I can’t quite recall where I first heard of Summer Praetorious, but she is a respected professional in our area of inquiry. So I was intrigued today to see Summer post a pic of a collection of rather odd materials from a Younger Dryas marine core sample. Mighty cool. Cheers to Summer for sharing the mystery.

 

Can anyone help me with this mystery sample? It is unlike anything I have ever seen in a marine core. It has what look like selenite crystals (?) and orange clay aggregates (?). It is from the Younger Dryas boundary. #YoungerDryas pic.twitter.com/uZDnTSu1VC

— Summer Praetorius (@SKPraetorius) November 26, 2019

summer praetorious younger dryas