 | 1893 - 988 páginas
...(Observations on the Geology of the United States of America, Philadelphia, 1817). The author writes: "Necessity dictates the adoption of some system so...relative position of the different series of rocks." (Observations, etc., p. 28). The classification there set forth is as follows (in the order from below... | |
 | 1891 - 480 páginas
...6, 1800, pp. 411, 112. the nature and relative situation of the minerals in the United States, while they are certainly the most extensive of any field yet examined, may perhaps be found to bo the most correct elucidation of the general exactitude of that theory as respects the relative... | |
 | Charles Abiathar White - 1891 - 1028 páginas
...6, 1809, pp. 411, 412. the nature and relative situation of the minerals in the United States, while they are certainly the most extensive of any field yet examined, may perhaps be found to be the most correct elucidation of the general exactitude of that theory an respects the relative... | |
 | 1893 - 912 páginas
...(Observations on the Geology of the United States of America, Philadelphia, 1817). The author writes: "Necessity dictates the adoption of some system so...relative position of the different series of rocks." (Observations, etc., p. 28). The classification there set forth is as follows (in the order from below... | |
 | Henry Shaler Williams - 1895 - 436 páginas
...edition, 1833. f "Observations on the Geology of the United States of America," Philadelphia, 1817. nature and relative situation of the minerals in the...relative position of the different series of rocks." * The classification there set forth is as follows (in the order from below upwards) : Class I. Primitive... | |
 | 528 páginas
...agitation of the water, are to be found in high preservation on the south side of Lake Erie. SECTION II. Observations on the Geology of the United States of...the various substances, the following nomenclature wUl be used. CLASS I.— Primitive Rocks. SIENA BROWN. 1. Granite, 8. Porphyry, 2. Gneiss, 9. Sienite,... | |
 | 1893 - 910 páginas
...(Observations on the Geology of the United States of America, Philadelphia, 1817). The author writes: "Necessity dictates the adoption of some system so...relative position of the different series of rocks." (Observations, etc., p. 28). The classification there set forth is as follows (in the order from below... | |
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Necessity dictates the adoption of some system so far as respects the classification and arrangement of names. The Wernerian seems to be the most suitable, first, because it is the most perfect and extensive in its general outlines; and secondly, the... 