Midterm Quizzes

Question 1

Define Seno’s ‘Law of Superposition’:

Answer 1

In an undisturbed sequence of rock, the oldest or first-formed lies at the bottom of the sequence and the youngest or last-formed lies at the top of the sequence.

Question 2

In an anticline, is the oldest stratigraphic layer in the center of the fold?

Answer 2

True

Question 3

Sediments become progressively finer/rounder with increasing distance from land?

Answer 3

True

Question 4

What takes more energy to transport the same distance?

Pebble Clast (or) A Sand Grain

Answer 4

Pebble Clast

Question 5

What color would mudrocks typically be if they were deposited in an oxidizing/continental environment?

Answer 5

Red/Purple

Question 6

Name 3 of the 11 physical sedimentary structures:

Answer 6

• Graded Bedding
• Current Ripples
• Load Casts
• Raindrop Imprints
• Parallel Lamination
• Cross Stratification
• Mudcracks
• Biogenic Structures

Question 7

A sea level change that is experienced globally is:

Answer 7

Eustatic

Question 8

A sea level change that is experienced locally is:

Answer 8

Depositional

Question 9

A sea level change that is experienced regionally is:

Answer 9

Isostatic

Question 10

This type of fossil was an orgainism that is useful as a time indicator. These fossils are:
• Easily identifiable
• Short-lived geologically
• Wide-spread geographically
• Abundant

Answer 10

Guide Fossils
^{_{<em>(Index Fossils)</em>}}

Question 11

These fossils were an organism that was restricted to a specific living environment:

Answer 11

Facies Fossils

Question 12

The ____ the geologic range, the better the Guide Fossil.

Answer 12

Shorter

Question 13

Red/Purple rock color indicates oxidation in ____ Deposition.

Answer 13

Continental

Question 14

Green/Grey/Black rock color indicates oxidation in ____ Deposition.

Answer 14

Marine