Changes

* [[Depocenter#Sediment_supply_rate_and_facies_patterns|Prograding]]—caused by lateral accretion of strata

* [[Depocenter#Sediment_supply_rate_and_facies_patterns|Prograding]]—caused by lateral accretion of strata

[[file:exploring-for-stratigraphic-traps_fig21-24.png|300px|thumb|{{figure number|1}}.]]

[[file:exploring-for-stratigraphic-traps_fig21-24.png|300px|thumb|{{figure number|1}}Reflection configurations. From Mitchum et al.;<ref name=ch21r31 /> courtesy AAPG.]]

==Parallel reflector patterns==

==Parallel reflector patterns==

Parallel reflections include subparallel, wavy, and divergent. Parallel, subparallel, and wavy reflectors suggest uniform depositional rates on a uniformly subsiding surface, such as a shelf or basin plain. Divergent reflectors suggest lateral variations in depositional rates or progressive tilting of a depositional surface. [[:file:exploring-for-stratigraphic-traps_fig21-24.png|Figure 1]] shows reflection configurations for this group.

Parallel reflections include subparallel, wavy, and divergent. Parallel, subparallel, and wavy reflectors suggest uniform depositional rates on a uniformly subsiding surface, such as a shelf or basin plain. Divergent reflectors suggest lateral variations in depositional rates or progressive tilting of a depositional surface. [[:file:exploring-for-stratigraphic-traps_fig21-24.png|Figure 1]] shows reflection configurations for this group.

[[file:exploring-for-stratigraphic-traps_fig21-25.png|300px|thumb|{{figure number|2}}Reflection configurations. After Mitchum, et al.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, [http://archives.datapages.com/data/specpubs/seismic1/data/a165/a165/0001/0100/0117.htm Seismic stratigraphy and global changes in sea level, part 6: stratigraphic interpretations of seismic reflection patterns in depositional sequences], in Payton, C., E., ed., Seismic Stratigraphy and [[Applications]] to Hydrocarbon Exploration: [http://store.aapg.org/detail.aspx?id=1157 AAPG Memoir 26], p. 117–133.</ref>]]

[[file:exploring-for-stratigraphic-traps_fig21-25.png|300px|thumb|{{figure number|2}}Five types of discontinuous reflector patterns that help interdepositional systems. After Mitchum, et al.<ref name=ch21r31>Mitchum, R., M., Vail, P., R., Sangree, J., B., 1977, [http://archives.datapages.com/data/specpubs/seismic1/data/a165/a165/0001/0100/0117.htm Seismic stratigraphy and global changes in sea level, part 6: stratigraphic interpretations of seismic reflection patterns in depositional sequences], in Payton, C., E., ed., Seismic Stratigraphy and [[Applications]] to Hydrocarbon Exploration: [http://store.aapg.org/detail.aspx?id=1157 AAPG Memoir 26], p. 117–133.</ref>]]

==Discontinuous reflector patterns==

==Discontinuous reflector patterns==

Five types of discontinuous reflector patterns that help interdepositional systems are shown in [[:file:exploring-for-stratigraphic-traps_fig21-25.png|Figure 2]]. Hummocky strata may be discontinuous point bars and crevasse splays. Chaotic reflectors suggest coarse-grained fluvial or [[turbidite]] channel fills. Contorted features may be shale-prone debris flows. Precise identification of depositional environments requires integration with other data.

Five types of discontinuous reflector patterns that help interdepositional systems are shown in [[:file:exploring-for-stratigraphic-traps_fig21-25.png|Figure 2]]. Hummocky strata may be discontinuous point bars and crevasse splays. Chaotic reflectors suggest coarse-grained fluvial or [[turbidite]] channel fills. Contorted features may be shale-prone debris flows. Precise identification of depositional environments requires integration with other data.

[[file:exploring-for-stratigraphic-traps_fig21-26.png|300px|thumb|{{figure number|3}}After .<ref name=ch21r31 />]]

[[file:exploring-for-stratigraphic-traps_fig21-26.png|300px|thumb|{{figure number|3}}Prograding reflectors and their possible depositional significance. After Mitchum et al.<ref name=ch21r31 />]]

==Prograding reflector patterns==

==Prograding reflector patterns==

One of the most common depositional features observed in seismic sections are clinoforms manifested in a configuration pattern called ''offlap''. Clinoforms are progradational strata that form through the progressive development of gently sloping surfaces. Paleowater depths can be interpreted from the height of prograding clinoforms. [[:file:exploring-for-stratigraphic-traps_fig21-26.png|Figure 3]] shows [[Depocenter#Sediment_supply_rate_and_facies_patterns|prograding]] reflectors and their possible depositional significance.

One of the most common depositional features observed in seismic sections are clinoforms manifested in a configuration pattern called ''offlap''. Clinoforms are progradational strata that form through the progressive development of gently sloping surfaces. Paleowater depths can be interpreted from the height of prograding clinoforms. [[:file:exploring-for-stratigraphic-traps_fig21-26.png|Figure 3]] shows [[Depocenter#Sediment_supply_rate_and_facies_patterns|prograding]] reflectors and their possible depositional significance.

[[file:exploring-for-stratigraphic-traps_fig21-27.png|300px|thumb|{{figure number|4}}.]]

[[file:exploring-for-stratigraphic-traps_fig21-27.png|300px|thumb|{{figure number|4}}Fill patterns. From Mitchum et al.<ref name=ch21r31 />]]

==Channel fill patterns==

==Channel fill patterns==