Howya Bingly

Sorry I couldn't answer yer query earlier, but me tedasaurus was in hock - gamblen debts, ya know.

Anyways, hydrology is the study of water on earth whereas hydrogeology is water underground.

Hope this answers yer query and I told Idi the Mean from the pawn shop that ya'd pay fer me tedasaurus. I gave him yer phone number and address, if that's ok. He should be around later.

GallantTed