Key Definitions

Question 1

Stratigraphy

Answer 1

The study of the origin, relationship and extent of rock layers and the division of Earth History into meaningful sections

Question 2

Lithostratigraphy

Answer 2

Each Layer is a different rock type

Question 3

Chronostratigraphy

Answer 3

Each layer is a different age

Question 4

Biostratigraphy

Answer 4

Each layer contains a different fossil assemblage

Question 5

Stratigraphy is a record of landscape evolution as a result of:

Answer 5

• Sea-level change
• Climate Change
• Tectonic movements and subsidence
• Sediment supply changes (like a big eruption)

Question 6

Facies are distinguished by:

Answer 6

“Lithological, structural, and organic aspects detectable in the field”

Question 7

Lithofacies:

Answer 7

How does that rock look

Question 8

Facies Model

Answer 8

A general summary of a specific sedimentary environment, written in terms that make the summary useable.

Question 9

Purpose of facies model:

Answer 9

1. A norm, for purposes of comparison
2. A framework and guide for future observations
3. A predictor in new situations
4. A basis for interpretation

Question 10

Facies successions

Answer 10

How facies change vertically through the stratigraphic record

Question 11

Formations

Answer 11

Mappable lithofacies units given names