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Author: A.J. Rees
Publisher: Geological Society of London
ISBN: 1862396906
Category : Science
Languages : en
Pages : 148
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Book Description
This Memoir reviews, revises and interprets the biostratigraphy, lithostratigraphy, process sedimentology, palaeoenvironments and sequence stratigraphy of the classic Cambrian succession of SW Wales. This 1250m thick clastic sedimentary succession, of Terreneuvian to Furongian age, was deposited in environments ranging from alluvial fan to mid–outer shelf. Two lithostratigraphical groups are distinguished, each comprising six formations; where possible and appropriate, original and well-known names are retained in harmony with current usage. High-resolution sequence-stratigraphical techniques, constrained by biostratigraphical data whenever possible, allow the revised lithostratigraphy to be integrated with the western Avalonian chronostratigraphy developed in maritime Canada. A twofold subdivision is recognized. Megasequence 1 (sequences 3-7) spans the Terreneuvian, C2 and much of C3, with deposition occurring in an extensional rift-like regime on an epeirogenically active platform. Sequence 8 lies at the base of Megasequence 2, which extends from late C3 into the early Ordovician, and represents passive margin sedimentation.
Author: A.J. Rees
Publisher: Geological Society of London
ISBN: 1862396906
Category : Science
Languages : en
Pages : 148
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Book Description
This Memoir reviews, revises and interprets the biostratigraphy, lithostratigraphy, process sedimentology, palaeoenvironments and sequence stratigraphy of the classic Cambrian succession of SW Wales. This 1250m thick clastic sedimentary succession, of Terreneuvian to Furongian age, was deposited in environments ranging from alluvial fan to mid–outer shelf. Two lithostratigraphical groups are distinguished, each comprising six formations; where possible and appropriate, original and well-known names are retained in harmony with current usage. High-resolution sequence-stratigraphical techniques, constrained by biostratigraphical data whenever possible, allow the revised lithostratigraphy to be integrated with the western Avalonian chronostratigraphy developed in maritime Canada. A twofold subdivision is recognized. Megasequence 1 (sequences 3-7) spans the Terreneuvian, C2 and much of C3, with deposition occurring in an extensional rift-like regime on an epeirogenically active platform. Sequence 8 lies at the base of Megasequence 2, which extends from late C3 into the early Ordovician, and represents passive margin sedimentation.
Author: A. W. A. Rushton
Publisher: Geological Society of London
ISBN: 9781862393325
Category : Science
Languages : en
Pages : 68
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Book Description
This work reviews the correlation of the British and Irish Cambrian with the current (though incomplete) international standard for the Cambrian. Since the earlier edition of 1972, the basal and upper limits of the Cambrian system have been internationally agreed; so this account excludes Tremadocian rocks but includes some that were formerly considered Neoproterozoic. Half of the series and stage subdivisions are internationally agreed, but for the undefined divisions of the Cambrian the standard used here makes use of data from Avalonian successions. Since the first edition was published, almost every aspect of the Cambrian in the British Isles has been subjected to new study. Here, the plate tectonic make-up of the British Isles is reviewed, new radiometric ages and isotopic studies are summarized and the biostratigraphy is enhanced by the study of acritarchs, especially in the Irish successions.
Author: Alan W. Owen
Publisher: John Wiley & Sons
ISBN: 1119564239
Category : Science
Languages : en
Pages : 236
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Book Description
A volume from a monograph series featuring seven papers on trilobites with brief summaries This research volume is entitled Papers from the 6th International Conference on Trilobites and their Relatives. It's Volume 64 within the Fossils and Strata monograph series. The research compilation originated from a 2017 conference in Estonia. Seven papers on trilobites are included with summaries in the publication. The papers' topics cover trilobites from the Early Cambrian to the Late Devonian.
Author: Geological Society of London
Publisher: Geological Society of London
ISBN: 9781862391062
Category : Science
Languages : en
Pages : 216
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Book Description
Author: Karsten Piepjohn
Publisher: Geological Society of America
ISBN: 0813725410
Category : Science
Languages : en
Pages : 700
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Book Description
"To recognize the 25th anniversary of the Circum-Arctic Structural Events program, an effort organized by the Bundesanstalt fèur Geowissenschaften und Rohstoffe, this volume presents results from 18 major field expeditions involving 100+ geoscientists from a spectrum of disciplines. The volume focuses on the Proterozoic to Cenozoic tectonic evolution of the circum-Arctic region with correlations to adjacent orogens"--
Author: P. J. Cook
Publisher: Cambridge University Press
ISBN: 9780521619219
Category : Nature
Languages : en
Pages : 412
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Book Description
This book is an important contribution to the scientific understanding of phosphate deposits.
Author: D.A.T. Harper
Publisher: Geological Society of London Special Publications
ISBN: 1786205882
Category : Science
Languages : en
Pages : 514
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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. This first volume (SP532) charts the history of the Ordovician System and explores significant advances in our understanding of its biostratigraphy, including more precise calibration of its timescale with tephra chronology and regional alignments using astrochronology and cyclostratigraphy. Changes in the world’s oceans, their shifting currents and sea levels, the biogeography of their biotas and the ambient climate are described and discussed against a background of changing palaeogeography. This first volume also includes syntheses of the Ordovician geology for most European countries, including historical key areas, such as Great Britain, Baltoscandia and Bohemia. The second volume (SP533) provides synthetic aspects of the Ordovician geology of most other parts of the world.
Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 428
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Book Description
Author: Allison R. Palmer
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 38
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Book Description
Author: Isabel Rábano
Publisher: IGME
ISBN: 9788478407590
Category : Trilobites
Languages : en
Pages : 452
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Book Description
