Gunflint microfossils

Gunflint microfossils

      assemblage of microscopic fossils uncovered in the Gunflint Iron Formation, a rock layer about two billion years old exposed in western Ontario, Canada. The fossils include filamentous structures resembling blue-green algae (e.g., Gunflintia, Entosphaeroides, and Animikiea), tiny spheroids (e.g., Eosphaera and Huroniospora), star-shaped forms assigned to the genus Eoastrion, and umbrella-shaped forms assigned to the genus Kakabekia. These and other fossils were first collected near Thunder Bay, Ont., in the 1950s. Analyses yield strong evidence that some of these fossils are the remains of some of the earliest photosynthetic organisms.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …   Universalium

  • algae — algal, adj. /al jee/, n.pl., sing. alga / geuh/. any of numerous groups of chlorophyll containing, mainly aquatic eukaryotic organisms ranging from microscopic single celled forms to multicellular forms 100 ft. (30 m) or more long, distinguished… …   Universalium

  • Fossil — For other uses, see Fossil (disambiguation). Three small ammonite fossils, each approximately 1.5 cm across …   Wikipedia

  • Chert — For the Spanish municipality, see Xert. Chert Chert (  / …   Wikipedia

  • Chert (Gestein) — Cherts (dunkle Lagen) im devonischen Corriganville New Creek Kalkstein, Everett, Pennsylvania Cherts (im Deutschen oft unter dem Namen Hornstein) sind sedimentär und diagenetisch entstandene Kieselgesteine …   Deutsch Wikipedia

  • Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia

  • Elso S. Barghoorn — Elso Sterrenberg Barghoorn (* 30. Juni 1915 in New York City; † 27. Januar 1984) war ein US amerikanischer Paläontologe (Paläobotanik). Er war ein international anerkannter Experte für präkambrische Algen Fossilien. Er fand einige der ältesten… …   Deutsch Wikipedia

  • Paleobiology — (sometimes spelled palaeobiology) is a growing and comparatively new discipline which combines the methods and findings of the natural science biology with the methods and findings of the earth science paleontology. It is occasionally referred to …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”