Robuta

https://www.giss.nasa.gov/pubs/abs/st03700t.html NASA GISS: Stothers 1993: Impact cratering at geologic stage boundaries nasa giss impact cratering geologic stage boundaries https://ucrisportal.univie.ac.at/en/publications/catastrophes-extinctions-and-evolution-50-years-of-impact-crateri/ Catastrophes, Extinctions and Evolution: 50 years of Impact Cratering Studies. - University of... impact cratering catastrophes extinctions evolution https://ocw.mit.edu/courses/12-091-basics-of-impact-cratering-geological-geophysical-geochemical-environmental-studies-of-some-impact-craters-of-the-earth-january-iap-2008/ Basics of Impact Cratering & Geological, Geophysical, Geochemical, Environmental Studies of Some... There are now about 170 identified impact craters on the Earth, and this number is growing, ever since the well known discovery of Meteor Crater in 1920s.... impact cratering environmental studies basics geological geophysical