Earth climate has a lot to do with weathering of rocks. When the temperature is high, there is more weathering of rocks, when the temperature is low, weathering of rocks is less.
Step-by-step explanation:
Studying the rocks which is the field of Geology is done to study about the minerals, and other useful substances which tells a lot about the climate of the planet Earth.
The increase in the weathering of the rocks tells about the high temperature of the planet Earth. In the previous times, when there was less of carbon dioxide in the atmosphere, the temperature used to be low, there was less weathering of the rocks.