In a previous study (Van Alstine and Gillett, 1980), we explored the feasibility of using paleornagnetism to orient drill core from the Mesaverde Formation. That investigation involved paleomagnetic analysis of 173 plugs obtained from corehole CA-77-2 in the southern Piceance Creek Basin, Colorado. During that study, it became apparent that the presumably Cretaceous fossil magnetization was being distorted by a drilling-induced magnetization pointing almost directly down-hole. Moreover, the scatter of magnetization directions was greater than had been anticipated, limiting the precision of the paleomagnetic orienting technique. Since the core from CA-77-2 had not been conventionally oriented (using the multi-shot camera/compass system with a Monel collar), there was no check on the accuracy of the paleomagnetic orientation