Results 221 to 230 of about 31,446 (282)

Proterozoic stromatolite zonation

American Journal of Science, 1969
The zonation of the Proterozoic of the USSR is reviewed and extension to other places is attempted. Preliminary results are: some of the columnar stromatolites of northern Eurasia occur in other continents and in the same stratigraphic ranges; some of the forms (9species9) of the distinctive columnar types have intercontinental distribution, such as ...
P. E. Cloud, M. A. Semikhatov
openaire   +1 more source

Probable Proterozoic fungi

Paleobiology, 2005
Abstract A large, morphologically heterogeneous population of acanthomorphic acritarchs from the early Neoproterozoic Wynniatt Formation, Victoria Island, northwestern Canada, is ascribed to two form-genera, Tappania and Germinosphaera, but just a single natural taxon, Tappania. Analysis of Tappania morphology shows it to have been an actively growing,
openaire   +1 more source

Proterozoic Mobile Belts

2020
The Indian Subcontinent is comprised of the Archean-Proterozoic cratons, the Aravalli Craton, the Bundelkhand Craton, the Mehghalaya Craton, the Bastar Craton, the Singhbhum Craton and the Dharwar Craton.
A. K. Jain, D. M. Banerjee, Vivek S. Kale   +2 more
openaire   +1 more source

Early Proterozoic climates and plate motions inferred from major element chemistry of lutites

Nature, 1982
H. Nesbitt, G. M. Young
semanticscholar   +1 more source

Proterozoic orogens

2022
T.R.K. Chetty, K.V. Wilbert Kehelpannala
openaire   +1 more source

Neodymium isotopes in the Colorado Front Range and crust–mantle evolution in the Proterozoic

Nature, 1981
D. DePaolo
semanticscholar   +1 more source

Proterozoic Climates

2021
Grant M. Young, George E. Williams
openaire   +1 more source

Proterozoic Anorthosite Massifs

1985
Major anorthositic massifs intruded stable cratonic crust in the North Atlantic region about 1.4 to 1.7 Ga ago. Similar (meta-) anorthosite massifs (0.9–1.6 Ga) in Grenville and Sveconorwegian terranes exhibit varying degrees of deformational and metamorphic overprint and consequently have ambiguous tectonic settings.
openaire   +1 more source

Hydrocarbon generation characteristics and exploration prospects of Proterozoic source rocks in China

Science China. Earth Sciences, 2019
Wenzhi Zhao, Xiaomei Wang, Suyun Hu, Shuichang Zhang, Huajian Wang, S. Guan, Y. Ye, Rong Ren, Tongshan Wang   +8 more
semanticscholar   +1 more source

United Plates of America, The Birth of a Craton: Early Proterozoic Assembly and Growth of Laurentia

, 1988
P. Hoffman
semanticscholar   +1 more source