Nature and science on the Pacific coast : a guide-book for scientific travelers in the West . on, the granitic intrusives are re-lated to the Idaho batholith rather than that of theSierra Nevada, while in central W^ashington a batho-lith of proved Miocene age is reported. Sills and dikes of serpentine were intruded alongthe axes of the present Coast Ranges. These mayhave been contemporaneous in part with the laterphases of the batholithic intrusions of the SierraNevada, which also include basic derivatives. Theintrusion of the Coast Range serpentines continued,however, into early Cretaceous ti
Nature and science on the Pacific coast : a guide-book for scientific travelers in the West . on, the granitic intrusives are re-lated to the Idaho batholith rather than that of theSierra Nevada, while in central W^ashington a batho-lith of proved Miocene age is reported. Sills and dikes of serpentine were intruded alongthe axes of the present Coast Ranges. These mayhave been contemporaneous in part with the laterphases of the batholithic intrusions of the SierraNevada, which also include basic derivatives. Theintrusion of the Coast Range serpentines continued,however, into early Cretaceous times. Prior to the intrusion of the last of the SierraNevada granites, the earth movements which broughtabout the Cordilleran revolution were well underway. The pre-Cretaceous sediments west of thebatholith were closely appressed into isoclinal axes of the folds are nearly vertical, occasion-ally overturned, and trend northwestward well intoOregon, where they swing to the northeast as if toround the point of the main batholith, and dis-appear under the cover of Tertiary lavas. 46. PLATE VILassen Peak in Eruption on June 14, Point From Which This PhotographWas Taken Is About Six Miles Northwestof Lassen Peak. The Foreground Is Nearly5000 Feet Above Sea Level. The Elevationof Lassen Peak Is 10,437 Feet Above SeaLevel. Photograph hy B. F. Loomis.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishersanfr, bookyear1915
