Cook Mountain Formation

{{Short description|Geologic formation in the southern United States}}

{{more citations needed|date=October 2017}}

{{Infobox rockunit

| name = Cook Mountain Formation

| image = Distorsio septemdentata 01.JPG

| caption = Gastropoda fossils from the Cook Mountain Formation

| type = Formation

| age = Paleogene

| period = Paleogene

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| namedfor = Cook Mountain, Houston County, Texas

| namedby = William Kennedy{{cite book|last1=Kennedy|first1=William|title=Third annual report of the Geological Survey of Texas, 1891|date=1891|publisher=Department of Agriculture, Insurance, Statistics, and History, p. 54-57}}

| region = Alabama, Louisiana, Mississippi, Texas

| country = United States

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| underlies = Cockfield Formation

| overlies = Sparta Formation

| thickness =

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The Cook Mountain Formation is a geologic formation in Alabama. It preserves fossils dating back to the Paleogene period.