Lecture 2 Flashcards
1
Q
What 4 features make good index fossils?
A
Wide geographical distribution, Rapid evolution, Abundant and easy to find, Ease of identification
2
Q
What are the two stable oxygen and carbon isotopes?
A
O16/O18 and C12/C13
3
Q
What does PDB stand for?
A
The belemnite from the PD formation
4
Q
How are forams used to determine past ocean temperatures?
A
Compare foram oxygen ratio to that of standard (PDB) to arrive at temperature during test formation
5
Q
What can the carbon isotope of forams be used to measure?
A
Ocean productivity
6
Q
How do ostracods (anthropods) grow?
A
Moulting
7
Q
Where do ostracods live?
A
Fresh and marine waters on the bed (benthic)
8
Q
A variation in morphology in relation to environment is known as?
A
Ecophenotypy
