Name _______________________________
Chapter 9 Investigation Worksheet, page 1
To complete this worksheet, see the instructions in the textbook (Chapter 9 Investigation).
Table 1. Descriptions of Features
Read the descriptions in the textbook for the features labeled on the figure below (Chapter 9
Investigation), and determine the order in which the features formed. At the end of the exercise,
enter the letters of each feature in Table 3. From observations in nearby areas, the fault (F) and
igneous feature (I) both occurred after units A, B, C, D, and E.
Table 2. Relative Ages of Rock Units and Sediment
The rock units and sediments include: A, B, C, D, E, G, I, L, R, and V. If two units are the same
age, draw a horizontal line joining them together in the list below. List only the rock units, not
other geologic features, such as the fault.
Oldest _____ _____ _____ _____ _____ _____ _____ ______ ______ _____ Youngest
Chapter 9 Investigation Worksheet; page 2
Table 3. Sequence of Events
Using all the information, number the events in order from oldest to youngest.
Order (1 for oldest
to 12 for youngest)
Event
____
Deposition of conglomerate (A)
____
Deposition of greenish shale (B)
____
Deposition of tan sandstone (C)
____
Deposition of reddish sandstone (D)
____
Deposition of gray limestone (E)
____
Movement along fault (F)
____
Formation of granite (G)
____
Formation of igneous feature (I)
____
Eruption of lava flow (L) and formation of volcano (V) – list as LV
____
Erosion to form narrow canyon (N)
____
Deposition of older river gravels (R)
Table 4. Multiple-Choice Questions about the Chapter 9 Investigation
Question
Answers
Using the figure in the Investigation, what is the a) limestone in the far right (unit E)
oldest unit or feature of those listed here?
b) dike (unit I)
c) conglomerate (unit A)
d) lava flow (unit L)
e) granite (unit G)
Using the figure in the Investigation, what is the a) limestone in the far right (unit E)
youngest unit or feature of those listed here?
b) dike (unit I)
c) conglomerate (unit A)
d) lava flow (unit L)
e) granite (unit G)
Using the figure in the Investigation, what is the
oldest unit or feature of those listed here?
a) tan sandstone (C)
b) greenish shale (B)
c) conglomerate (A)
Using the figure in the Investigation, what is the
youngest unit or feature of those listed here?
a) tan sandstone (C)
b) gray limestone (E)
c) reddish sandstone (D)
Using the figure in the Investigation, what is the
youngest unit or feature of those listed here?
a) greenish shale (B)
b) granite (G)
c) volcano (V) and lava flow (L)
Using the figure in the Investigation, what is the
oldest unit or feature of those listed here?
a) the canyon (feature N)
b) lava flow (unit L)
c) dike (unit D)
d) fault (feature F)
How did the unconformity between the granite
(G) and overlying conglomerate (A) form?
a) Magma rose into the crust, stopping at the
base of the sandstone and baking the
sandstone.
b) The conglomerate was eroded into a gentle
landscape, and then the granite came in later.
c) The granite formed at depth and was
uplifted and eroded, and the conglomerate
was deposited on top.
d) Faulting or folding placed the conglomerate
over the top of the granite.