GAF, together with the Department of Geology at the University of Witwatersrand, identified an impact structure in Brazil on Landsat MSS satellite imagery in the year 2000.
Download PDF: IN_Impact crater in Brazil: first identified on satellite imagery by GAF and partner - now officially confirmed
The circular structure, which has a diameter of approximately 10km, was identified near Gilbués , in the Province of Piauí in north-eastern Brazil. GAF was at that time involved as satellite remote sensing and geo-information consultant in the German- Brazilian WAVES research project, which focused on water availability and the vulnerability of ecosystems and society in the dry north-eastern provinces of Brazil. Recent fieldwork and the observation of shatter cones and other high-pressure deformation features have now confirmed the impact origin : the "Santa Marta" structure thus becomes Brazil's sixth officially recognised crater and is now listed as one of the 184 confirmed impact structures on Earth.