Coastal and Baja California paleomagnetism reconsidered

摘要: Systematic reappraisal of paleomagnetic data from upper Mesozoic and lower Cenozoic sedimentary rocks igneous late age in coastal Baja California indicates that pluton tilt shallowing directions by compaction resolve observed discordances with the North American apparent polar wander (APW) path when best available reference paleopoles are used for comparison. The hypothesis major tectonic transport excess distances inherent current models evolution San Andreas transform system is unnecessary conflict geologic observations. Fresh insights derived recent sets improved analysis include following. (1) limited recording primary remanence Upper Jurassic Lower Cretaceous volcanic concordant APW path. (2) Peninsular Ranges batholith inferred paleobarometric eliminates its declination discordance reduces inclination to a level where ovals confidence expected overlap. (3) Key Paleogene red-bed successions on Salinian block have yielded paleolatitudes. (4) different paleolatitudes marine strata lie within range can be attributed basis both experimental information observations elsewhere. (5) Turbidites more susceptible than shelf deltaic strata. (6) uniform rotation previously peninsular not supported full array now multiple localities. (7) Basement ties peninsula continental interior preclude any much slip.