Part A
The Triassic & Jurassic Periods
The three periods of the Mesozoic Era stretch across almost 200 million years of geologic history (see Figure 12-2). The Triassic and Jurassic are the first two Periods of the Mesozoic Era, which is rich and filled with significant geologic and biologic events. Rocks and fossils of this age are exposed across North America, coast to coast.
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Figure 12-2. The official 2024/12 ICS geologic time scale (left) and its Triassic-Jurassic section (right). Click on each image to see larger versions. See HERE for a PDF of the 2024/12 version. |
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Triassic & Jurassic Geologic Time
Let's use a geologic time scale to get familiar with the Triassic and Jurassic Periods. A simplified geologic time scale constructed from the 2020/03 ICS time scale is shown in Figure 12-3. It is not drawn to scale as its focus is including all of the periods of the Phanerozoic Eon and all of the epochs of the Cenozoic Era.
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Figure 12-3. A simplified geologic time chart compiled from the 2024/12 ICS version. |
* IMPORTANT *
Using the PDF link above, print a hard-copy version of this chart for use in this lab.
Refer to the simplified geologic time chart in Figure 12-3 to answer Quiz Me! questions A01 through A04.
