CRATERS GEOLOGY & PLANETARY SCIENCE A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site astrobleme Manicougan Crater, Quebec, Canada An eroded impact crater on Earth of which about 150 are known. Among the largest are the 200-km-wide Sudbury Crater in Ontario, Canada, and the 180-km-wide Chicxulub Crater which extends into the Gulf of Mexico. While some astroblemes are almost 2 billion years old, about 60% were formed within the past 200 million years. Related category    • CRATERS    • GEOLOGY AND PLANETARY SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP