(solution) Graded Assignment SCI112A: Earth Science | Unit 4 | Lessons 7 and

(solution) Graded Assignment SCI112A: Earth Science | Unit 4 | Lessons 7 and

Graded Assignment

Lab Report: Interpreting Geologic History

Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit.

In this laboratory experiment, you will write a narrative history of a rock section found in the Grand Canyon. You will describe and explain the events starting with the Vishnu Schist forming and ending with the unconformity above the Redwall Limestone in the Mississippian. Your description should include environmental changes.

Example: 

  • Sea level lowered, and the Esplanade Sandstone was deposited in a beach environment.
  • Erosion, and the sea level rose.
  • Hermit Shale deposited in a deeper sea.
  • Sea level drops, returning the area to a beach environment where the Coconino Sandstone was deposited.

Interpret the bottom half of the cross section below. Start with the Vishnu Schist and end with the Redwall Limestone.

Scoring:

(8 points)

Score

Correct order: 

(8 points)

Score

Proper environmental changes:

(4 points)

Score

Attention to detail and completeness:

Answer:

(5 points)

Score

There is one of each type of unconformity in this diagram. Name at least one of each of them by indicating the layers that they are between.

Nonconformity:

Answer:

Angular unconformity:

Answer:

Disconformity:

Answer:

Your Score

___ of 25

Graded Assignment SCI112A: Earth Science | Unit 4 | Lessons 7 and 8: Laboratory: Interpreting Geologic History Name: Date: Graded Assignment
Lab Report: Interpreting Geologic History
Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for
full credit.
In this laboratory experiment, you will write a narrative history of a rock section found in the Grand Canyon. You
will describe and explain the events starting with the Vishnu Schist forming and ending with the unconformity
above the Redwall Limestone in the Mississippian. Your description should include environmental changes.
Example: Sea level lowered, and the Esplanade Sandstone was deposited in a beach environment. Erosion, and the sea level rose. Hermit Shale deposited in a deeper sea. Sea level drops, returning the area to a beach environment where the Coconino Sandstone was
deposited. 1. Interpret the bottom half of the cross section below. Start with the Vishnu Schist and end with the Redwall Limestone. Scoring:
(8 points) Score Correct order: (8 points) Score Proper environmental changes: (4 points) Score © 2006 K12 Inc. All rights reserved.
Copying or distributing without K12?s written consent is prohibited. Page 1 of 4 Graded Assignment SCI112A: Earth Science | Unit 4 | Lessons 7 and 8: Laboratory: Interpreting Geologic History Attention to detail and completeness: Answer: (5 points) Score 2. There is one of each type of unconformity in this diagram. Name at least one of each of them by
indicating the layers that they are between. Nonconformity:
Answer: Angular unconformity:
Answer: Disconformity:
Answer: Your Score ___ of 25 © 2006 K12 Inc. All rights reserved.
Copying or distributing without K12?s written consent is prohibited. Page 2 of 4 Graded Assignment Symbol SCI112A: Earth Science | Unit 4 | Lessons 7 and 8: Laboratory: Interpreting Geologic History Name Environment Sandstone Beach or nearshore environment Limestone Forms in warm shallow seas Shale Igneous Rock
(Granite) Metamorphic Rock
(Schist) Igneous intrusion Deep sea Formed when rocks melt and then recrystalize Formed when rocks are severely deformed without melting; in
this cross section, the Vishnu Schist represents the original
surface in the area Magma melting and rising from deeper levels Hint: How can you tell the difference between an intrusion and rocks melting in place? Rocks melting in place
usually appear as a large mass, whereas intrusions seem to have risen up from a source. © 2006 K12 Inc. All rights reserved.
Copying or distributing without K12?s written consent is prohibited. Page 3 of 4 Graded Assignment SCI112A: Earth Science | Unit 4 | Lessons 7 and 8: Laboratory: Interpreting Geologic History © 2006 K12 Inc. All rights reserved.
Copying or distributing without K12?s written consent is prohibited. Page 4 of 4