Changes

[[file:paleontology_fig3.png|300px|thumb|{{figure number|3}}Correlation of Rodessa Formation lithofacies at Running Duke Field, Houston County, Texas. Cores are indicated by solid vertical lines. (From Scott.<ref name=pt05r142 />)]]

[[file:paleontology_fig3.png|300px|thumb|{{figure number|3}}Correlation of Rodessa Formation lithofacies at Running Duke Field, Houston County, Texas. Cores are indicated by solid vertical lines. (From Scott.<ref name=pt05r142 />)]]

An example of how fossil assemblages affect [[reservoir quality]] and distribution can be seen in the Lower Cretaceous [[reef complexes]] of the Running Duke Field, Houston County, Texas. In these reef complexes, reservoir properties are partially controlled by the ancient communities of reef-building [[mollusks]], [[corals]], and [[algae]] ([[:ile:paleontology_fig3.png|Figure 3]]).<ref name=pt05r142>Scott, R. W., 1990, Models and stratigraphy of mid-Cretaceous reef communities, Gulf of Mexico: SEPM Concepts in Sedimentology and Paleontology, v. 2, 102 p.</ref> The reefs built by corals, algae, and rudists formed shoal water areas where waves and other currents deposited oolites and well sorted bioclasts. Diagenetic conditions in this facies formed reservoir [[porosity]]. Recognition of the fossils in cuttings, cores, and thin sections complement petrographic and log analyses and aid in the recognition of reservoir quality rocks.

An example of how fossil assemblages affect [[reservoir quality]] and distribution can be seen in the Lower Cretaceous [[reef complexes]] of the Running Duke Field, Houston County, Texas. In these reef complexes, reservoir properties are partially controlled by the ancient communities of reef-building [[mollusks]], [[corals]], and [[algae]] ([[:ile:paleontology_fig3.png|Figure 3]]).<ref name=pt05r142>Scott, R. W., 1990, Models and stratigraphy of mid-Cretaceous reef communities, Gulf of Mexico: SEPM Concepts in Sedimentology and Paleontology, v. 2, 102 p.</ref> The reefs built by corals, algae, and rudists formed shoal water areas where waves and other currents deposited oolites and [[Core_description#Maturity|well-sorted]] bioclasts. Diagenetic conditions in this facies formed reservoir [[porosity]]. Recognition of the fossils in cuttings, cores, and thin sections complement petrographic and log analyses and aid in the recognition of reservoir quality rocks.

===Source rocks===

===Source rocks===