Paleoproterozoic - Open Access .click

Results 91 to 100 of about 5,261 (211)

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

Paleoproterozoic Reworking of Archean Crust and Extreme Back‐Arc Metamorphism in the Enigmatic Southern Trans‐Hudson Orogen

Geophysical Research Letters
The crustal evolution of the southernmost ∼2000–1800 Ma Trans‐Hudson orogen (THO) is enigmatic due to burial by Phanerozoic sediments. We provide new insights through petrochronologic analysis of a paragneiss drill core sample.
Ian W. Hillenbrand +6 more
doaj +1 more source

Supplemental Material: Andean-type, bivergent crustal shortening in the Rinkian orogen: New constraints on the tectonic evolution of Laurentia–West Greenland in the Paleoproterozoic

, 2023
John Grocott, et al.
openalex +2 more sources

Exploring paleoproterozoic metamorphism in the western Río de la Plata craton from drill-core evidence