1. Ediacaran - Noun
2. Ediacaran - Adjective
3. Ediacaran - Proper noun
Ediacaran (comparative more Ediacaran, superlative most Ediacaran)
(geology) Of a geologic period within the Neoproterozoic era from about 620 to 542 million years ago. [from 20th c.]
Ediacaran
(geology) The Ediacaran period. [from 20th c.]
Ediacaran (plural Ediacarans)
An organism that lived in the Ediacaran period. [from 20th c.]
Around 550 million years ago, on the boundary between the Ediacaran and Cambrian, the first group of cratons eventually fused again with Amazonia, West Africa and the Rio de la Plata cratons. Source: Internet
Boundaries of the Ediacaran The 'golden spike' (bronze disk in the lower section of the image) or 'type section' of the Global Boundary Stratotype Section and Point (GSSP) for the base of Ediacaran period. Source: Internet
However, in 2004, the International Union of Geological Sciences ratified the Ediacaran age to be a geological age of the Neoproterozoic, ranging from to million years ago. Source: Internet
Nevertheless, the definitions of the lower and upper boundaries of the Ediacaran on the basis of chemostratigraphy and ichnofossils are disputable. Source: Internet
Other possible early fossils were found in Russia, England, Canada, and elsewhere (see Ediacaran biota ). Source: Internet
Others acknowledge a few possible or even likely relationships but feel that most of the Ediacaran forms are representatives of unknown animal types. Source: Internet