Brandon Bridge Formation

{{Short description|Geologic formation in Wisconsin}}

{{Infobox rockunit

| name = Brandon Bridge Formation

| image = Dalmanitid trilobite.jpg

| caption = Waukeshaaspis eatonae, a dalmanitid trilobite found in great abundance within the formation

| type = Formation

| age = {{fossilrange|Telychian}}

| period = Telychian

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| region = Wisconsin

| country = United States

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The Brandon Bridge Formation is a geologic formation in Wisconsin. It preserves fossils dating back to the Silurian period, including those of graptolites, conodonts and Parioscorpio.{{Cite web |last=Magazine |first=Jack Tamisiea, Hakai |date=2021-05-09 |title=A Milwaukee Suburb Is Full of Ultrarare Fossils |url=https://www.theatlantic.com/science/archive/2021/05/milwaukee-suburb-rare-fossils/618833/ |access-date=2023-09-25 |website=The Atlantic |language=en}}