A 2D Forward Modeling of Gravity and Magnetic Data across Pilot Knob Volcano, Austin, Texas and Review of Previous Geological and Geophysical Research Mustafa SaribudakEnvironmental Geophysics Associatesega@pdq.netAustin, Texas SummaryI have become fascinated by the gravity and magnetic publication of Romberg and Barnes (1954) and the geologic work of Young et al. (1975 and 1982) and Barker and Young (1979) on Pilot Knob when I became aware of the Pilot Knob volcano during one of the Austin Geological Society field trips. The more I read these publications my interest grew more on Pilot Knob. One of the reasons was that both geophysical and geological work contained so much added, condensed information for me, and it was difficult to grasp and visualize the geological evolution of the Pilot Knob volcano clearly. Even though I recently published a geophysical paper on the subject, I still had many gray areas of my understanding of the evolution of the Pilot Knob volcano.In this research paper, I tried to fill this gap to a small extent by the 2D gravity and magnetic modeling of the well-known geological cross-section of Young et al, (1975, 1982) using the information available in the published gravity and magnetic paper of Romberg and Barnes (1954). To do that I had to briefly review the gravity and magnetic paper along with the geological work in this paper. I presented gravity and magnetic data in the forms of maps and/or profiles along with the latest geological maps and cross-sections so that the reader can get acquainted with them.Results of the 2D forward modeling of the published gravity and magnetic data with the iconic geological cross-section of the Pilot Knob volcano do not support the formation and evolution of the volcano with one large explosion crater.
