Chapter VI: Correlation and Dating of the Rock Record

Question 1

Seismic stratigraphy

Answer 1

determining density of rocks through seismic reflections to find physical discontinuities within buried sediments

Question 2

Marker bed

Answer 2

bed of sediment which covers virtually all layers of the same age; large volcanic eruptions

Question 3

Event stratigraphy

Answer 3

using events such as volcanic eruptions to correlate rock age

Question 4

magnetic stratigraphy

Answer 4

using magnetic alignment of rocks to determine age

Question 5

Transgression/Regression

Answer 5

landward/seaward migration of ocean levels

Question 6

Marker Qualities

Answer 6

Widespread, short time frame, Well Preserved (cosmopolitan, fast evolving, well preserved)

Question 7

Timeline indicators

Answer 7

Index Fossils, Volcanic Ash, Impact Ejecta, Magnetic Statigraphy, Eustatic (global) Sea level