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: Maybe I should writing.
gollark: Thank you.
gollark: It should work. This is inexcusable. If this continues I may be forced to do a neck transplant.
gollark: Also, this spare phone keeps running out of RAM and Discord keeps using 12-hour time somehow.
gollark: Mostly fine, although for some odd reason my neck hurts slightly if I turn it left.

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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