ESC 1000 Chapter Notes - Chapter 4: Stromatolite, Punctuated Equilibrium, Ordovician
8 Apr 2016
School
Department
Course
Professor
Document Summary
Relaive daing series of common sense approaches to determine the age of a rock relaive to the age of another. Isotopic daing analyical daing methods used to assign a number in age. Five principles of relaive daing: most sediments are deposited in horizontal layers. Excepions are small in scale or special environments: a younger sedimentary or volcanic unit is deposited on top of older units. Principle of superposiion: a younger sediment or rock can contain pieces of an older rock, a younger rock or feature can cut across any older rock or feature. Cross-cuing relaions: younger rocks and features can cause changes along their contacts with older. Contact efect the contact between two rocks leads to a physical or chemical change in both or either. Unconformity buried erosion surfaces which represent large intervals of ime missing from a rock sequence. Angular unconformity a ilted buried erosion surface.
