Chronometric Dating Techniques Are Based On
{"Image DocumentName": "Absolute Dating Techniques", "Image ImageDescription": "Index Fossils: fossils of a species that only existed during a limited time. The fossil is the same age as the layer of rock it is in. If there is a fossil in a rock layer, and we know what time period the animal lived, we can conclude that the rock was formed during that period. After introducing index fossils, ask students which fossils could be index fossils in this diagram (2, 5, 3). Say, well if we know that fossil 2 is 50 million years old, what do we know about the layer it is in? If we know that fossil 5 is 25 million years old, what do we know about the age of the layer it is in?", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}