THE FOURTH DIMENSION SUBMISSION FORM (FD-1)

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Email this assignment to Michelle O'Dea

ANSWER PARTS 1, 2, 3 and 4.
When you have finished, email the entire form to your instructor.

PART 1. INSTRUCTIONS: Consult your Journal to answer the following questions:

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1. Sediment is derived from the weathering of 'source' rocks. Can any mineral whatsoever that is present in the source rocks be present in fragmental sediment when it is deposited?: (Yes/No)
 
2. Which of the three modes of rock origin - igneous, metamorphic, and sedimentary - can form rocks with crystalline texture?: (Name which of the three modes.)
 
 
 
3. What transportation/depositional processes or conditions result in sediment that is well sorted?: (Choose and name one or two or three of the following: ice/stream/landslide)
 
 
4. Where, specifically, is vesicular glass rather than non-vesicular glass likely to occur?: 
	
 
 
 
 
5. A lava flow is made up of glass in which are embedded half-inch long, well-formed crystals of feldspar. How might such a texture originate?:
	
 
 
 
 
 
 
6. Describe one textural change that accompanies increasing metamorphism in the vicinity of a large intrusive igneous body.:
 
 
7.  How does graded bedding tell you if a rock layer is right-side-up or up-side-down?:
 
 
 
 
 
 
8. How may a lava flow be distinguished from a sill? 
 
 
 
 
 
 
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PART 2. INSTRUCTIONS: Refer to the 'Quiz: Determining Absolute Age From Pattern Match' on the 'Absolute Age' webpage to answer the following question:

PART 3. INSTRUCTIONS: Refer to the 'Quiz: Radiometric Dating' on the 'Absolute Age' webpage to answer the following question:

PART 4. INSTRUCTIONS: Refer to 'Quiz: Deciphering a Sample of Earth History' located on the 'Unfolding the History of the Earth' webpage to answer the following questions:

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11. Which igneous body is the oldest?: A, B, or C. 
My answer to Question 11: (A, B, or C):
 
 
12: What is the number of the oldest sedimentary layer? 
My answer to Question 12: 
 
13: List the following events from oldest (first) to youngest (sixth): (a) Folding of layers 3-13. (b) Faulting along line F-F. (c) Erosion down to U1-U1. (d) intrusion of 'C'. (e) deposition of layers 30-35. (f) intrusion of 'B'. 
My answer to Question 13: (Place one of the letters 'a', 'b', 'c', 'd', 'e' or 'f' next to each event):
     First event:
     Second event:
     Third event:
     Fourth event:
     Fifth event:
     Sixth event:
 
14-20: What is the age of layer 32 in millions of years? Of layer 42? Of layer 7? Of unconformity U3-U3? Of unconformity U2-U2? Of unconformity U1-U1? Of fault F-F? Your answers should be either a number or the phrase "cannot be determined".
My answers to Questions 14-20:
    14. The age of layer 32 in millions of years is: 
    More than:       Less than:    
 
    15. The age of layer 42 in millions of years is: 
    More than:       Less than:   
 
    16. The age of layer 7 in millions of years is: 
    More than:       Less than:        
 
    17. The age of U3-U3 in millions of years is: 
    More than:       Less than:    
 
    18. The age of U2-U2 in millions of years is: 
    More than:       Less than:    
 
    19. The age of U1-U1 in millions of years is: 
    More than:       Less than:    
 
    20. The age of F-F in millions of years is: 
    More than:       Less than: