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Mesozoic era
(Encyclopedia) Mesozoic eraMesozoic eramĕzˌəzōˈĭk [key] [Gr.,=middle life], major division of geologic time (see Geologic Timescale, tablegeologic timescale, table) from 65 to 225 million years ago.…Paleocene epoch
(Encyclopedia) Paleocene epochPaleocene epochpāˈlēəsēnˌ [key], first epoch of the Tertiary period in the Cenozoic era of geologic time (see geologic timescale) between 60 to 66 million years ago. In…Day, Clarence Shepard
(Encyclopedia) Day, Clarence Shepard, 1874–1935, American essayist, b. New York City, grad. Yale, 1896. His biographical sketches of his parents, God and My Father (1932), Life with Father (1935),…continental drift
(Encyclopedia) CE5 Continental drift (arrows indicate the directions of motion of the landmasses) A. Proposed reconstruction of the supercontinent Pangaea indicating the major present landmasses B…Cenozoic era
(Encyclopedia) Cenozoic eraCenozoic erasēnəzōˈĭk, sĕn– [key], last major division of geologic time (see Geologic Timescale, tablegeologic timescale, table) lasting from 65 million years ago to the…ammonite
(Encyclopedia) ammoniteammoniteămˈənīt [key], one of a type of extinct marine cephalopod mollusk, related to the nautilus and resembling it in having an elaborately coiled and chambered shell. Unlike…Cretaceous period
(Encyclopedia) Cretaceous periodCretaceous periodkrĭtāˈshəs, third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from…mammal
(Encyclopedia) mammal, an animal of the highest class of vertebrates, the Mammalia. The female has mammary glands, which secrete milk for the nourishment of the young after birth. In the majority of…Are These Beasts Jurassic, Triassic, or Cretaceous?
Dinosaurs lived millions of years ago, many of whom were part of the Mesozoic Era. The Mesozoic Era is the second-to-last era of Earth's geological history and comprised of the Jurassic, Triassic,…Plesiosaurus
(Encyclopedia) PlesiosaurusPlesiosaurusplēˌsēəsôrˈəs [key], genus of extinct predatory marine reptiles that arose in the Triassic period of geologic time and continued into the Jurassic and…Trending
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