Examples of 'proterozoic' in a sentence
Meaning of "proterozoic"
Proterozoic is a geological era that lasted from around 2.5 billion to 541 million years ago. It is characterized by the formation of the first continents and the appearance of eukaryotic cells. This term is used in the field of geology and earth sciences
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- Of or relating to the geologic eon from 2,500 Ma to 541.0±1.0 Ma.
- The eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.
- Alternative form of Proterozoic
How to use "proterozoic" in a sentence
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proterozoic
The study area includes the proterozoic granites and sediments of quaternary.
The local geology is represented by metamorphic rocks from archean to proterozoic ages.
These newer Proterozoic sediments were then tilted and faulted.
It is in the part of the gully with the Proterozoic rocks.
During the Proterozoic terranes were accreted onto the province.
The first known glaciations occurred during the Proterozoic.
The origins of Proterozoic anorthosites have been a subject of theoretical debate for many decades.
These might be associated with upper Proterozoic rifting processes.
Belo Horizonte lies on a region of contact between different geological series of the Proterozoic.
High initial ratios seem to typify early Proterozoic granitic rocks in this remobilized craton.
Estimates for the age of the basement rock ranges from Archean to early Proterozoic.
The geologic record of the Proterozoic is much better than that for the preceding Archaean.
It is bounded by a mixture of sedimentary basins and Proterozoic fold and thrust belts.
The Proterozoic is a geological eon representing a period before the first abundant complex life on Earth.
These are interpreted to be crystallization dates and indicate a late Proterozoic cogmagmatic relationship.
See also
The proterozoic history of eastern Bolivia.
The majority of the deltaic sediment was derived from Proterozoic sources to the south.
These dikes are Proterozoic and cut across an area of Archean rocks.
Komatiites are found in Archean to Proterozoic greenstone belts.
The Proterozoic saw a couple of severe ice ages called snowball Earths.
Granitoid batholiths and dolerite dikes dating to the Proterozoic frequently intrude into these layers.
This is especially likely for earlier periods such as the Paleozoic and Proterozoic.
It was formed from early Proterozoic to early Paleozoic.
The fault zone is very ancient and initially formed during the Proterozoic Eon.
This latter suggests interactions with Proterozoic inherited structures and the African plume material.
Northern Somalia preserves the best examples of Proterozoic rocks.
The name Proterozoic is Greek for earlier life.
Both are clearly part of the Late Proterozoic magmatic event.
The Arabian continental margin formed in the early Paleozoic and possibly the late Proterozoic.
These rocks are of either Proterozoic or Late Paleozoic age.
With few exceptions rocks are of Archean and Proterozoic age.
Early fungi from the Proterozoic era in Arctic Canada.
The geologic units of the Belcher Islands are Proterozoic.
The Proterozoic era.
Part of this region is underlain by Archean crust with an Early Proterozoic tectonic overprint.
Early Proterozoic felsic volcanic rocks occur in southeast South Dakota.
The Nama Group fossils occur within thrombolitic facies of immense Proterozoic stromatolitic reefs.
Two Proterozoic thermal events are recognized within the Slave Province.
Both are intruded by the Middle Proterozoic Shabogamo gabbro.
Proterozoic eon, oxygen began to accumulate in the atmosphere.
Rocks in this part of Finland are of Archean and Proterozoic age.
Favourable lithologies within the Proterozoic metasedimentary package of the Lake Harbour Group.
The proterozoic rifting episodes caused the nucleation of three major basement structures, the nw-trending pirapor.
Since the Proterozoic.
Proterozoic crust has similar or greater thickness, variable lower crustal velocities, and strong crustal reflectivity.
Late in the Proterozoic.
Proterozoic rocks form much of Wisconsin 's unique deposits.
The Delaware Basin resulted from tilting along areas of Proterozoic weakness in Tobosa basin.
It may be a Proterozoic structure, maybe the leftover of a subduction zone.
The rocks underlying Short Hill are of the late Proterozoic and early Paleozoic eras.
