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Chapter 8 ESC

TermDefinition
Catastrophism States that Earth’s landscape has been shaped primarily by great catastrophes.
Uniformitarianism the principle that states that geologic processes that occur today are similar to those that have occurred in the past.
Geologic time scale Is the division of Earth history into blocks of time, such as eons, eras, periods, and epochs.
Numerical dates specifies the actual number of years that have passed since the event has occurred.
Relative dating Rocks placed in their proper sequence or order, which determines only the chronologic order of events.
Conformable Layers of rock that have been deposited essentially without interpretation
Unconformity Is a long period during which deposition ceased, erosion removed previously materials.
Fossils Is the remains or traces of prehistoric life, which is essential for interpreting the geologic past.
Paleontology Is just the scientific study of fossils.
Amber The hardened resin of ancient trees that preserve insects.
Tracks Animal footprints made in soften sediment than later turned into sedimentary rock.
Burrows Which is tubes in sediment, wood, or rock made by a animal, and these holes become filled with mineral matter and preserved.
Coprolites Is fossil dung and stomach contents that can provide useful information pertaining to the size and food habits of organisms.
Gastroliths Are highly polished stomach stones that were used in the grinding of food by some extinct reptiles.
Correlation Is the establishment of the equivalence of rocks of similar age in difference areas.
Index fossil Fossils that we widespread geographically and are limited to a short span of geologic time, so their presence provides an important method of matching rocks of the same age.
Radiometric dating It provides a reliable method of calculating the ages of rocks and minerals that contain particular radioactive isotopes.
Atomic Number Is the number of protons in the nucleus.
Mass Number Addition of protons and neutrons in the nucleus.
Isotopes A varying number of neutrons within an atom.
Parent An unstable radioactive isotope.
Daughter product Isotopes resulting from the radioactive decay.
Created by: chadsitypeter
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