An example of a proxy record used by paleoclimatologists is:
A) tree ring growth.
B) plant leaf shapes.
C) oxygen-isotope ratios in calcite secreting plankton.
D) all of the above.

Question

Quizplus · Accepted Answer

All the options listed are examples of proxy records used by paleoclimatologists to infer past climate conditions. Tree ring growth can indicate annual variations in climate, plant leaf shapes can reflect changes in atmospheric CO2 levels, and oxygen-isotope ratios in calcite secreting plankton can provide information on past ocean temperatures.

An Example of a Proxy Record Used by Paleoclimatologists Is