Paleomagnetic Constraints on the Fit of the Continents Around the Gulf of Mexico (Paleoceanographic Mapping Project Report No. 07-1285)
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Paleomagnetic results from the Heldenberg and Trenton carbonates have been shown to be remagnetizations of Late Carboniferous or Early Permian age, and these results differ in a systematic way from other North American poles of the same age. In this paper we argue that these well-determined remagnetized limestone results may be more valid than previously published poles because all of the latter are from red bed studies in which the nature and origin of the magnetization are uncertain. A modified Pangea A@ with North America positioned according to the limestone poles has a looser fit in the critical Gulf of Mexico region, and is therefore more in accord with reconstructions based on geological data only.