pa·le·o·cli·ma·tol·o·gy 
(pā′lē-ō-klī′mə-tŏlə-jē)
(pā′lē-ō-klī′mə-tŏlə-jē)n.
The study of climatic conditions, and their causes and effects, in the geologic past, using evidence found in glacial deposits, fossils, and sediments.
pa′le·o·cli′ma·tolo·gist n.