Encyclopedia of Evolution.pdf - Online Reading Center

0 asteroids and comets
Large Impact Craters on Earth
Age Diameter
Name Location (million years) Period (km)
Vredefort South Africa 2023 Precambrian 300
Sudbury Canada 1850 Precambrian 250
Bedout Australia 250 Permian 200
Chicxulub Mexico 65 Cretaceous 170
Manicougan Canada 214 Triassic 100
Popigai Russia 35 Tertiary 100
Chesapeake Bay United States 36 Tertiary 90
Acraman Australia 590 Precambrian 90
Puchezh-Katunki Russia 175 Jurassic 80
Morokweng South Africa 145 Jurassic 70
Kara Russia 73 Cretaceous 65
Beaverhead United States 600 Precambrian 60
Tookoonooka Australia 128 Cretaceous 55
Charlevoix Canada 357 Carboniferous 54
Kara-kul Tajikistan 5 Tertiary 52
Siljan Sweden 368 Devonian 52
Damage to trees caused by the Tunguska event. On June 0, 0 , a huge fireball exploded in the sky over western Siberia, followed by an enormous
explosion. The explosion flattened almost , 00 square miles (more than ,000 square km) of forest. The explosion occurred near the town of Vanavara, in
the Podkamennaya Tunguska River valley. The explosion was probably caused by a meteorite about 0 feet (about 0 m) in diameter that broke up in the
atmosphere, although no major fragments or craters have been found. This photo was taken in 0. (Courtesy of Novosti Press Agency/Science Photo
Library/Photo Researchers, Inc.)