A gravity survey made some 30 years ago on the Island of Trinidad shows a negative anomaly of about 8 mgal over the Maruga Bouff mud volcano. An analysis of this anomaly is made, using an iterative three-dimensional (3-D) modeling technique. The resulting model shows low-density material superimposed on an underlying diapiric uplift. By comparison with other mud volcanoes which have been drilled, the model is considered reasonable.

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