Directions of magnetization in the Triassic Chugwater Formation can be divided into two distinct groups nearly opposed to each other. These "normal" and "reversed" groups of magnetic directions have been used to correlate units within the Chugwater Formation in west-central Wyoming. Twenty-four possible magnetic "events" were noted; twelve of these appear to be caused by a reversal of the earth's magnetic field. Insufficient data are available to determine whether the other magnetic events record a reversal of the earth's magnetic field.

Local correlation between two sections 4.5 miles apart (northeast Thermopolis and south Thermopolis) indicates that the paleomagnetic correlation is not as precise as the lithologic correlation, but the two types of correlation do not conflict. Both types of correlation lines are approximately local "time-lines."

Regional correlation between stratigraphic sections along a cross section of 216 miles indicates that the paleomagnetic correlation lines are approximately "time-lines." Other results of the paleomagnetic correlation are: (1) lateral or vertical changes in rock type do not affect the magnetic directions within some intervals; (2) magnetic events differ in duration; (3) the number of magnetic events that can be correlated decreases as the distance between sections increases; and (4) the intensity of magnetization appears to be the same in normally and reversely magnetized samples.

The intensity of magnetization in the samples from the Chugwater Formation generally varies according to rock type. From least intense to most intense, this variation is: (1) drab siltstone and sandstone; (2) red, very fine-grained sandstone; and (3) red siltstone and poorly sorted siltstone. No significant relation between intensity of magnetization and bedding type has been noted.