scholarly journals Supplemental Material: Raising the Resurrection plate from an unfolded-slab plate tectonic reconstruction of the northwestern North America since early Cenozoic time

2020 ◽  
Author(s):  
Spencer Fuston ◽  
Jonny Wu
Keyword(s):  
North America ◽  
Plate Tectonic ◽  
Tectonic Reconstruction ◽  
Data Tables ◽  
Plate Reconstruction ◽  
Northwestern North America ◽  
Early Cenozoic

Two fully kinematic plate reconstruction files with associated videos, two data tables, and six supporting figures.

scholarly journals Supplemental Material: Raising the Resurrection plate from an unfolded-slab plate tectonic reconstruction of the northwestern North America since early Cenozoic time

2020 ◽  
Author(s):  
Spencer Fuston ◽  
Jonny Wu
Keyword(s):  
North America ◽  
Plate Tectonic ◽  
Tectonic Reconstruction ◽  
Data Tables ◽  
Plate Reconstruction ◽  
Northwestern North America ◽  
Early Cenozoic

Two fully kinematic plate reconstruction files with associated videos, two data tables, and six supporting figures.

scholarly journals Supplemental Material: Raising the Resurrection plate from an unfolded-slab plate tectonic reconstruction of the northwestern North America since early Cenozoic time

2020 ◽  
Author(s):  
Spencer Fuston ◽  
Jonny Wu
Keyword(s):  
North America ◽  
Plate Tectonic ◽  
Tectonic Reconstruction ◽  
Data Tables ◽  
Plate Reconstruction ◽  
Northwestern North America ◽  
Early Cenozoic

Two fully kinematic plate reconstruction files with associated videos, two data tables, and six supporting figures.

scholarly journals Raising the Resurrection plate from an unfolded-slab plate tectonic reconstruction of northwestern North America since early Cenozoic time

2020 ◽  
Author(s):  
Spencer Fuston ◽  
Jonny Wu
Keyword(s):  
North America ◽  
Three Dimensions ◽  
Aleutian Islands ◽  
Plate Tectonic ◽  
Plate Model ◽  
Ridge Subduction ◽  
Ocean Ridges ◽  
Tectonic Reconstruction ◽  
Northwestern North America ◽  
Early Cenozoic

The configuration of mid-ocean ridges subducted below North America prior to Oligocene time is unconstrained by seafloor isochrons and has been primarily inferred from upper-plate geology, including near-trench magmatism. However, many tectonic models are permitted from these constraints. We present a fully kinematic, plate tectonic reconstruction of the NW Cordillera since 60 Ma built by structurally unfolding subducted slabs, imaged by mantle tomography, back to Earth’s surface. We map in three-dimensions the attached Alaska and Cascadia slabs, and a detached slab below western Yukon (Canada) at 400−600 km depth that we call the “Yukon Slab.” Our restoration of these lower plates within a global plate model indicates the Alaska slab accounts for Pacific-Kula subduction since ca. 60 Ma below the Aleutian Islands whereas the Cascadia slab accounts for Farallon subduction since at least ca. 75 Ma below southern California, USA. However, intermediate areas show two reconstruction gaps that persist until 40 Ma. We show that these reconstruction gaps correlate spatiotemporally to published NW Cordillera near-trench magmatism, even considering possible terrane translation. We attribute these gaps to thermal erosion related to ridge subduction and model mid-ocean ridges within these reconstruction gap mid-points. Our reconstructions show two coeval ridge-trench intersections that bound an additional “Resurrection”-like plate along the NW Cordillera prior to 40 Ma. In this model, the Yukon slab represents a thermally eroded remnant of the Resurrection plate. Our reconstructions support a “northern option” Farallon ridge geometry and allow up to ∼1200 km Chugach terrane translation since Paleocene time, providing a new “tomographic piercing point” for the Baja-British Columbia debate.

Supplemental material: Cenozoic to Recent plate configurations in the Pacific Basin: Ridge subduction and slab window magmatism in western North America

2006 ◽  
Author(s):  
J.K. Madsen ◽  
D.J. Thorkelson ◽  
R.M. Friedman ◽  
D.D. Marshall
Keyword(s):  
North America ◽  
Pacific Basin ◽  
Western North America ◽  
File Size ◽  
Tectonic Model ◽  
Ridge Subduction ◽  
The Pacific ◽  
Northwestern North America ◽  
Slab Window

Geosphere, February 2006, v. 2, p. 11-34, doi: 10.1130/GES00020.1. Movie 1 - Tectonic model for the Pacific Basin and northwestern North America from 53 Ma to 39 Ma. The file size is 1.3 MB.

scholarly journals Improving global paleogeography since the late Paleozoic using paleobiology

2017 ◽  
Vol 14 (23) ◽  
pp. 5425-5439 ◽  
Author(s):  
Wenchao Cao ◽  
Sabin Zahirovic ◽  
Nicolas Flament ◽  
Simon Williams ◽  
Jan Golonka ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
Plate Motion ◽  
Dynamic Topography ◽  
Map Projections ◽  
Motion Models ◽  
Tectonic Reconstruction ◽  
Isotope Record ◽  
America South ◽  
Regional Sea Level ◽  
Plate Reconstruction

Abstract. Paleogeographic reconstructions are important to understand Earth's tectonic evolution, past eustatic and regional sea level change, paleoclimate and ocean circulation, deep Earth resources and to constrain and interpret the dynamic topography predicted by mantle convection models. Global paleogeographic maps have been compiled and published, but they are generally presented as static maps with varying map projections, different time intervals represented by the maps and different plate motion models that underlie the paleogeographic reconstructions. This makes it difficult to convert the maps into a digital form and link them to alternative digital plate tectonic reconstructions. To address this limitation, we develop a workflow to restore global paleogeographic maps to their present-day coordinates and enable them to be linked to a different tectonic reconstruction. We use marine fossil collections from the Paleobiology Database to identify inconsistencies between their indicative paleoenvironments and published paleogeographic maps, and revise the locations of inferred paleo-coastlines that represent the estimated maximum transgression surfaces by resolving these inconsistencies. As a result, the consistency ratio between the paleogeography and the paleoenvironments indicated by the marine fossil collections is increased from an average of 75 % to nearly full consistency (100 %). The paleogeography in the main regions of North America, South America, Europe and Africa is significantly revised, especially in the Late Carboniferous, Middle Permian, Triassic, Jurassic, Late Cretaceous and most of the Cenozoic. The global flooded continental areas since the Early Devonian calculated from the revised paleogeography in this study are generally consistent with results derived from other paleoenvironment and paleo-lithofacies data and with the strontium isotope record in marine carbonates. We also estimate the terrestrial areal change over time associated with transferring reconstruction, filling gaps and modifying the paleogeographic geometries based on the paleobiology test. This indicates that the variation of the underlying plate reconstruction is the main factor that contributes to the terrestrial areal change, and the effect of revising paleogeographic geometries based on paleobiology is secondary.

Late Quaternary paleoenvironments of Northwestern North America: implications for inland versus coastal migration routes

2001 ◽  
Vol 20 (1-3) ◽  
pp. 301-314 ◽  
Author(s):  
Carole A.S Mandryk ◽  
Heiner Josenhans ◽  
Daryl W Fedje ◽  
Rolf W Mathewes
Keyword(s):  
North America ◽  
Late Quaternary ◽  
Migration Routes ◽  
Northwestern North America

Chromosome races in Rumex arcticus (Polygonaceae)

1972 ◽  
Vol 50 (2) ◽  
pp. 378-380
Author(s):  
Gerald A. Mulligan ◽  
Clarence Frankton
Keyword(s):  
North America ◽  
North American ◽  
Bering Sea ◽  
Kamchatka Peninsula ◽  
The Arctic ◽  
Chromosome Races ◽  
High Polyploid ◽  
Seward Peninsula ◽  
Northwestern North America ◽  
The Bering Sea

Rumex arcticus Trautv., a species found on the mainland of northwestern North America and in northeastern U.S.S.R., contains tetraploid (2n = 40), dodecaploid (2n = 120), and perhaps 2n = 160 and 2n = 200 chromosome races. Most North American plants are tetraploid and are larger in size and have more compound and contiguous inflorescences than typical R. arcticus. Typical plants of R. arcticus occur in the arctic U.S.S.R., St. Lawrence Island in the Bering Sea, and at the tip of the Seward Peninsula of Alaska, and they all have 120 or more somatic chromosomes. High polyploid plants of R. arcticus that resemble North American tetraploids in appearance apparently occur on the Kamchatka Peninsula. These have been called R. kamtshadalus Komarov or R. arcticus var. kamtshadalus (Kom.) Rech. f. by some authors.

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