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.
|
|
|
|
Figure 12-2. The ICS chronostratigraphic chart is the official time scale used worldwide. The 2020/03 version (left) and its Triassic and Jurassic section (right). |
|
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.
|
|
|
Figure 12-3. A simplified geologic time chart compiled from the 2020/03 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.
