A sample of volcanic ash is used to demonstrate leaf fossils in lapilli tuff. Learn how the distinctive texture of the volcanic rock and the included fossils can be used to help correlate it with other volcanic rocks in the region.
Students take an informational tour to gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.
Reviews how rock units in different locations can be correlated to understand the geology of a region.
A list of student-submitted discussion questions for Correlation Using Relative Ages.
To emphasize students’ understanding of key words and practice applying the definitions of the vocabulary words to examples and drawings using the Frayer Model.
To show how details are organized into categories that in turn are related to main ideas using a Spider Map.
Connect your daily life experiences with specific points in a reading using a Double Entry Diary.
The John Day Fossil Beds in eastern Oregon have a weath of fossils that span a long period of time. The relative ages are well constrained becauase a volcanic ash has been radiometrically dated.
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