Claxby Ironstone

{{Short description|Geological formation in England}}

{{Use dmy dates|date=April 2022}}

{{Infobox rockunit

| name = Claxby Ironstone

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| type = Formation

| age = {{fossilrange|Valanginian|Hauterivian}}

| period = Early Cretaceous

| prilithology = Clay

| otherlithology = Silt, ironstone

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| region = England

| country = United Kingdom

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| underlies = Tealby Formation

| overlies = Spilsby Sandstone

| thickness = Up to 8 m

| extent = The Wash, southern Lincolnshire

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The Claxby Ironstone is a geological formation in England. It preserves fossils dating back to the Cretaceous period.