BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
PRODID:-//Virginia Tech//VTCalendar//EN
BEGIN:VEVENT
DTSTAMP:20260305T223000Z
UID:AAAOxXAAVAAEaH6AAi@thor.lawrence.edu
CATEGORIES:Other
DTSTART:20260305T223000Z
DTEND:20260306T000000Z
SUMMARY:Science Hall Colloquium
ORGANIZER;CN="Science":
 about:blank
DESCRIPTION:
 Juliana Olsen-Valdez (LU '18;  PhD, University 
 of Colorado-Boulder '25)\n
 From microbes to climate: using microbialite stable 
 isotopes to reconstruct ancient carbon cycling 
 dynamics\n
 Microbialites are powerful biogeochemical tools. 
 These organo-sedimentary rocks are widely considered 
 among the oldest traces of life on Earth. Their 
 ubiquity across the geologic record and presence 
 in diverse environments today also make them crucial 
 archives for reconstructing the co-evolution of 
 life and the climate throughout Earth history 
 and into the future. We looked at the stable carbon 
 isotopes of microbialites that formed in a small 
 lake basin in Nevada over 50 million years ago. 
 We were curious whether sampling distinct microbialite 
 fabric components could disentangle carbon isotope 
 signals related to photosynthesis versus global 
 carbon cycling during one of the warmest periods 
 in the Cenozoic era. Come by to see what we discovered!\n\n

LOCATION:Thomas Steitz Hall of Science 102 - Lecture Hall
END:VEVENT
END:VCALENDAR