Till

A Glacial Process Sedimentology

Inbunden, Engelska, 2017

AvDavid J. A. Evans,David J. a. Evans,David J A Evans

1 429 kr

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Provides the first comprehensive review of the current state of the science on tillsIt is critical that glacial scientists continue to refine their interpretations of ancient archives of subglacial processes, specifically those represented by tills and associated deposits, as they form the most widespread and accessible record of processes at the ice-bed interface. Unfortunately, despite a long history of investigation and a lexicon of process-based nomenclature, glacial sedimentologists have yet to reach a consensus on diagnostic criteria for identifying till genesis in the geological record. What should be called till? Based on the author’s extensive field research, as well as the latest literature on the subject, this book attempts to provide a definitive answer to that question. It critically reviews the global till literature and experimental and laboratory-based assessments of subglacial processes, as well as the theoretical constructs that have emerged from process sedimentology over the past century. Drawing on a wide range of knowledge bases, David Evans develops a more precise, contemporary till nomenclature and new investigatory strategies for understanding a critical aspect of glacial process sedimentology. Provides an in-depth discussion of subglacial sedimentary processes, with an emphasis on the origins of till matrix and terminal grade and the latest observations on till evolutionDescribes contemporary laboratory and modelling experiments on till evolution and techniques for measuring strain signatures in glacial depositsDevelops an updated till nomenclature based on an array of knowledge bases and describes new strategies for field description and analysis of glacial diamictonsWritten by an internationally recognised expert in the field, this book represents an important step forward in the modern understanding of glacial process sedimentology. As such, Till: A Glacial Process Sedimentology is an indispensable resource for advanced undergraduates and researchers in sedimentology, glacier science and related areas.

Produktinformation

Utgivningsdatum2017-11-24
Mått196 x 249 x 23 mm
Vikt1 043 g
FormatInbunden
SpråkEngelska
SerieCryosphere Science Series
Antal sidor400
FörlagJohn Wiley and Sons Ltd
ISBN9781118652596

Tillhör följande kategorier

Geovetenskap inom Naturvetenskap och teknik

Acknowledgements vii1 Glacigenic Diamictons – A Rationale for Study 12 A Brief History of Till Research and Developing Nomenclature 73 Till – When is it an Inappropriate Term? 304 Glacigenic Diamictons: A Strategy for Field Description and Analysis 354.1 Diamicton 354.2 (Glacigenic) Melange 374.3 Physics of Material Behaviour 404.4 Typical Structures 444.5 Clast Macrofabrics and Microfabrics 445 Subglacial Sedimentary Processes: Origins of Till Matrix and Terminal Grade 546 Subglacial Sedimentary Processes:Modern Observations on Till Evolution 596.1 Lodgement, Lee-Side Cavity Filling and Ploughing 596.2 Deformation 696.3 Soft-Bed Sliding (Ice Keel Ploughing), Meltwater Drainage and Ice–Bed Decoupling 776.4 Melt-Out 836.5 Glacitectonite Production, Rafting and Cannibalisation 867 Subglacial Sedimentary Processes: Laboratory and Modelling Experiments on Till Evolution 988 Measuring Strain Signatures in Glacial Deposits 1049 The Geological Record: Products of Lodgement, Cavity Fill and the Boulder Pavement Problem 1329.1 Introduction – Repositioning Field Studies and Experimental Reductionism 1329.2 Lodgement 1349.3 Clast (Boulder) Pavements 1399.4 Lee-side Cavity Fills 14210 The Geological Record: Deforming Bed Deposits 14511 The Geological Record: Sliding Bed Deposits 17912 The Geological Record: Impacts of PressurisedWater (Clastic Dykes) 18813 The Geological Record: Melt-out Till 20214 The Geological Record: Glacitectonite 22215 Glacial Diamictons Unrelated to Subglacial Processes 25916 Till Spatial Mosaics, Temporal Variability and Architecture 29817 Concluding Remarks: The Case for a Simplified Nomenclature 333References 342Index 385