Igneous geology of the Spanish Peaks region, Colorado

Research Article| November 30, 1936 Igneous geology of the Spanish Peaks region, Colorado ADOLPH KNOPF ADOLPH KNOPF Search for other works by this author on: GSW Google Scholar Author and Article Information ADOLPH KNOPF Publisher: Geological Society of America Received: 15 May 1936 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 1936 Geological Society of America GSA Bulletin (1936) 47 (11): 1727–1784. https://doi.org/10.1130/GSAB-47-1727 Article history Received: 15 May 1936 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation ADOLPH KNOPF; Igneous geology of the Spanish Peaks region, Colorado. GSA Bulletin 1936;; 47 (11): 1727–1784. doi: https://doi.org/10.1130/GSAB-47-1727 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract INTRODUCTIONThe Spanish Peaks region in Colorado is famous for its remarkable system of radial dikes. These dikes and the accompanying sills were mapped by R. C. Hills in the Spanish Peaks and Walsenburg folios of the United States Geological Survey. The dikes extend out from the Spanish Peaks as a center to a distance of 25 miles or more. Some 300 dikes were mapped by Hills; but, inasmuch as he mapped only two-thirds of the area surrounding the Peaks, and, of necessity, only the thicker and more prominent dikes, the total number of dikes is probably not less than 500. Hills' work was done mainly for the purpose of determining the important coal resources of the area, and, in view of the inadequacy of the topographic maps (1:125,000), the mapping of the dikes stands as a remarkably fine achievement. According to Hills, the dikes were injected in the . . . This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.