One of the custom off-topic close reasons on this site currently reads as follows:
Questions about Earth science, unless directly related to phenomena observable on other celestials, Solar system in general of which Earth is a part, or as an origin of observational astronomy where its movement, local/global phenomena might affect observations and measurements, is off-topic. For more information, see the meta discussion.
Now that Earth Science has been in public beta for a little while, I would like to suggest that the close reason be edited to include a link to earthscience.SE. Perhaps something like this (changes in bold, most of which is just copyediting besides the added last sentence):
Questions about Earth science, unless directly related to phenomena observable on other celestial bodies, the Solar System in general of which Earth is a part, or observational astronomy where the Earth's movement or local/global phenomena might affect observations and measurements, are off-topic. For more information, see the meta discussion. You may be able to get help at Earth Science Stack Exchange.