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Front MatterSource: Philosophical Transactions of the Royal Society of London. Series A, Mathematical andPhysical Sciences, Vol. 306, No. 1492, The Earth's Core: Its Structure, Evolution and MagneticField (Aug. 20, 1982), pp. 1-3Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/37176 .
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VOLUME ;:306 PAGES 1289 NUMBERS 1492
-20'August 1982
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A; DISCSSION:ORGANIZED kAND EDITED IlY
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PROCEEDINGS AND PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY
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PhIl. Trans. R. Soc. Lond. A, volume 306 Frontispiece
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Phil. Trans. R. Soc. Lond. A 306, 1-289 (1982) [ 1 ] Printed in Great Britain
THE EARTH'S CORE: ITS STRUCTURE, EVOLUTION AND MAGNETIC FIELD
A DISCUSSION ORGANIZED AND EDITED BY
S. K. RUNCORN, F.R.S., K. M. CREER AND J. A. JACOBS
(Discussion held 27 and 28 January 1982 - Typescripts received 15 March 1982)
[Frontispiece]
CONTENTS PAGE
S. R. C. MALIN
Sesquicentenary of Gauss's first measurement of the absolute value of magnetic intensity 5
J. A. JACOBS Introductory remarks 9
THE CONSTITUTION OF THE CORE B. A. BOLT
The constitution of the core: seismological evidence 11
0. L. ANDERSON
The Earth's core and the phase diagram of iron 21
T. J. AHRENS Constraints on core composition from shock-wave data 37
C. J. ALLEGRE, B. DUPRE' AND 0. BREVART
Chemical aspects of the formation of the core 49
R. A. W. HADDON
Evidence for inhb mogeneities near the core-mantle boundary 61 Discussion: R. H1DE, F.R.S., M. F. OSMASTON 69
THE GEOMAGNETIC FIELD: SECULAR VARIATION AND REVERSALS
D. R. BARRACLOUGH
Historical observations of the geomagnetic field 71
MARY KOVACHEVA
Archaeomagnetic investigations of geomagnetic secular variations 79 Discussion: R. HIDE, F.R.S. 85
K. M. CREER AND P. TUCHOLKA
Secular variation as recorded in lake sediments: a discussion of North American and European results 87
Vol. 306. A 1492 I [Published 20 August 1982
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2 CONTENTS
PAGE R. THOMPSON
A comparison of geomagnetic secular variation as recorded by historical, archaeomagnetic and palaeomagnetic measurements 103
B. M. CLEMENT, D. V. KENT AND N. D. OPDYKE
Brunhes-Matuyama polarity transition in three deep-sea sediment cores 113
J. C. LIDDICOAT Gauss-Matuyama polarity transition 121
W. LOWRIE A revised magnetic polarity timescale for the Cretaceous and Cainozoic 129
J. E. T. CHANNELL, J. G. OGG AND W. LOWRIE Geomagnetic polarity in the early Cretaceous and Jurassic 137
K. A. HOFFMAN The testing of geomagnetic reversal models: recent developments 147
Discussion: R. HIDE, F.R.S. 158
K. L. VEROSUB
Geomagnetic excursions: a critical assessment of the evidence as recorded in sediments of the Brunhes Epoch 161
F. HELLER AND N.. PETERSEN
The Laschamp excursion 169 Discussion: C. LAJ 177
C. G. A. HARRISON AND H. Mt. CARLE
Modelling the core magnetic field of the Earth 179 Discussion: K. M. CREER 190
R. E. DODSON Normal vector models of the geomagnetic secular variation during late Tertiary time 193
Discussion: F. J. LOWES 201
C. E. BARTON
Spectral analysis of palaeomagnetic time series and the geomagnetic spectrum 203 Discussion: F. J. LOWES 209
M. 0. MCWILLIAMS, R. T. HOLCOMB AND D. E. CHAMPION Geomagnetic secular variation from 14C-dated lava flows on Hawaii and the
question of the Pacific non-dipole low 211
Discussion: R. HIDE, F.R.S. 221
GEOPHYSICAL INTERPRETATIONS R. HIDE, F.R.S.
On the role of rotation in the generation of magnetic fields by fluid motions 223
KATHRYN A. WHALER
Geomagnetic secular variation and fluid motion at the core surface 235
Discussion: F. J. LowEs 246
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CONTENTS 3
PAGE
D. GUBBINS
Finding core motions from magnetic observations 247
Discussion: R. HIDE, F.R.S., M. F. OSMASTON 254
F. KRAUSE
Progress in dynamo theory: kinematic and dynamic models 255
S. K. RUNCORN, F.R.S. The role of the core in irregular fluctuations of the Earth's rotation and the excitation of the Chandler wobble 261
Discussion: K. LAMBECK, D. E. WINCH 268
T. MADDEN AND J.-L. LE MOUEL
The recent secular variation and the motions at the core surface 271
S. R. C. MALIN AND R. HIDE, F.R.S. Bumps on the core-mantle boundary: geomagnetic and gravitational evidence revisited 281
Discussion: K. LAMBECK, H. K. MOFFATT 987
I1-2
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