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The basalts and overlying lower Miocene chalks from the Cocos Plate reference Site 495 are magnetically extremely stable and yield latitudes of 3.8° ± 2.3° for the basalts and 3.2° ± 2.3° for the sediments. Because the polarity of magnetization cannot be determined, the latitudes can be either north or south. Three Late Cretaceous and one Oligocene sample from Site 494 on the lower slope have inclinations that imply that these rocks formed near or slightly north of their present latitude. INTRODUCTION The objective of the paleomagnetic study of samples recovered on DSDP Leg 67 off Guatemala was to obtain information relevant to the motion of the Cocos Plate and possibly to aid in the interpretation of the depositional history of the sediments in a convergent margin. Because of disturbed cores or similar considerations that would destroy the paleomagnetic record, sampling was unsystematic and limited. The majority of samples (55) are from Site 495, the Cocos Plate reference site. The remaining samples are distributed as follows: 16 samples from Site 499 on the trench floor; 9 samples from Site 500 also on the trench floor but at the base of the landward slope; 4 samples from the deepest part of Site 494 on the trench lower slope (see Table 1 for a list of samples used in this study).

Some Paleomagnetic Results from Deep Sea Drilling Project Leg 67 off Guatemala