B33B-0656) on element sequestration by hot spring microbial communities and how that translates to silica sinter. (Hope you can stop by if you are there!)