Woolwich Formation

{{Short description|Geologic formation in England}}

{{Use dmy dates|date=August 2019}}

{{Infobox rockunit

| name = Woolwich Formation

| image =Lambeth Group Gilbert's Pit.jpg

| caption =Exposure in Gilbert's Pit. Dark grey clays, and light grey shelly clays of the Woolwich Formation, overlying the Upnor Formation sands

| type = Formation

| age = Paleogene

| period = Paleogene

| prilithology = claystone, sandstone

| otherlithology = lignite

| namedfor = Gilbert's Pit, Charlton

| namedby =

| region = England

| country = United Kingdom

| coordinates =

| unitof =Lambeth Group

| subunits =

| underlies = Harwich Formation of the Thames Group

| overlies = Upnor Formation

| thickness = max 14.5 m

| extent = London and northern Kent

| area =

| map =

| map_caption =

}}

The Woolwich Formation is a geological formation in southeast England.{{cite web|title= Woolwich Formation|author= British Geological Survey|work=The BGS Lexicon of Named Rock Units|url= http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=WL|access-date= 27 June 2016}} It preserves fossils dating back to the Paleogene period.