Gaptank Formation

{{short description|Geologic formation in Texas, United States}}

{{Infobox rockunit

| name = Gaptank Formation

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| type = Formation

| age = Carboniferous

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| region = Texas

| country = United States

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| overlies = Haymond Formation{{cite Q|Q61049460|pages=21|url=https://pubs.usgs.gov/pp/0187/report.pdf}}

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The Gaptank Formation is a geologic formation in Texas. It preserves fossils dating back to the Carboniferous period.{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org|access-date= 17 December 2021|df= |archive-date= 25 March 2022|archive-url= https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home|url-status= live}}