Cretaceous - Wikipedia The Cretaceous (IPA: k r ɪ ˈ t eɪ ʃ ə s krih-TAY-shəss) [2] is a geological period that lasted from about 143 1 to 66 million years ago (Mya) It is the third and final period of the Mesozoic Era, as well as the longest At around 77 1 million years, it is the ninth and longest geological period of the entire Phanerozoic
Cretaceous Period | Definition, Climate, Dinosaurs, Map - Britannica Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era It began 145 million years ago and ended 66 million years ago and featured the extinction of the dinosaurs at the end of the period
Cretaceous Period—145. 0 to 66. 0 MYA - U. S. National Park Service The main contender for the Cretaceous mass extinction event is a huge asteroid striking Earth about 66 million years ago Eleven other impact structures are known from the Cretaceous, but none rival the terminal event of the Cretaceous
The Cretaceous Period: What was Earth like before dinosaurs went . . . The Cretaceous Period lasted for nearly 80 million years Discover what the climate was like in this geological period, where the continents were and what animals and plants lived on them Find out how an asteroid ended the age of dinosaurs
Cretaceous Period Facts and Information | National Geographic During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones Continents were on the move in the Cretaceous, busy remodeling the shape and tone of
The Cretaceous Period Facts Info For Kids Adults: The Ultimate Guide The Cretaceous Period facts for kids and adults Welcome to the ultimate guide to the Cretaceous Period! The Cretaceous Period was the third and final period of the Mesozoic Era During the Cretaceous Period dinosaurs continued to rule on land, while giant marine reptiles dominated the oceans
Life of the Cretaceous - University of California Museum of Paleontology The Cretaceous also saw the first radiation of the diatoms in the oceans (freshwater diatoms did not appear until the Miocene) The Cretaceous-Tertiary Extinction The most famous, if not the largest, of all mass extinctions marks the end of the Cretaceous Period, 65 million years ago As everyone knows, this was the great extinction in which
Cretaceous - New World Encyclopedia The Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period, from about 146 to 136 million years ago (Ma) to the beginning of the Paleocene epoch of the Paleogene period, or Tertiary sub-era (about 65 5 to 64 Ma)
Cretaceous Period - Dinosaurs, Plants, Marine Life | Britannica Cretaceous Period - Dinosaurs, Plants, Marine Life: Although the fossil record is irregular in quality and quantity for the Early Cretaceous, it is obvious that dinosaurs continued their lengthy dominance of the land