Croisaphuill Formation

{{Short description|Geologic formation in Scotland}}

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

{{Infobox rockunit

| name = Croisaphuill Formation

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| type = Formation

| age = Ordovician (Tulean)
~{{fossil range|488.3|472}}

| period = Floian

| prilithology = Limestone

| otherlithology = Chert

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| region = Scotland

| country = United Kingdom

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| unitof = Durness Group

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The Croisaphuill Formation is a geological formation in Scotland. It preserves fossils dating back to the Ordovician period.