Transcript Day 43

Day 43
What processes can be observed in a
stream table?
erosion, transport, and deposition
What causes weathering?
Weathering can be caused by physical
processes like ice wedging and thermal
breakage. It can also be caused by
chemical processes like when acid rain
dissolves minerals.
Daily Warm-Up Exercises
1
Captions
Exercise 3.2
2
Chuar Butte
3
Identify Grand Canyon Layers
(Part 2, steps 1-6)
Investigation 3
Grand Canyon Rocks
4
Important Tools
Why would a geologist consider a bottle
of acid and a hand lens two of his or her
most important tools in the field?
The acid is used to detect calcite in a rock.
The hand lens provides a close look at the
particles in a rock. Both help geologists
figure out what kind of rock it is.
5
Identify Rocks
 Turn to page 11 in your lab notebook and
to page 9 in your resources book.
 Which rock is at river level in Nankoweap
Canyon?
rock 4
 What kind of rock is rock 4?
limestone
6
Identify Rocks
 Which rock is directly above rock 4 in
Nankoweap Canyon?
rock 5
 What kind of rock is rock 5?
limestone
7
Identify Rocks
 Record the rock
number in the ID
column.
 Record the kind of
rock in the bottom
half of the name
column.
 The layer name
will go in the top
half.
5
Limestone
4 (layer name)
Limestone
8
Check Your Work
9
8
7
6
5
4
Limestone
Sandstone
Limestone
Shale
Limestone
Sandstone
Sandstone
Limestone
Shale
Limestone
Sandstone
10
9
8
7
6
9
Layer Names
Geologists who have studied the Grand
Canyon have given these layers official
names. Many are Native American in origin.
The names are displayed on the next slide.
Record them in the top half of the name
column.
10
Layer Names
9 Toroweap
Limestone
7 Hermit
Shale
Kaibab
Limestone
Toroweap
Limestone
6 Supai
Sandstone
Coconino
Sandstone
8
5 Redwall
Limestone
Hermit
Shale
7
4 Muav
Limestone
Supai
Sandstone
6
8 Coconino
Sandstone
10
9
11