chapter 27.3 & 4 Flashcards
a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.
principles of superposition
Relative dating puts geologic events in chronological order without requiring that a specific numerical age be assigned to each event
relative dating
the process by which water enters earth and becomes ground water
inflitration
the upper boundary of a saturated zone
water table
the transfer of water through pore space
aquifer
percentage of a material’s total volume
porosity
the process of assiging an exact age
absolute dating
which states the law of nature that operates today
uniformitarism
gaps in rock
unconformities
remains or traces of organisms
fossils
what percentage of water on Earth is salt water
97%
what percentage of water on Earth is freshwater
3%
where is the majority of freshwater found
glaciers
where is the smaller percentage of fresh water found
lakes, rivers, ground water
what is percipitaion
rain snow sleet hail