ALGONKIAN • DICTIONARY ONE.COM • Definition of Algonkian

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adjective

Algonkian adj.

Var. of Algonquian.

(Geol.) Pertaining to or designating a period or era recognized by the United States Geological Survey and some other authorities, between the Archaean and the Paleozoic, from both of which it is generally separated in the record by unconformities. Algonkian rocks are both sedimentary and igneous. Although fossils are rare, life certainly existed in this period.

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Etymology of 'Algonkian'

Collaborative International Dictionary of English 0.48

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"Algonkian" Quotes from Famous Books

... contained in minerals of various ages, taken in conjunction with the amount of uranium or parent substance present, afforded ages rising to 1,640 millions of years for archaean and 1,200 millions for Algonkian time. Becker, applying the same method, obtained results rising to quite incredible periods: from 1,671 to 11,470 millions of years. Becker maintained that original lead rendered the determinations indefinite. The more recent results of Mr. A. Holmes support the conclusion that "original" ...

— The Birth-Time of the World and Other Scientific Essays • J. (John) Joly

Words linked to "Algonkian" : Algonquin, Algonquian language, Algonkin, Algonquian