Dating geologic time
Students will develop a better understanding of how geologic time is measured, learn about the events of the past, and explore interactive geologic time case studies at some of America's greatest National Parks.Geologic Time Views Module The divisions of the geologic time scale are organized stratigraphically, with the oldest at the bottom and youngest at the top.
One of the great challenges facing geologists is to find answers to such questions.Free 5-day trial Learn how scientists determine the ages of rocks and fossils.We'll explore both relative and numerical dating on our quest to understand the process of geological dating.Fossils, buried under layers of sedimentary rock, are vestiges of the past.They are usually the hard parts (bones, shells, etc.) of animals and plants that have been preserved.
The geologic time scale began to take shape in the 1700s.