Name:
Class day and time:
Web Extras for Chapter 4: Sedimentary Rocks
5.
Sedimentary Geology of the Grand Canyon. Go to Grand Canyon Explorer
(http://www.bobspixels.com/kaibab.org/geology/gc_layer.htm) to see descriptions of the rocks exposed in the
Grand Canyon.
a.
What kinds of Paleozoic sedimentary rocks occur in the Grand Canyon (types of rocks, not names of
formations)?
b.
At the bottom of the page is a drawing summarizing the rocks seen in the Grand Canyon. Use the
maximum thickness given for Paleozoic formations to calculate the relative proportions of the following
rock types: carbonates (limestone plus dolostone), shale, and sandstone.
c.
Globally, sedimentary sequences average 15% carbonates, 65% shales, and 20% sandstones. When you
gaze out across the Grand Canyon (see links below), do you see a set of rocks comparable in composition
to the world average?
d.
Based on their descriptions and Table 4.2 in the lab manual, what are the depositional environments of the
following:
1. Kaibab Limestone
2. Coconino Sandstone
3. Hermit Shale
4. Supai Formation
Web Extras for the Laboratory Manual for Physical Geology by Jones and Jones (McGraw-Hill).
5. Temple Butte Limestone
If you want to see pictures of the canyon, try www.bobspixels.com/kaibab.org and click on
Photographs. Other links also show many of the great things you can see and do in and around the
Grand Canyon.
Web Extras for the Laboratory Manual for Physical Geology by Jones and Jones (McGraw-Hill).