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Author: Martin Keller
Publisher: Geological Society of America
ISBN: 9780813723419
Category : Science
Languages : en
Pages : 144
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Book Description
Author: Martin Keller
Publisher: Geological Society of America
ISBN: 9780813723419
Category : Science
Languages : en
Pages : 144
Get Book Here
Book Description
Author: Martin Keller
Publisher: Geological Society of America
ISBN: 0813723418
Category : Science
Languages : en
Pages : 131
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Book Description
Author: Fernando Cañas
Publisher:
ISBN:
Category : Carbonate rocks
Languages : en
Pages : 32
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Book Description
Author: William Andrew Thomas
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 6
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Book Description
Author: Robert J. Pankhurst
Publisher: Geological Society of London
ISBN: 9781862390218
Category : Science
Languages : en
Pages : 394
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Book Description
This text brings together multidisciplinary research and review papers on the Lower Palaeozoic geology of the Sierras Pampeanas and the Precordillera of central west Argentina. It deals with the final stages of assembly of the supercontinent of Gondwana and its tectonic interaction with Laurentia (the North American continent of today).
Author: Víctor A. Ramos
Publisher: Geological Society of America
ISBN: 9780813723365
Category : Science
Languages : en
Pages : 290
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Book Description
Explores the tectonics interaction among the exotic terrians between Laurentia and Southwest Gondwana. The authors reveal data that sheds light on pre-Pangea connections between Laurentia and Southwest Gondwana. These data concern the presence of Ollenelus and associated fauna in the Precordillera of central Western South America; the common early Paleozoic paleomagnetic data, the presence of a large early Paleozoic carbo nate platform distinct from the Southwest Gondwanan clastic platforms associated with glacial deposits, and the exotic nature of the Grenville basement of this platform.
Author: T. Servais
Publisher: Geological Society of London Special Publications
ISBN: 1786205890
Category : Science
Languages : en
Pages : 618
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Book Description
The Ordovician was one of the longest of the geological periods, characterized by major magmatic and tectonic activity, an immense biodiversification, swings in climate and sea levels, and the first Phanerozoic mass extinction. ‘A Global Synthesis of the Ordovician System’ is presented in two volumes in The Geological Society, Special Publications. Whereas the first volume (SP532) concentrates on general aspects and a synthesis of the Ordovician geology of Europe, this volume (SP533) includes reviews of Ordovician successions of most other parts of the world. The classic successions of the Ordovician basins of North America are presented, as well as those of China where several of the Ordovician Global Boundary Stratotype Sections and Points are defined. The volume also includes syntheses of the Ordovician geology of Africa, South America, most regions of Asia from the Near to the Far East along with Central Asia, as well as Australia, New Zealand and Antarctica.
Author: Phoebe Ames Judge
Publisher:
ISBN:
Category :
Languages : en
Pages : 500
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Book Description
The Argentine Precordillera is a foreland fold-and-thrust-belt in western Argentina that overlies the central Chilean flat slab region of the subducting Nazca plate. The Precordillera has accommodated shortening over the past ~20 million years; over this time, the Nazca slab evolved from a relatively steep subduction angle to horizontal subduction. Because the shortening in the Precordillera spans the shallowing of the slab, changes in the deformation patterns can provide insight into the relationship between the down-doing slab and the over-riding plate at zones of shallow subduction. In this thesis, I present field-based structural data, cross sections of the Precordillera, and estimates of shortening magnitude and rates for the region in an effort to characterize the impact of a shallowing slab on deformation at the surface.! To calculate shortening magnitudes for cross sections that have rigorous uncertainty estimates, I developed an algorithm that propagates known input uncertainties through an area balancing calculation and yields both Gaussian and maximum uncertainty estimates. The area balancing method is complementary to the line-length balancing method and allows one to include known initial uncertainties, such as the uncertainty on stratigraphic thicknesses and the location of the decollement, neither of which are included in the "minimum shortening" estimates often cited in line-length balanced shortening calculations.! I constructed two cross sectional profiles through the Precordillera to determine shortening magnitude and rates since 20 Ma. Calculations for the profiles yield ~115 ± 44 (100) km of shortening in the Precordillera, where the uncertainty values are both Gaussian and maximum respectively. This shortening magnitude agrees with other published values of shortening for the Precordillera (72 - 136 km) determined via linelength balancing, and the variation in published values falls within the calculated uncertainty estimates. Variations in shortening rate throughout the Precordillera correlate temporally with changes in the geometry of the Nazca slab. Prior to the shallowing of the slab, the Precordillera accommodated 2 - 3% of the total plate convergence; after the slab began to shallow, shortening in the Precordillera accommodated 10 - 12% of the convergence rate.
Author: Carlos Alberto Cingolani
Publisher: Springer
ISBN: 3319501534
Category : Science
Languages : en
Pages : 280
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Book Description
Author:
Publisher: Academic Press
ISBN: 0128115505
Category : Science
Languages : en
Pages : 520
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Book Description
Stratigraphy and Timescales covers current research across a wide range of stratigraphic disciplines, providing information on recent developments for the geoscientific research community. This fully commissioned review publication aims to foster and convey progress in stratigraphy, including geochronology, magnetostratigraphy, lithostratigraphy, event-stratigraphy, isotope stratigraphy, astrochronology, climatostratigraphy, seismic stratigraphy, biostratigraphy, ice core chronology, cyclostratigraphy, palaeoceanography, sequence stratigraphy, and more. Contains contributions from leading authorities in the field Informs and updates on all the latest developments in the field Aims to foster and convey progress in stratigraphy, including geochronology, magnetostratigraphy, lithostratigraphy, event-stratigraphy, and more
