دانلود کتاب Geological Society Special Publication, 001 The Phanerozoic Time-scale A Symposium

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Cover......Page 1
Errata......Page 2
Corrigenda......Page 3
Frontispiece......Page 4
Contents......Page 7
Abbreviations used......Page 9
Preface......Page 10
PART I: Introduction......Page 12
Foreword: Arthur Holmes......Page 13
The history of attempts to establish a quantitative time-scale......Page 22
A review of recent Phanerozoic time-scales......Page 38
Sedimentation rates in relation to the Phanerozoic time-scale......Page 46
The relationship between radiometric ages obtained from plutonic complexes and stratigraphical time......Page 52
The geological significance of radiometric age studies on volcanic and hypabyssal rocks......Page 64
Uranium-thorium-lead age-determinations with respect to the Phanerozoic time-scale......Page 79
The rubidium-strontium method......Page 93
Potassium-argon methods with special reference to basic igneous rocks......Page 106
Potassium-argon ages of sedimentary and pyroclastic rocks......Page 123
Potassium-argon decay constants and age tables......Page 132
Glauconite dates from the Upper Jurassic and Lower Cretaceous......Page 146
The age of the paroxysmal Variscan orogeny in England......Page 160
The Tertiary period......Page 177
The Cretaceous period......Page 190
The Jurassic period......Page 200
The Triassic period......Page 203
The Permian period......Page 206
The Carboniferous period......Page 216
The Devonian period......Page 228
The Silurian period......Page 232
The Ordovician period......Page 236
The Cambrian period......Page 250
General Discussion......Page 254
Summary of the Phanerozoic time-scale......Page 255
Introduction......Page 258
Items......Page 262
Items listed in order of radiometric age......Page 436
Alphabetical index to Items......Page 445
Advertisement......Page 451
Back......Page 457