sed·i·men·tol·o·gy 
(sĕd′ə-mən-tŏlə-jē, -mĕn-)
(sĕd′ə-mən-tŏlə-jē, -mĕn-)n.
The science that deals with the description, classification, and origin of sedimentary rock.
sed′i·men′to·logic (-mĕn′tl-ŏjĭk), sed′i·men′to·logi·cal (-ĭ-kəl) adj.
sed′i·men·tolo·gist n.