GEOL 11042 Lecture Notes - Lecture 3: Silt, Cenozoic, Geologic Time Scale
8 Nov 2020
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Focus questions: what are the major families of rocks, how can we identify the order of events in the rock record, rock cycle. Assemblages of mineral grains that have crystallized out of molten material (e. g. , magma, lava) coming from great depths inside the earth. Examples are granite and basalt: extrusive- means the molten material reached the earth"s surface (lava) and crystallized, craters of the moon national monument. Intrusive- means the molten material crystallized at depth (magma) in the earth: mount rushmore national monument, sd. Rocks that have been altered by temperature and/or pressure (examples are marble, gneiss (pronounced nice ), schist, slate: great smoky mountains national park, tn and nc, principles of stratigraphy. Accumulate in layers called strata (singular = stratum) or beds. The study of these strata, of their relationships, and the fossils and minerals they contain is called.
