- Definition
- Properties
- References
A parasequence is a fundamental concept of sequence stratigraphy. Parasequences are not directly related to sequences. Definition A parasequence is defined as an genetically related succession of bedsets that is bounded by marine flooding surfaces (or their correlative surfaces) on top and at the bottom.[1] The succession is supposed to be relatively conformable in the sense that breaks in deposition within the parasequence are much shorter than the time of deposition of the parasequence itself.[2][1] Most parasequences show a shallowing upward,[4] which is sometimes also included into the definition.[5] Properties Since parasequences are relatively conformable, so Walther's law applies within a parasequence. This is not necessarily the case for transitions from one parasequence to another. They are also typically of the size of one up to tens of meters.[4] References [1][2][3][4] 1 : Sequence stratigraphy |