Stratigraphy

Question 1

“Laws” of Stratigraphy

Answer 1

1.Superposition (Youngest on top of oldest)
2.Original horizontality (Sediment deposits horizontal)
3.Lateral Continuity (Rock across from each other continue to the other side)
4.Cross-cutting relationships (the rock that is cross cut is younger than rock around it)

Question 2

Unconformities

Answer 2

Caps in stratigraphic record

Question 3

Types of Unconformities

Answer 3

1. Angular
2. nonconformity
3. Disconformity
4. Paraconformity

Question 4

What are Facies?

Answer 4

Sediments or sedimentary rock that share some aspect of appearance

Question 5

Fundamental unit of Lithostratigraphy?

Answer 5

Formation

Question 6

Lithostratigraphy is

Answer 6

-Correlate by lithology:
1.Mineralogy
2.Grain Size
3.Org. Comp.
4.Sed. Structure
5.Color

Question 7

Walther’s law

Answer 7

Facies occurring in conformable (No break in deposition) vertical Successions also occurred in laterally adjacent environments

Question 8

Lithostratigraphy Limitations

Answer 8

-Not global
-Diachronous

Question 9

Lithostratigraphy usefulness

Answer 9

-Instantaneous
-Can be over wide regions