GEOL 2530 Lecture Notes - Lecture 13: Foraminifera, Diagenesis, Pattern Matching

• School: University of Manitoba
• Department: Geological Sciences
• Course: GEOL 2530
• Professor: Chow Nancy

Document Summary

Chronostratigraphy the establishing of time relations in stratified successions. Geochronology the timing or age of events in earth"s history. North american stratigraphic code: chronostratigraphic (time-rock units) Rock strata that are reference sections for all rocks formed during same time interval: geochronologic (time units) Represent the time interval during which corresponding chronostratigraphic unit was deposited: geochronometric (pure time units) Systematic hierarchy of chronostrat. units geologic time represent complete geologic record. Development: time-stratigraphic relationships from local sections, international composite chronostratigraphic scale. Earliest proposed - second latest proposed - latest proposed - But controversy over system boundaries & some subdivisions ongoing revision. Brasier, m, cowie, j. and taylor, m. , 1994. Ratified in 1992 by international commission on stratigraphy (ics) Knoll, a. h. , walter, m. r, narbonne, g. m. and christie-blick, n. , 2006. The ediacaran period: a new edition to the geologic time scale. 4: chronostratigraphic scale converted to geochronologic scale. Fossil succession dating of geologic record: identify datum events - short-lived, widespread, easily identifiable.