. Bulletin of the Geological Society of America. Geology. Figure 2.—Six-faced Tetrahedron (Heratetra- hedron). showing the next approximation toward the sphere, with the depressions representing oceans shaded on the assumption that land and water are equal. Figure 3.—Six-faced Tetrahedron with rounded Feices. The shading represents oceans equal to the lands. If the top be revolved, it would be an over-regular model of the rotating earth. The three equidistant shoulders of the top would be the three continents, Eur-Africa, Asia-Australia, and the Americas, triangular. Please note that these ima
. Bulletin of the Geological Society of America. Geology. Figure 2.—Six-faced Tetrahedron (Heratetra- hedron). showing the next approximation toward the sphere, with the depressions representing oceans shaded on the assumption that land and water are equal. Figure 3.—Six-faced Tetrahedron with rounded Feices. The shading represents oceans equal to the lands. If the top be revolved, it would be an over-regular model of the rotating earth. The three equidistant shoulders of the top would be the three continents, Eur-Africa, Asia-Australia, and the Americas, triangular. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York : The Society]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
