rift zone

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Rift basins of Triassic-Jurassic age that are associated with the breakup of the Pangean supercontinent contain an extraordinary record of the physical and biological conditions during this important period of Earth history. Rather than studying the rift basins as local features, ongoing work reveals that the Triassic-Jurassic rifts should be considered in a broader context that spans the entire proto-Atlantic realm. The rift province, collectively called the central Atlantic margin system, spans more than 45 degrees of paleolatitude and records over 35 million years of Earth history. The central Atlantic margin basins are of broad appeal to researchers interested in topics as diverse as extensional tectonics, the global magnetostratigraphic timescale, the evolution of early mammals, the appearance and diversification of dinosaurs, rift to drift crustal dynamics, astronomical forcing of climate, and models for the formation and occurrence of economic minerals and fossil fuel deposits. This extensive two volume work offers in-depth coverage of the North American components of the Central Atlantic Magmatic Province rifts by experts in the field.

In volume 2, leading researchers give thorough reviews and highlight recent advances in our understanding of the sedimentary rocks, stratigraphic architecture, early dinosaur and reptile footprints, and vertebrae fossils of the Central Atlantic Magmatic Province.

The companion volume, The Great Rift Valleys of Pangea in Eastern North America: Volume 1, Techtonics, Structure, and Volcanism, 0-231-11162-2, covers such topics as the structural geology, tectonics, and volcanism of the Central Atlantic Magmatic Province. It is edited by Peter M. LeTourneau and Paul E. Olsen and is also available from Columbia University Press.

Rift basins of Triassic-Jurassic age that are associated with the breakup of the Pangean supercontinent contain an extraordinary record of the physical and biological conditions during this important period of Earth history. Rather than studying the rift basins as local features, ongoing work reveals that the Triassic-Jurassic rifts should be considered in a broader context that spans the entire proto-Atlantic realm. The rift province, collectively called the central Atlantic margin system, spans more than 45 degrees of paleolatitude and records over 35 million years of Earth history. The central Atlantic margin basins are of broad appeal to researchers interested in topics as diverse as extensional tectonics, the global magnetostratigraphic timescale, the evolution of early mammals, the appearance and diversification of dinosaurs, rift to drift crustal dynamics, astronomical forcing of climate, and models for the formation and occurrence of economic minerals and fossil fuel deposits. This extensive two-volume work offers in-depth coverage of the North American components of the Central Atlantic Magmatic Province rifts by experts in the field.

In volume 1, leading researchers give thoroughly reviews and highlight recent advances in our understanding of the structural geology, tectonics, and volcanism of the Central Atlantic Magmatic Province.

The companion volume, The Great Rift Valleys of Pangea in Eastern North America: Volume 2, Sedimentology, Stratigraphy, and Paleontology, 0-231-12676-X, covers such topics as sedimentary rocks, stratigraphic architecture, early dinosaur and reptile footprints, and vertebrate fossils of the Central Atlantic Magmatic Province. It is edited by Peter M. LeTourneau and Paul E. Olsen and is also available from Columbia University Press.

Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This particular book contains chapters focused on Seismic zones of Canada, Seismic faults of Canada, and Seismic zones of British Columbia.
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Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This particular book is a collaboration focused on Geology of Quebec.
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Best review for Geology Of Quebec, including: Canadian Shield, Geology Of The Appalachians, Acadian Orogeny, Superior Craton, Saint Lawrence Rift System, Nastapoka … Quebec Seismic Zone, Huronian Supergroup

The earth’s crust and upper mantle have been continually modified by tectonic processes such as rifting, earthquake activity. In this dissertation, shear wave splitting and receiver function techniques were employed to study the extent of crustal and upper mantle modifications beneath the New Madrid Seismic Zone (NMSZ) and the Midcontinent Rift (MCR). Shear wave splitting analysis in the MCR reveals the presence of fossilised anisotropy along the rift axis. Beyond the 1.1 Ga MCR, the polarization angle (ϕ) observations are mostly parallel to the absolute plate motion direction. The most likely cause for the intriguing observation in the MCR is azimuthal anisotropy related to sub-vertical magmatic dykes along the strike of the rift. Receiver function results show an over-thickened crust (45km) with high Vp/Vs ratios beneath the MCR. In the NMSZ, anticipated rift-parallel fast directions associated with vertical magmatic dikes or along-rift flow, rift-orthogonal fast directions from small-scale convection, or reduction in splitting times as a result of vertical asthenospheric flow are not observed, suggesting that the NMSZ is a shallow feature. Shear-wave splitting parameters for the NMSZ suggest complex anisotropy which fit well with a double layer model with the lower layer fixed at APM direction. Receiver function results in the NMSZ show average crustal thickness of about 33.4+/-0.28 km for stations within the Mississippi embayment and variable crustal thicknesses in the Mazatazal Belt (30.2+/-0.14 to 53.1+/-0.29 km thick).
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Best review for Crustal modification by tectonic events and upper mantle anisotropy beneath the Midcontinent Rift and New Madrid Seismic Zone: Insights from receiver … studies and teleseismic shear wave splitting.