Rockslide Formation

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| name = Rockslide Formation

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| type = Formation

| period = Drumian

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| region = Northwest Territories

| country = Canada

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The Rockslide Formation is a geologic formation in Northwest Territories. It preserves fossils dating back to the Drumian (Plagiura-Pogiella to Bolaspidella Zone).{{cite journal |author=Julien Kimmig & Brian R. Pratt |year=2015 |title=Soft-bodied biota from the middle Cambrian (Drumian) Rockslide Formation,Mackenzie Mountains, northwestern Canada |journal=Journal of Paleontology |volume=89 |issue=1 |pages=51–71 |doi=10.1017/jpa.2014.5 |s2cid=130268424 }}

It was deposited in deep water on a reasonably distal slope; it contains carbonates, debris flows and siliciclastic siltstones, the latter being the fossil bearing horizons. It also contains deep-water microbial reefs.{{Cite journal|title=Deep-Water Girvanella-Epiphyton Reef On A Mid-Cambrian Continental Slope, Rockslide Formation, Mackenzie Mountains, Northwest Territories|url=http://archives.datapages.com/data/cspg_sp/data/013/013001/161_cspgsp0130161.htm|journal=|year=1988 |pages=161–164 |last1=Pratt |first1=Brian R. }}