Cappahayden Formation

{{Short description|Geological formation in Newfoundland, Canada}}

{{Infobox rockunit

| unitof = Signal Hill Group

| period = Ediacaran

| age =

| prilithology = Gray Siltstone{{cite web|url = https://www.gov.nl.ca/iet/files/88-01.pdf |title=GEOLOGY OF THE AVALON PENINSULA, NEWFOUNDLAND}}

| otherlithology =

| type = Formation

| region = {{Flag|Newfoundland}}

| country = {{Flag|Canada}}

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| underlies = Gibbett Hill Formation

| overlies = Renews Head Formation

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| map = Cappahayden Formation map.svg

| map_caption = Occurrence of the Cappahayden Formation in southeastern Newfoundland{{Cite web|url=http://geoatlas.gov.nl.ca/Default.htm|title=Newfoundland & Labrador Geoscience Atlas}}

}}

The Cappahayden Formation is a formation cropping out in Newfoundland. It comprises fine grey sandstones/siltstones with very fine black parallel laminations, rarely with crossbedding.{{cite journal |last1=Williams |first1=H |last2=King |first2=A F |title=Trepassey map area, Newfoundland |date=1979 |doi=10.4095/124055|doi-access=free }}