Large Sedimentary Basins Created During Geological Time Suite of Impacts with Asteroids or Meteorites

Impact cratering determined by collisions with meteorites and asteroids is considered one of the main natural processes in the Solar System, modifying the planets and their satellites surface during Time. The Earth includes in its impact record a small number of such events due to active plate tectonics, sedimentation and volcanism, these geological processes destroying and burying their impact geomorphological signatures. To enlarge the Earth’s impacts database new concepts and research methods are necessary, as well as re-interpretation of old geological and geophysical models. Geomorphological, Ge-ological and Geophysical (3G) signatures in concealed impacted areas are discussed in this paper, the first offering the target characteristics, while the other ones giving means for detecting their unseen remnants. The 3G signatures have been applied to the Tran-sylvanian Depression, a fascinating geological structure, with difficulties in explaining the direct overlapping of regionally developed thick tuff and thick salt layers, and un-decided interpretation of the regional magnetic anomaly. Large and deep sedimentary basins, such as the Precaspian, Alexandria and Transylvanian depressions, are inter-preted to have started as impacted areas during the Permian or the Lower Neogene. Geophysical and geological existing information have been reinterpreted, offering a new way in understanding deeply located geological structures.