Results 1 to 10 of about 802 (179)

Grenvillia and Laurentia — a Precambrian Wilson cycle?

Canadian Journal of Earth Sciences, 2014
John Tuzo Wilson coined the term “plate” in plate tectonics. He is famous for inventing transform boundaries, hot spot tracks, and the Wilson cycle of ocean birth, growth, and decline. Less well remembered is his work in the 1950s on tectonic and radiometric age provinces of the Canadian Shield, as part of which he fathered U/Pb geochronology in ...
openaire   +1 more source

Did the Breakout of Laurentia Turn Gondwanaland Inside-Out?

Science, 1991
Comparative geology suggests that the continents adjacent to northern, western, southern, and eastern Laurentia in the Late Proterozoic were Siberia, Australia-Antarctica, southern Africa, and Amazonia-Baltica, respectively. Late Proterozoic fragmentation of the supercontinent centered on Laurentia would then have been followed by rapid fan-like ...
openaire   +2 more sources

Contiguous Laurentia and Baltica before the Grenvillian‐Sveconorwegian orogeny?

Terra Nova, 1996
ABSTRACTClose geochronological correspondence of Mesoproterozoic extension‐related magmatism and comparable tectonic and geochronological evolution of the Grenville and Svecononvegian orogens suggests that the Laurentian and Baltic Shields could have been joined during the Mesoproterozoic and did not separate until after the Grenvillian‐Sveconorwegian ...
openaire   +2 more sources

Icosahedral fracture tessellation of early Mesoproterozoic Laurentia

Geology, 2001
The boundaries of the Laurentian craton conform to edges of two adjacent faces on a truncated icosahedral projection of Earth. The congruence of the geology and the icosahedral tessellation has tectonic significance. It apparently originated as a large-scale fracture pattern during the tectonically quiet early Mesoproterozoic, 100–200 m.y.
openaire   +1 more source

A NEW LOOK AT THE DIABASE OF THE SOUTHWEST LAURENTIA LARGE IGNEOUS PROVINCE (SWLLIP): SPEEDING LAURENTIA AND STAGNANT SLABS

Geological Society of America Abstracts with Programs, 2022
Janet Gordon, James Calzia, Tapani Ramo
openaire   +1 more source

Summary of the Statherian-Calymmian paleogeography of northwestern Laurentia

The ca. 1.75 to 1.27 Ga Hornby Bay intracontinental basin, in northwestern Canada, includes the Big Bear, Mountain Lake, and Dismal Lakes groups. This paper investigates the original depositional environments, paleogeography, and architecture of these groups and how they correlate in time and space.
R H Rainbird, W J Davis
openaire   +1 more source

THE CORE OF LAURENTIA: A SYNOPSIS

Geological Society of America Abstracts with Programs, 2016
openaire   +1 more source

Laurentia in the Balkan Peninsula

Kew Bulletin, 1949
openaire   +1 more source

Was Laurentia part of an Eocambrian supercontinent?

1984
Rob Van der Voo, Chad McCabe, Christopher R. Scotese   +2 more
openaire   +1 more source

EldoradiaandAcrocephalops(Trilobita: Bolaspididae) from the middle Cambrian (Miaolingian) of northern Greenland (Laurentia)

Gff, 2021
John S Peel
exaly