From Today In Science History:
Arkell was an English paleontologist who was an authority on Jurassic ammonites and their environments. He wrote
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He made numerous contributions to knowledge of the Jurassic stratigraphy, and gradually stabilized many stratigraphically significant zonal assemblages. In 1946, his "Standard of the European Jurassic" advocated a commission formulate a code of rules for stratigraphical nomenclature. image