Sequence (geology)

In geology, a sequence is a stratigraphic unit which is bounded by an unconformity at the top and at the bottom.[1]

Definition

In a more rigorous and general way a sequence is defined as a

"relatively conformable [...], genetically related succession of strata bounded by unconformities or their correlative surfaces"[2]

Special cases of sequences include type 1 sequences and type 2 sequences.[3] A related concept are parasequences. Contrary to their name they are not smaller sequences.

gollark: Well, you could presumably fix enough of the problems that people can live an extra 100 years, and deal with whatever issues crop up in the meantime over that time.
gollark: I see.
gollark: Why not?
gollark: Death is bad and should be eliminated, in time.
gollark: I disagree.

See also

References
  1. Catuneanu, Octavian (2011). "Sequence stratigraphy: methodology and nomenclature". Newsletters on Stratigraphy. E. Schweizerbart'sche Verlagsbuchhandlung. 44 (3): 183.
  2. Patzkowsky, Mark E.; Holland, Steven M. (2012). Stratigraphic Paleobiology. Chicago: University of Chicago University Press. p. 220.
  3. Patzkowsky, Mark E.; Holland, Steven M. (2012). Stratigraphic Paleobiology. Chicago: University of Chicago University Press. pp. 42–43.


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