The Yellowstone National Park - historical and descriptive - illustrated with maps, views and portraits (1895) (14741613046)

Identifier: yellowstonenatio1897chit (find matches)

Title: The Yellowstone National Park : historical and descriptive : illustrated with maps, views and portraits

Year: 1895 (1890s)

Authors: Chittenden, Hiram Martin, 1858-1917

Subjects:

Publisher: Cincinnati : R. Clarke Co.

Contributing Library: Harold B. Lee Library

Digitizing Sponsor: Brigham Young University

Text Appearing Before Image:

und to occur in different planes orhorizons of growth, one above another, until thewhole series represents a thickness of many hundreds,and possibly thousands, of feet. Going back to thefirst of these growths, it is found to have been de-stroyed by an outpouring of volcanic material, whichpartially or wholly submerged it. After the flow hadceased, the ordinary atmospheric and aqueous agen-cies began work, eroding the surface in some placesand depositing the products of erosion in others,while vegetation rapidly covered the newly-formedsoil. A subsequent flow destroyed this secondgrowth and gave a new horizon, on which the sameprocess was repeated. This continued until therewere at least nine, and probably twelve, of these con-secutive growths. The lava flows in this particular section do notseem to have been characterized by great heat. Theywere composed of volcanic agglomerate, in whichthere was a large admixture of mud and water, with FOSSIL FORESTS OF THE YELLOWSTONE. yv^lf^Mfc 177

Text Appearing After Image:

Terry Engr. Co. U. S. Geological Survey of the Territories. Section of Amethyst Mountains. sufficient heat to destroy life, but not to char or con-sume its products. The percolation of siliceous watersgradually turned the arboreal vegetation into stone 178 THE YELLOWSTONE NATIONAL PARK. by the process of substitution, and thus preserved inthese silent monuments a record of the events whichonce transpired there. When the last of the erup-tions had ceased, there existed in this locality a vastdepth of volcanic ejectamenta, composed of many

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1895

Harold B. Lee Library

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public domain