About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 68. Chapters: Cenozoic, KT boundary, Mesozoic, Paleozoic, Pleistocene, Cretaceous-Tertiary extinction event, Quaternary, Eocene, Crinoid, Laurasia, Tethys Ocean, Microbial mat, Chicxulub crater, K-T boundary, Silverpit crater, Gondwana, Ottawa-Bonnechere Graben, Paleocene, Geology of Wales, Shiva crater, European Land Mammal Mega Zone, Geological structure of Great Britain, Avalonia, Boltysh crater, Yukon-Tanana Terrane, Cimmerian Plate, Paleo-Tethys Ocean, Farallon Plate, Alcoota, Canadian Epoch, Alpine orogeny, Kula Plate, North American Land Mammal Age, Panthalassa, Kazakhstania, Euramerica, South American Land Mammal Age, Baltica, Helicotomidae, Cassinian, Mesozoic Marine Revolution, Kaikoura Orogeny, Permo-Carboniferous, Chilenia, Salisbury Embayment, Baltic Plate, Holopeidae, Insular Plate, Moa Plate, Chiloe Block, Slide Mountain Terrane, Farallon Trench, Charcot Plate, Lhasa Plate, Cantabria. Excerpt: The Cretaceous-Tertiary extinction event, which occurred approximately 65.5 million years ago (Ma) at the end of the Maastrichtian, was a large-scale mass extinction of animal and plant species in a geologically short period of time. Widely known as the K-T extinction event, it is associated with a geological signature known as the K-T boundary, usually a thin band of sedimentation found in various parts of the world. K is the traditional abbreviation for the Cretaceous Period derived from the German name Kreidezeit, and T is the abbreviation for the Tertiary Period (a historical term for the period of time now covered by the Paleogene and Neogene periods). The event marks the end of the Mesozoic Era and the beginning of the Cenozoic Era. With "Tertiary" being discouraged as a formal time or rock unit by the International Commission on Stratigraphy, the K-T event is now called the Cretaceous-Paleogene (or K-Pg) extinction eve...
