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'''Depocenter''' refers to an area or site of maximum deposition, or the geographic location of the thickest part of any specific geographic unit in a depositional basin.<ref name=ch04r37>Gary, M., McAfee, R. Jr., Wolf, C., L., 1974, [[Glossary]] of Geology: AGI, 805 p.</ref>

'''Depocenter''' refers to an area or site of maximum deposition, or the geographic location of the thickest part of any specific geographic unit in a depositional basin.<ref name=ch04r37>Gary, M., McAfee, R. Jr., Wolf, C., L., 1974, [https://www.agiweb.org/pubs/glossary/ Glossary of Geology]: AGI, 805 p.</ref>

Within a basin, different areas receive different amounts of sediment through time, resulting in numerous depocenters. Each depocenter is an area containing a thick stratigraphic succession. These different depocenters have unique histories of sediment accumulation, compaction, subsidence, deformation, and [[thermal maturation]] of potential hydrocarbon [[source rock]]s. Delineation of these depocenters is the second step in basin analysis. Subdividing a depocenter into age-significant units and depositional cycles is the topic of section C.

Within a basin, different areas receive different amounts of sediment through time, resulting in numerous depocenters. Each depocenter is an area containing a thick stratigraphic succession. These different depocenters have unique histories of sediment accumulation, compaction, subsidence, deformation, and [[thermal maturation]] of potential hydrocarbon [[source rock]]s. Delineation of these depocenters is the second step in basin analysis. Subdividing a depocenter into age-significant units and depositional cycles is the topic of section C.

==Sediment supply rate and facies patterns==

==Sediment supply rate and facies patterns==

Within each depocenter, facies do one of the following:<ref name=ch04r106>Van Wagoner, J., C., Posamentier, H., W., Mitchum, R., M., Vail, P., R., Sarg, J., F., Loutit, T., S., Hardenbol, J., 1988, An overview of the fundamentals of [[sequence stratigraphy]] and key definitions: an integrated approach: SEPM Special Publication 42, p. 39–45.</ref>

Within each depocenter, facies do one of the following:<ref name=ch04r106>Van Wagoner, J., C., Posamentier, H., W., Mitchum, R., M., Vail, P., R., Sarg, J., F., Loutit, T., S., Hardenbol, J., 1988, An overview of the fundamentals of [[sequence stratigraphy]] and key definitions: an integrated approach: [http://sp.sepmonline.org/content/sepspsel/1.toc SEPM Special Publication 42], p. 39–45.</ref>

* '''Prograde''' if the rate of sediment supply exceeds the rate of [[accommodation space]] formation.

* '''Prograde''' if the rate of sediment supply exceeds the rate of [[accommodation space]] formation.

* '''Aggrade''' if the rate of sediment supply equals the rate of accommodation space formation.

* '''Aggrade''' if the rate of sediment supply equals the rate of accommodation space formation.

==Siliciclastic vs. carbonate supply==

==Siliciclastic vs. carbonate supply==

[[file:sedimentary-basin-analysis_fig4-12.png|thumb|{{figure number|1}}Map of the drainage basin of the modern Mississippi River, illustrating the network of rivers feeding into one sediment input point. Modified. Copyright: Coleman and Roberts<ref name=Coleman_and_Roberts>Coleman, J. M., and H. H. Roberts, 1991, Mississippi River depositional system: model for the Gulf Coast Tertiary, in D. Goldthwaite, ed., An Introduction to Central Gulf Coast Geology: New Orleans Geological Society, p. 99-121</ref>; courtesy New Orleans Geological Society.]]

[[file:sedimentary-basin-analysis_fig4-12.png|thumb|{{figure number|1}}Map of the drainage basin of the modern Mississippi River, illustrating the network of rivers feeding into one sediment input point. Modified. &copy; Coleman and Roberts;<ref name=Coleman_and_Roberts>Coleman, J. M., and H. H. Roberts, 1991, Mississippi River depositional system: model for the Gulf Coast Tertiary, in D. Goldthwaite, ed., An Introduction to Central Gulf Coast Geology: New Orleans Geological Society, p. 99-121</ref> courtesy New Orleans Geological Society.]]