18thcentury 2008c-086 569 575 archaeologyandnaturaldisasters asteroids bayof bibleandgeology bibleandscience bigbangtheory bronzeage campeche collisionswithearth comets congresses cosmology cretaceous-paleogeneboundary cryptoexplosionstructures cuvier deluge devonian disasters evolution extinction(biology) floods fossil geologicaltime geology georges history karoo karroo mammals massextinctions meteors mexico paleoecology paleohydrology paleolimnology paleontology permian permiangeologicperiod platetectonics qe881r917g1997 region religionandscience religiousaspects southafrica stratigraphic structural supernovae