Results 91 to 100 of about 8,820 (215)

The nagssugtoqidian orogen in South-East Greenland: evidence for paleoproterozoic collision and plate assembly

, 2008
The 200 km wide, east-west trending Paleoproterozoic mobile belt of the Ammassalik region of South-East Greenland contains a diverse assemblage of Paleoproterozoic and Archean rocks, variably affected by Paleoproterozoic deformations and high-grade low ...
Clark R L Friend (20199522), Allen Nutman (19587061), Feiko Kalsbeek (8738454)   +2 more
core   +1 more source

High pCO2-induced exopolysaccharide-rich ballasted aggregates of planktonic cyanobacteria could explain Paleoproterozoic carbon burial

Nature Communications, 2018
A Paleoproterozoic carbon isotope anomaly is likely linked to burial of oceanic cyanobacteria, but it is not clear how burial occurred. Here, the authors find that, under Paleoproterozoic pCO2 conditions, planktonic cyanobacteria increase ...
Nina A. Kamennaya, Marcin Zemla, Laura Mahoney, Liang Chen, Elizabeth Holman, Hoi-Ying Holman, Manfred Auer, Caroline M. Ajo-Franklin, Christer Jansson   +8 more
doaj   +1 more source

Primordial magnetotaxis in putative giant paleoproterozoic magnetofossils

Proceedings of the National Academy of Sciences
Magnetotactic bacteria produce chains of nanoscopic iron minerals used for navigation, which can be preserved over geological timescales in the form of magnetofossils. Micrometer-sized magnetite crystals with unusual shapes suggesting a biologically controlled mineralization have been found in the geological record and termed giant magnetofossils.
Ualisson Donardelli Bellon, Wyn Williams, Ricardo Ivan Ferreira Trindade, Lara Maldanis, Douglas Galante   +4 more
openaire   +3 more sources

Genesis of the Archean–Paleoproterozoic Tabletop Domain, Rudall Province, and its endemic relationship to the West Australian Craton

, 2018
The Tabletop Domain of the Rudall Province has been long thought an exotic entity to the West Australian Craton. Recent re-evaluation of this interpretation suggests otherwise, but is founded on limited data.
L. J. Morrissey (5370428), M. Szpunar (5370425), J. L. Payne (5370419), N. M. Tucker (5370422)   +3 more
core   +1 more source

DataSheet1_Tectonic Juxtaposition of Two Independent Paleoproterozoic Arcs by Cenozoic Duplexing in the Arun Tectonic Window of the Eastern Nepalese Himalaya.DOCX

, 2022
The tectonic evolution of the Himalayan orogenic belt before Cenozoic convergence is important to understand its modern structural framework. There is still controversy regarding the tectonic history of the lower Lesser Himalaya Sequence (LHS) in the ...
Songjian Ao (7335755), Saunak Bhandari (11138066), Rui Li (4631), Karel Schulmann (2842937), Wenjiao Xiao (2816182), Qigui Mao (11640707), Dongfang Song (7335758), Zhou Tan (223704), Hao Wang (39217)   +8 more
core   +1 more source

Self-guided walking tour of Paleoproterozoic stromatolites in the Medicine Bow Mountains, Wyoming

, 2014
Self-guided walking tour of Paleoproterozoic stromatolites in the Medicine Bow Mountains, Wyoming WSGS PubID: MR-1906 ...
D.R. Lageson (10070293), H.C. Beeler (10070077), D.W. Boyd (10070290)   +2 more
core   +1 more source

Table1_Tectonic Juxtaposition of Two Independent Paleoproterozoic Arcs by Cenozoic Duplexing in the Arun Tectonic Window of the Eastern Nepalese Himalaya.XLSX

, 2022
The tectonic evolution of the Himalayan orogenic belt before Cenozoic convergence is important to understand its modern structural framework. There is still controversy regarding the tectonic history of the lower Lesser Himalaya Sequence (LHS) in the ...
Songjian Ao (7335755), Saunak Bhandari (11138066), Rui Li (4631), Karel Schulmann (2842937), Wenjiao Xiao (2816182), Qigui Mao (11640707), Dongfang Song (7335758), Zhou Tan (223704), Hao Wang (39217)   +8 more
core   +1 more source

Reappraisal of the Sumé Complex: geochemistry and geochronology of metaigneous rocks and implications for Paleoproteorozoic subduction-accretion events in the Borborema Province, NE Brazil

Brazilian Journal of Geology, 2019
The Alto Moxotó Terrane represents the largest exposure of Paleoproterozoic rocks in the central Borborema Province. Several medium- to high-grade metamorphic units are described in the terrane, however geochronological data are still scarce, and the ...
Edilton José dos Santos, Lauro Cézar Montefalco de Lira Santos   +1 more
doaj   +1 more source

Pb Isotope Mapping of Paleoproterozoic Gneisses in the SW Grenville Province: Evidence for a Cryptic Continental Suture

Geosciences, 2018
New whole-rock lead (Pb) isotope analyses are presented in this study for granitoid orthogneisses from the Southwest Grenville Province in Ontario and Western Quebec.
Gabriel A. Arcuri, Alan P. Dickin
doaj   +1 more source

PALEOPROTEROZOIC MINISTROMATOLITES OF KARELIA: STRUCTURE AND COMPOSITION

Proceedings of the Karelian Research Centre of the Russian Academy of Sciences, 2019
The main subdivisions among the most widespread column types in the Paleoproterozoic complex of Karelian ministromatolites were identified based on their characteristic morphological features. That helps to refine the classification of the class Ministromatophyceae (ministromatolites) and systematize the available material. Individual petrographic thin
openaire   +3 more sources