17-1800's
I know that James Hutton is considered a father of modern geology and he was born during some where in the 1720's so that's the closest answer, also Charles Lydel was born during the late 1790's.
Answer:
Well, I'm not sure because degrees Fahrenheit doesn't show. The degrees Celcius depends on Fahrenheit.
Explanation:
The answer is the spring equinox
