#algonkian

• Algonkian — An archaic or regional geological term previously used to designate the Late Proterozoic or the final major division of the Precambrian era. As an adjective, it describes the sedimentary and metamorphic rocks formed during this primitive stage of Earth's history.
• Algonkian — The standard international orthographic variant for the geological term 'algonchian'; an obsolete geochronological division designating the Late Proterozoic or the final part of the Precambrian era. As an adjective, it characterizes sedimentary rock strata and metamorphic schists.