Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

'''Geometrical analysis''' is simply dividing a basin's sedimentary section into three-dimensional bodies of strata using regionally correlative surfaces or features as boundaries. The [[sequence stratigraphy|sequence stratigraphi]]c approach uses unconformities or other genetically significant features to divide the section into [[depositional sequences]], [[Systems_tracts_and_trap_types|systems tracts]], and/or [[parasequence]]s. Recognizing these correlation features is key to identifying depositional sequences properly.

'''Geometrical analysis''' is simply dividing a basin's sedimentary section into three-dimensional bodies of strata using regionally correlative surfaces or features as boundaries. The [[sequence stratigraphy|sequence stratigraphi]]c approach uses unconformities or other genetically significant features to divide the section into [[depositional sequences]], [[Systems_tracts_and_trap_types|systems tracts]], and/or [[Hierarchy of sequences|parasequence]]s. Recognizing these correlation features is key to identifying depositional sequences properly.

==Procedure==

==Procedure==

===Individual well evidence===

===Individual well evidence===

* Dipmeter changes

* Dipmeter changes

* Gamma-ray log changes in response to increased uranium concentration at exposure surfaces

* [[Basic open hole tools#Gamma rayGamma-ray]] log changes in response to increased uranium concentration at exposure surfaces

* Vertical breaks in thermal maturity profiles (i.e., abrupt vertical change in vitrinite reflection values)

* Vertical breaks in thermal maturity profiles (i.e., abrupt vertical change in vitrinite reflection values)

* Changes in lithology as seen in cores that indicate subaerial exposure or nondeposition, as evidenced by the following:

* Changes in lithology as seen in cores that indicate subaerial exposure or nondeposition, as evidenced by the following: