Anorthosite and Granite as Differentiates of a Diabase Sill on Pigeon Point, Minnesota

Abstract

Research Article| June 30, 1928 Anorthosite and Granite as Differentiates of a Diabase Sill on Pigeon Point, Minnesota FRANK F. GROUT FRANK F. GROUT Search for other works by this author on: GSW Google Scholar Author and Article Information FRANK F. GROUT Publisher: Geological Society of America Received: 27 Feb 1928 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1928 Geological Society of America GSA Bulletin (1928) 39 (2): 555–577. https://doi.org/10.1130/GSAB-39-555 Article history Received: 27 Feb 1928 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FRANK F. GROUT; Anorthosite and Granite as Differentiates of a Diabase Sill on Pigeon Point, Minnesota. GSA Bulletin 1928;; 39 (2): 555–577. doi: https://doi.org/10.1130/GSAB-39-555 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 Introduction and AcknowledgmentsAnorthosite and granite or syenite are associated with masses of gabbro at so many places that many petrologists believe that they have a common origin, or that they are differentiates from a common magma. The great sill at Pigeon Point, Minnesota, shows some features that indicate rather clearly the genetic relations of such rocks, and that may throw light on the general problem of rock differentiation. This sill seems to have been large enough to permit thorough differentiation, but not so large that the intrusion of the later phases of the magma obscured the relations of the phases already solidified. The outcrops are numerous, and there may be no other single geologic unit in which the relations of these common rock types are so clearly and suggestively exposed.The field-work was done for the Minnesota Geological Survey. The writer has had the advantage of frank discussion with . . . 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.