Headon Formation

{{Short description|Gological formation in Hampshire, England}}

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

{{Infobox rockunit

| name = Headon Formation

| image =

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| type = Formation

| age = Bartonian

| period = Paleogene

| prilithology =

| otherlithology =

| namedfor = Headon Hill

| location_ts = Headon Hill & Whitecliff Bay

| namedby =

| region = England

| country = United Kingdom

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| subunits =

| underlies = Bembridge Limestone

| overlies = Barton Group

| thickness = {{convert|65|m|ft|abbr=on}}

| extent =

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The Headon Formation is a geological formation found in Hampshire, England. It preserves fossils dating back to the Bartonian stage (Eocene).{{Cite web |url=https://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=HE |title=Headon Formation |last=British Geological Survey |website=BGS Lexicon of Named Rock Units |access-date=3 November 2018}}