Quiz #16

6 October 2011

S.I. Session 16 Quiz

This quiz covers material from the lecture on Wednesday, October 5^th.

Part a) Match the term to its definition:

                TERMS:

a)Extension                        b)Colorado Plateau                         c)Canadian Shield

d)Juan De Fuca                 e)Orogeny                                          f)Appalachian Fold Belt

 g) Farallon                          h)Cocos                                                                i)Terrain Accretion

                DEFINITIONS:

1)__This geologic structure has been an “island of stability” since the Precambrian era, meaning that there has been relatively no geologic activity here.

2)__This ancient tectonic plate was subducted under the North American plate.

3)__This process is taking place in the Basin and Range province of the United States. Normal faults are a result of this process.

4)__These are episodes of mountain building that deform plate boundaries.

5) __This is the process by which continents grow.

6)__Ancient rocks in this formation contain iron, gold, copper, diamond, and nickel.

7)__This geologic structure was produced during the assembly of Pangaea from 470 to 270 million years ago.

8)__&__The North American plate overrode the plate mentioned in question number 2. Today all that’s left of that plate are these two separate plates that continue to subduct.

Part b) Name the 4 types of accreted terrain:

Part c) True or False:

                Mark T (true) or F (false) in the blank provided:

                                1)__Between India and Eurasia is a zone of continental divergence.

2)__Sedimentary basins and domes of the stable interior platform of North America contain uranium, coal, oil, and gas.

3)__New continental crust is added worldwide at 200 cubic kilometers per year.

4)__New continental crust forms via subduction zone magmatism.

5)__Continental fragments tend to cluster up together.

6)__ The Appalachian Mountains pre-date the Atlantic Ocean.

7)__Wrangellia is a basalt plateau that has moved 5000 kilometers to its present location.

8)__The North American cordillera includes a younger complex of mountain ranges and deformation belts near west coast mountain ranges and the Sierra Nevada.

9)__ Upwelling in mantle currents cause crustal compression.

10)__ The oldest rock material in North America is a 3.96 billion year old schist in California.