File:The American journal of science (1913) (17966849739).jpg

Title: The American journal of science
Identifier: americanjourna4361913newh (find matches)
Year: 1880 (1880s)
Authors:
Subjects: Science
Publisher: New Haven : J. D. & E. S. Dana
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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262 G. R. Wieland—On Liassic Floras. such widely separated florae as those cited are doubtless further obscured by the fact that any given flora may be old or young for the region in which it occurs. A plant facies may be either juvenile or senile. Thus, as will be further cited below, it is strongly suspected that the plants of the Inferior Oolite of the Yorkshire Coast are old, are really a left-over Liassic Fig. 2.
Text Appearing After Image:
Fig. 2. Principal Triassic and Jurassic plant localities of Western Europe and the extra-arctic Americas. (Disks) denote early, and circles later Trias, solid black stars, early, and outline stars later Jura. The arrow points out the newly discovered Mixteca Alta horizons of Mexico, where 600 meters of Liassic strata have been measured and true Triassic plants are also believed to occur. These plant beds are widely extended over the region stretching westwardly from the valley of the Nochixtlan river in Oaxaca to Tlapa in the state of Guerrero (or further), and northwardly into southern Puebla. rather than a typical mid-Jurassic facies. For these plants may readily have been existent during the deposition of the

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