Stratigraphic Cross Section—Interpreting the Geology Educational

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http://www.iris.edu/hq/inclass/search... • This animation shows a hypothetical cross section of the Earth, then takes you back to the beginning to walk you through the steps that would create this scenario. • Why study stratigraphy? And how does this relate to earthquakes? • The earthquake potential of an area can be determined by studying the relationships between rock strata, both locally and regionally. Faults and folds record a probable earthquake history, so by studying the age of the rocks we can gain an understanding about future earthquakes (applying the past is a key to the future ). This is done by doing field work, studying drill-hole samples, and interpreting seismic reflection data. • Animation by Jenda Johnson, Earth Sciences Animated • Reviewed by Randall Milstein, Oregon State University

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