Potassium argon dating archaeology
{"Image DocumentName": "Potassium-argon (40K/40Ar) and argon-argon dating (40Ar/39Ar)", "Image ImageDescription": "Ideal for dating early hominid fossils in East Africa. They occur in an area that was volcanically active when the fossils were deposited between one and five million years ago.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}