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By James E. T. Channell, Dennis V. Kent, William Lowrie, Joseph G. Meert

Published through the yankee Geophysical Union as a part of the Geophysical Monograph Series.

To mark the seventieth birthday of Neil D. Opdyke, a Chapman convention entitled "Timescales ofthe inner Geomagnetic box" used to be held on the collage of Florida in Gainesville on March 9/11, 2003. This AGU Chapman convention used to be backed via the U.S. nationwide technological know-how starting place, college of Florida, Florida Museum of average historical past, and 2G corporations. 41 talks and twenty-three posters have been awarded in the course of the three-day assembly. This monograph comprises twenty-four of these papers, and is a balanced subset ofthe papers offered on the convention. The monograph is split into 3 components. half 1 offers with the geocentric axial dipole (GAD) speculation, continental reconstruction, and long term geomagnetic box habit. half 2 contains papers on magnetic polarity stratigraphy and the purchase of sedimentary magnetization. half three offers with secular version, paleointensity, and temporary geomagnetic box habit. those are all issues which were considerably impacted by way of Neil's clinical work.Content:

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J. , 151, 771-194, 2002. , Paleomagnetism of Atlantic, Tethys and Iapetus Oceans, Cambridge Univ. Press, 411 pp, 1993. Van der Voo, R. and R. B. French, Apparent polar wandering for the Atlantic bordering continents: Late Carboniferous to Eocene, Earth Sci. , 10, 99-119, 1974. Van der Voo, R. and T. H. Torsvik, Evidence Late Paleozoic and Mesozoic non-dopile fields provide an explanation for Pangea reconstruction problems, Earth. Planet. Sci. Lett, 187, 71-81, 2001. , Evaluation of some geotectonic hypotheses by pale­ omagnetism, Tectonophysics, 1, 3-71, 1964.

3. 280 and 250 Ma running mean poles (from Table 2). Note that A 's for two mean poles in (b) are not shown as they are based on only one or two entries. 95 In the last two decades, refinements in geochronological studies have changed the geological time scale calibration (Figure 3). y. older age, so that it is now placed at 292 Ma. More­ over, most recent discussions of the classical western European stage names such as Autunian and Rotliegendes now assign the lowermost parts of these stages to the latest Carboniferous (Gzhelian or Stephanian; see Fig.

There was good agreement within all five epochs, re-confirming, Argand's African Promontory (Adria) from Permian to the Cenozoic (Figure 6). Muttoni and colleagues then calculated the mean Early Permian paleopole for Europe, using results only from igneous rocks, matched it with that from Adria/Africa, and swung Gondwana east and north a minimal amount until its latitudes were conformable with those of Europe but without conti­ nental overlap. They obtained Figure 15a, essentially Pangea B of Figure 10, but with added speculations.

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