Proterozoic


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Proterozoic: Cambrian, Geological time scale

Proterozoic

[¦präd·ə·rə¦zō·ik]
(geology)
Geologic time between the Archean and Paleozoic eras, that is, from 2500 million to 550 million years ago. Also known as Algonkian.
References in periodicals archive ?
and Gostin, V.A., 1991, Late Proterozoic (Sturtian) succession of the North Flinders Basin, South Australia: an example of temperate glaciation in an active rift setting, in J.B.
"This is a tough field, and it's difficult to get concrete, convincing information for the Proterozoic Earth.
and Heaman, L.M., 1989, Mackenzie igneous events, Canada: middle Proterozoic hotspot magmatism associated with ocean opening: Earth and Planetary Science Letters, v.
Lake Mackay is an exceptional regional project play with some of the most underexplored Proterozoic geology in Australia.
(3) Monazite 232Th/208Pb ages also support the interpretation that the lower part of the Lesser Himalayan series enjoyed metamorphism in the Proterozoic. Catlos et al.
(eds.), Geochemistry and Mineralization of Proterozoic Volcanic Suites: Geological Society Special Publication (London), no.
Crust from the Proterozoic era is much thicker than crust from more recent periods.
The project consists of two exploration licences E63/1322 and E63/1375 located 120km ESE of Norseman and covers 290km of Proterozoic lithologies of the Biranup and Fraser Complex within the eastern Albany-Fraser Orogen.
The collision tectonics has remobilized the Archean to Proterozoic continental lithosphere in a thick NE-dipping ductile slab-like folded Himalayan Metamorphic Belt (HMB).
Evidence for a world-wide Late Proterozoic glacial event (or events) originated with the late Brian Harland of Cambridge University.