Ashlock Formation

{{Infobox rockunit

| name = Ashlock Formation

| image = Brachiopod fossil (Ashlock Formation, Upper Ordovician; Paint Lick Elementary School outcrop, Garrard County, Kentucky, USA) 4.jpg

| caption = Brachiopod fossil from the Ashlock Formation

| type = Formation

| age = Ordovician

| period = Ordovician

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| region = Kentucky

| country = United States

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| underlies = Drakes Formation

| overlies = Calloway Creek Formation

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The Ashlock Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Ordovician period .