English Iridium anomaly Cited by user Achensee on 12 Aug 2023 The term iridium anomaly commonly refers to an unusual abundance of the chemical element iridium in a layer of rock strata at the Cretaceous–Paleogene (K–Pg) boundary.
English Chicxulub crater Cited by user Brandmeister on 05 Aug 2021 The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico.
English Massive Australian Precambrian/Cambrian Impact Structure Cited by user JeffreyYin333 on 01 Jun 2021 The Massive Australian Precambrian/Cambrian Impact Structure also known as MAPCIS is a proposed impact structure based upon arguments presented by Daniel P.