Grimsby Formation

{{Infobox rockunit

| name = Grimsby Formation

| image = Grimsby Formation Niagara Gorge.jpg

| caption = Grimsby Formation exposed in Niagara Gorge, New York

| type = Formation

| age = Silurian

| period = Silurian

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| region = {{Flag|New York}}

| country = {{Flag|United States}}

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The Grimsby Formation is a geologic formation in New York. It preserves fossils dating back to the Silurian period.