Megascopic eukaryotic algae from the 2.1-billion-year-old Negaunee Iron-Formation, Michigan

Citation metadata

Authors: Tsu-Ming Han and Bruce Runnegar
Date: July 10, 1992
From: Science(Vol. 257, Issue 5067)
Publisher: American Association for the Advancement of Science
Document Type: Article
Length: 2,204 words

Main content

Abstract :

Hundreds of specimens of spirally coiled, megascopic, carbonaceous fossils resembling Grypania spiralis (Walcott), have been found in the 2.1-billion-year-old Negaunee Iron-Formation at the Empire Mine, near Marquette, Michigan. This occurrence of Grypania is 700 million to 1000 million years older than fossils from previously known sites in Montana, China, and India. As Grypania appears to have been a photosynthetic alga, this discovery places the origin of organelle-bearing eukaryotic cells prior to 2.1 billion years ago.

Source Citation

Source Citation
Han, Tsu-Ming, and Bruce Runnegar. "Megascopic eukaryotic algae from the 2.1-billion-year-old Negaunee Iron-Formation, Michigan." Science, vol. 257, no. 5067, 1992, p. 232+. Accessed 18 June 2021.
  

Gale Document Number: GALE|A12426886