11. Moilanen, J . and the Expert Database on Earth Impact Structures ( EDEIS ). 12. Later an amateur geologist Jarmo Moilanen discovered also shatter cones within the impact structure . 13. Two impact structures have been identified in the basin-Mount Toondina crater and Tookoonooka crater. 14. Its center is located near the town of largest confirmed impact structures on Earth. 15. John Weber and his associates presented fission track dating of apatite from this impact structure . 16. The impact structure is buried and is not visible. 17. Moilanen, J ., 2009 and the Expert Database on Earth Impact Structures ( EDEIS ). 18. The two other large impact structures on the planet are the Orientale basins on the Moon. 19. The age of the impact structure is somewhat contentious, in the absence of any radiometric dating. 20. Azuara is still listed as a confirmed impact structure in other data bases, e . g.
