The model shown in Figure 2 yielded a Bouguer gravity difference of 9 ma, which was closest to the data obtained in the field. The fact that the model calculations always gave smaller Bouguer gravity differences than the observed 12 mg indicates that deeper structure, possibly in the basement, may cause part of the Bouguer gravity difference. Observed Bouguer anomalies. It is also possible that part of the observed gravity difference is due to regional gravity trends. This 3-mg difference, added to the 9 mg indicated by the model calculation, would result in agreement between the observed and calculated values.
Circles show theoretical anomaly, solid line shows observed anomaly.
Additional work is being undertaken to determine fully the structure beneath this particular playa and to compare the structure to that beneath other playas. Bull., v. 77, n. Texas Tech University Libraries .