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Rock Report Exercise

Due Date: 4/1/2014 Name: Rianne Richter Class: 1121k Grade: /35

After you have finished Lab Exercises 4, 5, and 7, complete the following questions. You may have to refer to the exercises for assistance to locate specific answers.

1. Match the rock type with the correct statement describing its formation. (3 point).

❖ Found where the atmosphere or liquid water causes erosion and movement of rock pieces. Metamorphic Formation

❖ Found mostly near convergent tectonic plate boundaries where the P/T condition can be very high. Sedimentary Formation

❖ Found in places where the interior is so hot that rock melts and tehn cools again to form new rock. Igneous Formation

2. List the texture and mineral composition of each of the following rocks. (5 points).

Granite: Schistosity; Quartz, K-feldspars, biotite. Marble: Non-foliated; Calcite. Sandstone: Clastic; Quartz, feldspare. Gneiss: Compositional Banding; Diorite or granite. Shale: Layered, fine-grained; Quartz.

3. Where would you expect to find the coarser textured igneous rocks, in a laccolith or in a lava flow? Why? (2 points)

A laccolith, because rocks that are found in a lava flow cool too fast to form course faces.

4. Which of the following igneous rocks would be more easily chemically weathered, Diorite or Gabbro and why? (3 points)

Gabbro, because its composition of minerals are unstable at low-pressure temperature conditions.

5. What are two possible environments for the origin of the sedimentary rocks sandstone and limestone? (1 points)

Beaches and deserts.. anywhere where sand-sized...

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