http://www.marcdefant.com/wp-content/uploads/2023/07/cropped-Marc-Defant-220x300.jpg00Marc Defanthttp://www.marcdefant.com/wp-content/uploads/2023/07/cropped-Marc-Defant-220x300.jpgMarc Defant2026-08-19 19:49:232026-08-19 19:50:49A 12.8 ka mircrospherule and nanoparticle marker horizon in stratified Paleoamerican deposits at Smith Mountain Lake (44PY152), USA