GEOG 1265 Chapter Notes - Chapter 12: Continental Crust, Uniformitarianism, Seafloor Spreading
27 Jan 2017
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Document Summary
Endogenic systems: internal, powered by heat energy from within the planet. Exogenic systems: external, powered by insolation and influenced by gravity. Geomorphology: subfield within physical geography that studies the development and spatial distribution of landforms. Uniformitarianism: the most fundamental principle of earth science. Assumes that the same physical processes active in the environment today have been operating throughout geological time. Geologic time scale: an effective device for organizing the vast span of geological time. Stratigraphy: the study of layered rock strata, including its sequence (superposition), thickness, and spatial distribution, which yield clues to the age and origin of the rocks. Core: differentiated into an inner core and an outer core, divided by a transition zone. Mantle: lies a(cid:271)o(cid:448)e earth"s (cid:272)ore. differe(cid:374)tiated i(cid:374)to lo(cid:449)er (cid:373)a(cid:374)tle a(cid:374)d upper (cid:373)a(cid:374)tle. Mohorovi i discontinuity (cid:894)moho(cid:895): boundary between uppermost mantle and the crust. Contains pockets of increased heat from radioactive decay and is susceptible to slow convective currents in these hotter materials.
