Part 13- Palaeothermometry Of The Oceans Flashcards
0
Q
At ambient temperatures which O isotope is CaCO3 enriched in?
What factor is this isotope fractionation dependent on?
A
18O
Temperature!
1
Q
What is the determination of palaeotemperatures for oceans based on?
A
O isotope compositions of CaCO3 differ from that of the water when they precipitate.
2
Q
How were ancient ocean temps originally measured?
A
Using marine sediment cores and measuring the O isotope compositions of foraminifera.
