Question 1
 
Read the descriptions of the features labeled on this figure in the Chapter 9 Investigation in your textbook and determine the order in which the rocks and geologic features formed (e.g., make a list of the letters from oldest to youngest). What is the oldest rock unit in the area?
Answer

tan sandstone (A)

greenish shale (B)

dike (D)

granite (G)

gray limestone (K)
1 points
Question 2
 
Indicate the relative age of these three rock units, with 1 being the oldest of the three and 3 being the youngest.
Answer
tan sandstone (A)
greenish shale (B)
coarse sandstone (C)
1 points
Question 3
 
Indicate the relative age of these three rock units, with 1 being the oldest of the three and 3 being the youngest.
Answer
tan sandstone (A)
gray limestone (K)
reddish sandstone (S)
1 points
Question 4
 
Indicate the relative age of these three rock units, with 1 being the oldest of the three and 3 being the youngest.
Answer
greenish shale (B)
granite (G)
volcano (V) and lava flow (L)
1 points
Question 5
 
Indicate the relative age of these four geologic events, with 1 being the oldest of the four, and 4 being the youngest.
Answer
formation of the dike (D)
movement along the fault (F)
deposition of older river gravels (R)
eruptions forming the volcano (V) and lava flow (L)
1 points
Question 6
 
How did the unconformity between the granite (G) and overlying coarse sandstone (C) form?
Answer

Magma rose into the crust, stopping at the base of the sandstone and baking the sandstone.

The sandstone was eroded into a gentle landscape, and then the granite came in later.

Faulting or folding placed the sandstone over the top of the granite.

The granite formed at depth and was uplifted and eroded, and the sandstone was deposited on top.
1 points
Question 7
 
The Chapter 9 Investigation in the textbook has a table of fossils and their geologic period. Based on this table, which rock…