Chapter 10: Deep Time: How Old is Old?
Animations
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(10.1) Geologic History
A cross-section through the earth reveals the variety of geologic features. View 1 of this animation identifies a variety of geologic features; View 2 animates the sequence of events that produced these features, and demonstrates how geologists apply established principles to deduce geologic history.
Created by: Stephen Marshak
(10.2) What a Geologist Sees: Stratigraphic Column
The succession of rocks in the Grand Canyon can be divided into formations based on notable changes in rock type and changes in fossil assemblages
(10.3) What a Geologist Sees: Unconformity
The photo shows the Siccar Point unconformity in Scotland, on the coast about 60 km east of Edinburgh; the sketch shows a geologist’s interpretation of the unconformity.
(10.4) Types of Unconformity
This animation shows the stages in the development of three main types of unconformity in cross-section, and explains how an incomplete succession of strata provides a record of Earth history. View 1 shows a disconformity, View 2 shows a nonconformity and View 3 shows an angular unconformity
Created by: Stephen Marshak
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