Results 141 to 150 of about 802 (179)
Some of the next articles are maybe not open access.
Tightening the Siberian connection to western Laurentia
Geological Society of America Bulletin, 2003Newly available geological and geophysical data tighten the Proterozoic connection between the rifted margins of the northern Siberian craton and western Laurentia, and permit a Siberia-Laurentia-Australia troika, with northern Australia connected to the southern margin of the Siberian craton.
James W. Sears, Raymond A. Price
openaire +1 more source
Laurentia‐Kalahari Collision and the Assembly of Rodinia
The Journal of Geology, 2000Abstract The Llano Orogenic Belt along the present southern margin of Laurentia, regarded as continuation of the Grenvillian Orogen along the eastern Laurentian margin and exposed in basement uplifts in central and western Texas, records an ∼300‐m.yr. history of orogenesis culminating in arc‐continent and continent‐continent collision between ∼1150 and
Ian W. D. Dalziel +2 more
openaire +1 more source
The oldest cephalopods from east Laurentia
Journal of Paleontology, 2009Cambrian Cephalopods are presently reported only from tropical, carbonate platform successions that occur on a number of paleocontinents. Outside of West Gondwanan occurrences on the eastern Sino-Korean Platform in China, the record of Cambrian cephalopods is limited, and information on the early evolution and habitats of this molluscan class has grown
Ed Landing, Björn Kröger
openaire +1 more source
Precisely locating the Ordovician equator in Laurentia
Geology, 2012The Late Ordovician equatorial zone, like the zone today, had few hurricane-grade storms within 10o of the equator, as emphasized by the preservation of massive-bedded Thalassinoides ichnofacies in a trans-Laurentian belt more than 6000 km long, from the southwestern United States to North Greenland.
Jisuo, Jin +5 more
openaire +2 more sources
Rodinia palaeogeography: Laurentia as the geological ‘Key’
Geological Society, London, Special Publications, 2023Abstract Laurentia, core of the North American continent, is surrounded by Neoproterozoic to Cambrian rifted margins. This led to early suggestions that it was located within a Neoproterozoic supercontinent, Rodinia.
openaire +1 more source
Neoproterozoic Laurentia-Australia fit
Geology, 1993The proposed Vendian juxtaposition of western North America and eastern Australia can be tested by comparing sequences on each margin that developed during the major glacial epochs of the Neoproterozoic. The actual fitting of the margins, however, is more difficult, because both margins have been deformed since separation.
openaire +1 more source
Laurentia: Turning Points in the Evolution of a Continent
2023The North American continent has a rich record of the tectonic environments and processes that occur throughout much of Earth history. This Memoir focuses on seven “turning points” that had specific and lasting impacts on the evolution of Laurentia: (1) The Neoarchean, characterized by cratonization; (2) the Paleoproterozoic and the initial assembly of
openaire +1 more source
Wyoming on the run—Toward final Paleoproterozoic assembly of Laurentia
Geology, 2016Abstract Paleoproterozoic suture zones mark the formation of supercontinent Nuna and provide a record of North America’s assembly. Conspicuously young ages (ca. 1.715 Ga) associated with deformation in southeast Wyoming craton argue for a more protracted consolidation of Laurentia, long after peak metamorphism in the Trans-Hudson orogen.
Taylor Kilian +4 more
openaire +1 more source
THE LATE INVOLVEMENT OF LAURENTIA IN RODINIA ASSEMBLY
Geological Society of America Abstracts with Programs, 2023Felix Gervais +4 more
openaire +1 more source
Some Notes on Laurentia Adanson (Campanulaceae)
Kew Bulletin, 1979The generic name Laurentia Adanson (Fam. P1. 2: 134, 568 (1763)) must be rejected as superfluous under Art. 63 of the current (1978) Code. Adanson employs it simply as a substitute for Lobelia L. (Gen. P1. ed. 5: 401 (1754)) and cites 'Lobelia Lin.' as a synonym. The reasons for his doing so are made clear on p. 157 of the Famille des Plantes, vol.
openaire +1 more source