SAHND and SHEL Archaeology and Ecology Labs
@sahndshel.bsky.social
The combined research labs of Drs. Jacob and Isabelle Holland-Lulewicz at Penn State Anthropology. The Spatial Archaeology and Historical Network Dynamics Lab (SAHND) and the Laboratory for Socioecological Histories of Estuarine Landscapes (SHEL)
Usually this is done with 15-20 oxygen isotope samples/shell. Taking weeks of work. For Matt’s sample of oysters, this would usually cost $45k. Instead, it costs a trip to @leizarchaeology.bsky.social + a single oxygen sample/shell (to determine the salinity of the water the oyster grew) 3/3
November 24, 2025 at 3:52 PM
Usually this is done with 15-20 oxygen isotope samples/shell. Taking weeks of work. For Matt’s sample of oysters, this would usually cost $45k. Instead, it costs a trip to @leizarchaeology.bsky.social + a single oxygen sample/shell (to determine the salinity of the water the oyster grew) 3/3
Using thousands of laser blasts, we measure how the ratio of Mg to Ca changes. This ratio tracks with temperature. So, by looking at what this ratio was when the oyster died, we can determine what seasons these oysters were collected by enslaved and Free Black communities on the Georgia coast 2/3
November 24, 2025 at 3:52 PM
Using thousands of laser blasts, we measure how the ratio of Mg to Ca changes. This ratio tracks with temperature. So, by looking at what this ratio was when the oyster died, we can determine what seasons these oysters were collected by enslaved and Free Black communities on the Georgia coast 2/3