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cretaceous    音标拼音: [krɪt'eʃɪs]
a. 白垩的,白垩纪的
n. 白垩纪,白垩系

白垩的,白垩纪的白垩纪,白垩系

cretaceous
adj 1: abounding in chalk
2: of or relating to or denoting the third period of the
Mesozoic era
n 1: from 135 million to 63 million years ago; end of the age of
reptiles; appearance of modern insects and flowering plants
[synonym: {Cretaceous}, {Cretaceous period}]


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  • 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
  • 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
  • Cretaceous Period - Mesozoic, Paleogene, Cenozoic | Britannica
    Cretaceous Period - Mesozoic, Paleogene, Cenozoic: The rocks that were either deposited or formed during the Cretaceous Period make up the Cretaceous System The Cretaceous System is divided into two rock series, Lower and Upper, which correspond to units of time known as the Early Cretaceous Epoch (145 million to 100 5 million years ago) and
  • 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 - Climate, Extinction, Dinosaurs | Britannica
    Cretaceous Period - Climate, Extinction, Dinosaurs: In general, the climate of the Cretaceous Period was much warmer than at present, perhaps the warmest on a worldwide basis than at any other time during the Phanerozoic Eon
  • Cretaceous - Simple English Wikipedia, the free encyclopedia
    The Cretaceous period is the ninth and longest period in the Phanerozoic eon, lasting 80 million years from 145 to 65 million years ago (mya) It followed the Jurassic period, and is the third and last period of the Mesozoic era
  • 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
  • Cretaceous period: Animals, plants and extinction event
    The Cretaceous period lasted approximately 79 million years, and ended with a major extinction event about 66 million years ago





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