Reports

Gravity and Magnetic Anomalies of the Sierra Madera, Texas, "Dome"

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Science  04 Oct 1963:
Vol. 142, Issue 3588, pp. 45-47
DOI: 10.1126/science.142.3588.45

Abstract

A geophysical traverse across the Sierra Madera "Dome" indicates a negative gravity anomaly of 1½ milligals over the zone of brecciation in the center and a residual positive anomaly of ½ milligal associated with a positive magnetic anomaly of 25 x 10-5 oersted to the southeast of the zone of brecciation. Areal surveys are needed before any definite conclusions can be drawn concerning the origin of Sierra Madera. However, gravity and magnetic data can be extremely valuable in establishing criteria for classifying terrestrial and lunar features according to meteoritic and cryptovolcanic origin.