Nacatoch Sand

{{Infobox rockunit

| name = Nacatoch Sand

| image = Bulletin 429 Plate XV B Cretaceous reptile burrow.jpg

| caption = Nacatoch Sand with trace fossil near Washington, Arkansas (1910)

| type = Formation

| age = Cretaceous

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| region = Arkansas

| country = United States

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The Nacatoch Sand is a geologic formation in Arkansas. It preserves fossils dating back to the Cretaceous period.