Stratigraphy Flashcards
subdivision of the stratigraphic record into sediments or rocks by means of lithologic
Lithostratigraphy
subdivision of the stratigraphic record into sediments or rocks by means of fossil content
Biostratigraphy
subdivision of the stratigraphic record into bodies of sediment or rock represented by a particular
age
Chronostratigraphy
subdivision of Earth history into time intervals
Geochronology
units of Chronostratigraphy in order (Pababa)
Eonothem
Erathem
System
Series
Stage
Chronozone
units of Geochronology in order (Pababa)
Eon
Era
Period
Epoch
Age
Chron
Series/Epoch of Cenozoic Era
Holocene
Pleistocene
Pliocene
Miocene
Oligocene
Eocene
Paleocene
System/Period of Mesozoic Era
Cretaceous
Jurassic
Triassic
System/Period of Paleozoic Era
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
fundamental unit of lithostratigraphic classification;
Formation
Lithostratigraphic units are commonly
diachronous
The fundamental biostratigraphic unit
zone
Secular variations, continuous changes of the position of the
magnetic poles, take place over time scales of
10^1 to 10^3 years
Reversals from ‘normal’ polarity to ‘reversed’ polarity occur over
time scales of
10^4 to 10^6 years
The body of strata representing the known stratigraphic and geographic range of occurrence of a particular
taxon or combination of two taxa of any rank.
Range zone
The body of fossiliferous strata between two specified biohorizons.
Interval Zone
The body of strata containing specimens representing a specific segment of an evolutionary lineage.
Lineage zone
The body of strata characterized by an assemblage of three or more fossil taxa that, taken together,
distinguishes it in biostratigraphic character from adjacent strata.
Assemblage zone
The body of strata in which the abundance of a particular taxon or specified group of taxa is significantly greater than is usual in the adjacent parts of the section.
Abundance Zone
a surface of erosion or non-deposition between younger and older beds that are parallel to each
other
Disconformities
an unconformity in which the
beds are at an angle to each other
angular unconformities
eroded metamorphic or igneous rocks are covered by sedimentary rocks
Nonconformity
Is considered as the founding father of stratigraphy.
Nicolaus Steno
refers to an unconformity where the beds are parallel and the contact between the
stratified rocks is just a simple bedding plane.
Paraconformity