Proterozoic life forms.    From Wordnet, Princeton University. 

The Archaean occurs between the Hadean and the Proterozoic.    From Wordnik.com.  [Archaean] Reference

Late Proterozoic, so let's say 1,000 to 542.0 million years ago.    From Wordnik.com.  [Of Books and the Sea] Reference

This in turn surrounds less common remnants of Proterozoic sediments.    From Wordnik.com.  [Australian Fossil Mammal Sites, Australia] Reference

Eukaryotic one-celled organisms became dominant in the Proterozoic Eon.    From Wordnik.com.  [Geologic time] Reference

Proterozoic modular biomineralized metazoan from the Nama Group, Namibia.    From Wordnik.com.  [The Cambrian as an evolutionary exemplar - The Panda's Thumb] Reference

Knoll and Carroll think there was a mass extinction event at the Proterozoic-Cambrian border.    From Wordnik.com.  [Continuation…] Reference

Stromatolites increased in abundance throughout the Archaean, but began to decline during the Proterozoic.    From Wordnik.com.  [Archaean] Reference

I realise that the Archean is assumed to have two to three times as much volcanic activity as the Proterozoic….    From Wordnik.com.  [Luskin vs. Science (and Scientific American) - The Panda's Thumb] Reference

I took this picture of a Late Proterozoic 575Mya “pizza disk” fossil near Mistaken Point, Newfoundland last summer.    From Wordnik.com.  [Steve Steve and end of the Cambrian Explosion as we know it (part 1) - The Panda's Thumb] Reference

Hear the rhapsody in cyan that cyanobacteria composed in bridging the Archaean and Proterozoic eons of geologic history.    From Wordnik.com.  [The greatest story ever told] Reference

Sadiola is a sediment hosted gold deposit occurring within a sequence of lower Proterozoic Birimian rocks in western Mali.    From Wordnik.com.  [ANC Daily News Briefing] Reference

The Fundy Coast bedrock is composed of Proterozoic, Palaeozoic, and Mesozoic strata which rises from sea level to 215 m asl.    From Wordnik.com.  [New England-Acadian forests] Reference

Subsequently, in the Proterozoic Era, the Taishan region began to rise, becoming part of the continent by the end of the era.    From Wordnik.com.  [Mount Taishan Scenic Beauty and Historic Interest Zone, China] Reference

The Proterozoic, Archean and Hadean are often collectively referred to as Precambrian Time, and sometimes also as the Cryptozoic.    From Wordnik.com.  [Table of geologic time - The Panda's Thumb] Reference

Thus the Archean represents 47 percent of the Earth's age, the Proterozoic 40 percent and the Phanerozoic the remainder of 13 percent!.    From Wordnik.com.  [Report on the 2005 Creation Mega Conference, Part Three - The Panda's Thumb] Reference

Though Proterozoic rock has produced oil in places like Russia and.    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference

Drilling continued with diamond coring through Proterozoic basement granite.    From Wordnik.com.  [Latest News - Yahoo!7 News] Reference

The Proterozoic rock in the Officer Basin is more than 500 million years old.    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference

Proterozoic - first organisms with well-developed cells appeared during this eon.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Scientists have very little information about this era, known as the Proterozoic.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

The Livengood Deposit is hosted in a thrust-interleaved sequence of Proterozoic to.    From Wordnik.com.  [International Tower Hill Continues Expansion of the Core Zone at Depth at the Livengood Project, Alaska - Yahoo! Finance] Reference

The oldest well-preserved examples come from mid-Proterozoic rocks that are about 1.    From Wordnik.com.  [Naturejobs - All Jobs] Reference

It resembles an ecosystem of the Proterozoic period 2.5 billion to 650 million years ago.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Proterozoic, Archaean, and Hadean. animal fossils suddenly appeared 542 million years ago.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

This was metamorphosed during Svecokarelian orogeny (mountain building event) in the Proterozoic.    From Wordnik.com.  [Featured Articles] Reference

With close colleagues I reconstruct the origin and evolution of nucleated cells in the Proterozoic Eon.    From Wordnik.com.  [911Blogger.com - Paying Attention to 9/11 Related News] Reference

Regionally the property is situated within an extensive area of metaclastic sediments of Proterozoic Age.    From Wordnik.com.  [Marketwire - Breaking News Releases]

Proterozoic granites of the Llano Uplift, Texas: A collision-related suite containing rapakivi and topaz granites.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Hieshima, and Roger E. Summons, “Terminal Proterozoic Reorganization of Biogeochemical Cycles,” Nature, July 6, 2002.    From Wordnik.com.  [When a Billion Chinese Jump] Reference

The Livengood Deposit is hosted in a thrust-interleaved sequence of Proterozoic to Palaeozoic sedimentary and volcanic rocks.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

Recent work on chromium isotopes has shown that there were two pulsed increases in atmospheric oxygen in the late Proterozoic.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

It confirms a thick sequence of insulating Cambrian and Proterozoic sediments overlying the basement rock (granitic) heat source.    From Wordnik.com.  [Latest News - Yahoo!7 News] Reference

(That idea cannot be applicable to the last ice age, Pleistocene, since Snowball Earth hypotheses seem restricted to Proterozoic times).    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

The Proterozoic impact record of Australia.    From Wordnik.com.  [Vredefort Dome, South Africa] Reference

Proterozoic of the Gascoyne province.    From Wordnik.com.  [Latest News - Yahoo!7 News] Reference

Proterozoic.    From Wordnik.com.  [Geologic time] Reference

Proterozoic source.    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference

(late Proterozoic) age.    From Wordnik.com.  [neo-resistance] Reference

(both of Neo-Proterozoic age).    From Wordnik.com.  [StreetInsider.com News Articles] Reference