Methods To Research Past Conditons Flashcards
(4 cards)
1
Q
What is radioisotope composition?
A
Can be used to date samples such as ratio of carbon12:carbon 14
2
Q
What can the ratio of oxygen be used for?
A
To estimate past temperatures
O18:O16
3
Q
Analysing air bubbles from ice cores can be used to…
A
Estimate composition of past atmosphere
4
Q
Ratio of magnesium to calcium in calcite deposits
A
Used to estimate temperate
• More magnesium = higher temps
