Conodonts - Lecture 3 Flashcards
1
Q
During what time period did conodonts exist?
A
Cambrian - Triassic
2
Q
What are conodonts composed of?
A
Calcium/Phosphate
3
Q
What group were conodonts members of?
A
Chordates
4
Q
Give some key features of coccoliths
A
Single celled marine organisms, Photosynthetic so lived near the ocean surface
5
Q
What is meant by the CCD (Carbon Compensation Depth) and when does it occur?
A
The depth at which carbonate is no longer preserved. This is around 4500m worldwide although fluctuates between 3500m-5000m being shallowest at the poles
6
Q
Describe Dinoflagellates
A
Photo-plankotn. Single celled algae with no mineralised shells. Major source for oil
