The World's Two Greatest Petrified Forests
- 18 January 1929
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 69 (1777) , 60-63
- https://doi.org/10.1126/science.69.1777.60
Abstract
The "Cycad National Monument" forest of the southern Black Hills, and the newly discovered Araucarian forest of the Cerro Cuadrado, Patagonia, possibly of Triassic age, may be held as the 2 greatest of all petrified forests. One exemplifies the flowering gymnosperms, the other, the Araucaria-Pine relationship. At the Cerro Cuadrado occur silicified logs, stumps, branches with the Araucaria imbricata type of leaf-insertion, young seedlings, staminate cones, young seed cones, and many half- to about full-grown cones of 2 new genera, each with 2 species: PROARAUCARIA, includes a series of cones outwardly much like those of Araucaria cunninghamii, to which are referred P. mirabilis (Araucarites m. Spegaz.) and P. elongata; PARARAU-CARIA, intermediate between pines and araucarians, includes P. patagonica and P. elongata. Evidently araucarians should be classified under the Coniferales, the term Araucariales proving wholly redundant.This publication has 0 references indexed in Scilit: