The New Encyclopaedia Britannica, Volume 23Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 156
... Permian freshwater variety abundance 14 : 97f Permian - Triassic evolution 18 : 696a phylogenic position and traits 14 : 383b riverine biological classification 15 : 888g Silurian vertebrate evolution 16 : 772e Upper Paleozoic evolution ...
... Permian freshwater variety abundance 14 : 97f Permian - Triassic evolution 18 : 696a phylogenic position and traits 14 : 383b riverine biological classification 15 : 888g Silurian vertebrate evolution 16 : 772e Upper Paleozoic evolution ...
Page 386
... Permian deposits in South Africa ( the Permian Period began 280,000,000 years ago and lasted 55,000,000 years ) . Galeops , representative of a group known as the dromasaurs , was a rela- tively small animal . The articulation of its ...
... Permian deposits in South Africa ( the Permian Period began 280,000,000 years ago and lasted 55,000,000 years ) . Galeops , representative of a group known as the dromasaurs , was a rela- tively small animal . The articulation of its ...
Page 765
... Permian Series of rock strata in the U.S. , defined on the basis of a prominent reef com- plex in the Guadalupe Mountains , Texas ( the Permian Period began about 280,000,000 years ago and lasted about 55,000,000 years ) . The ...
... Permian Series of rock strata in the U.S. , defined on the basis of a prominent reef com- plex in the Guadalupe Mountains , Texas ( the Permian Period began about 280,000,000 years ago and lasted about 55,000,000 years ) . The ...
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