S U M M A R Y Palaeomagnetic results from mainly Cretaceous rocks in Honduras delineate a distinctive apparent polar wander path (APWP) which is well suited for magnetostratigraphy. T h e A P W P is based o n palaeomagnetic data from palaeontologically dated units in the established stratigraphic column and three radiometrically dated intrusions. T h e ages and stratigraphic positions of sedimentary units whose stratigraphic assignments have been debated, can be inferred by comparing their palaeomagnetic pole postion with the known APWP. T h e results demonstrate the usefulness of magnetostratigraphy for resolving stratigraphic problems in the absence of fossils o r marker beds, and for areas of discontinuous exposures. For regional interpretations, the most important conclusion is that strata in Honduras that have been assigned t o the Todos Santos Formation were not deposited on the same tectonic plate as the Todos Santos Formation of Guatemala and southern Mexico. There is n o evidence that t h e Honduran 'Todos Santos' strata are depositionally related t o the true Todos Santos Formation. T h e name 'Todos Santos Formation' should be abandoned in Honduras and for the entire Chortis Block.
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