[4] The ridge is at the southeastern end of Mount Edziza Provincial Park and gets its name from the knapping of obsidian tools and points by early Tahltan hunters.

The oldest exposed rocks are of Mesozoic or Paleozoic age and are overlain by Miocene alkali basalt flows of the Raspberry Formation.

The Raspberry rocks are overlain by quenched, hydrothermally altered and highly fractured Miocene trachybasalt which comprise the lower subaqueous facies of the Little Iskut Formation.

[4] The Little Iskut rocks are overlain by Miocene comendite or trachyte lava flows and domes of the Armadillo Formation which are in turn overlain by Pliocene alkali basalt of the Kounugu Member of the Nido Formation.

The youngest and uppermost rocks comprising Artifact Ridge are Pliocene alkali basalt flows of the Kitsu Member of the Spectrum Formation which are interbedded with fluvial gravel and paleosols.