Remote sensing analysis of unnamed crater in Eastern Australia
Keywords:Australia, Winton, impact crater, geology, geophysics, remote sensing, bouguer
Remote sensing (RS) can certainly provide deep insights about detecting the terrestrial structure of unknown origin. In this paper, we also detected impact crater of unknown origin in northeast Australia by RS techniques, specifically to enhance the credibility of scientific database on the possible impact craters in the continent of Australia. Following the RS procedures, a circular-shaped unnamed crater, hereafter the Winton crater, was detected with a diameter of approximately 130-km. Furthermore, the topographical parameter was obtained from RS data, which showed that the area, depth and volume of the crater are ~100-m2, ~130-m and ~99.8-m3, respectively. The geological data revealed that inside the crater, the outcrops are mainly consisted of sedimentary and low grade metamorphic rock, specifically included the mixed sediments and conglomerates, limestone and siltstone of the Craterous period. However, the exterior of the circular shaped in the southern part is consisted of unconsolidated deposits of the Tertiary period. The positive value of gravity anomaly for the major part of the crater is 3000 mGal and Bouguer gravity onshore grid has an anomaly of 900 mGal over the impact crater. It showed that the Winton crater could not be the due to any volcanic or karstic processes. On the other hand, a detailed field and petrology investigation should need to distinguish the origin of the crater of old and fossil travertine or an impact crater.
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