Vocab 27.3 & 27.4 Flashcards
is the process by which water enters Earth and becomes groundwater below the surface.
Infiltration
the upper boundary of the saturated zone
water table
a rock unit that can transfer water though its pore space
aquifer
percentage of a materials total volume of pore space calculated by dividing total volume of the material
porosity
the process of assigning an exact numerical age an organism, an object or and event
absolute dating
the process of placing objects or events in their proper order in time
relative dating
states that the laws of nature operate today as they have in the past
uniformitainism
states that in and undisturbed sequence of sedimentary rock layers
principle of superposition
gaps in the rock record during which either erosion occurred or deposition
unconformities
remains or traces of organisms found in the geologic rock record
fossils