What word or phrase does your mother always say?
the branch of ecology dealing with fossil plants and animals and their ancient environment
paleoecologic, adj; paleoecologically, adv; paleoecologist, n
paleoecology pa·le·o·e·col·o·gy (pā'lē-ō-ĭ-kŏl'ə-jē)
The branch of ecology that deals with the interaction between ancient organisms and their environment.