Structural analysis and stratigraphic problems of Precambrian rocks of the Picuris Range, New Mexico

Research Article| February 01, 1982 Structural analysis and stratigraphic problems of Precambrian rocks of the Picuris Range, New Mexico R. J. HOLCOMBE; R. J. HOLCOMBE 1Department of Geology and Mineralogy, University of Queensland, St. Lucia, Queensland 4067, Australia Search for other works by this author on: GSW Google Scholar J. F. CALLENDER J. F. CALLENDER 2Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Search for other works by this author on: GSW Google Scholar Author and Article Information R. J. HOLCOMBE 1Department of Geology and Mineralogy, University of Queensland, St. Lucia, Queensland 4067, Australia J. F. CALLENDER 2Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1982) 93 (2): 138–149. https://doi.org/10.1130/0016-7606(1982)93<138:SAASPO>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation R. J. HOLCOMBE, J. F. CALLENDER; Structural analysis and stratigraphic problems of Precambrian rocks of the Picuris Range, New Mexico. GSA Bulletin 1982;; 93 (2): 138–149. doi: https://doi.org/10.1130/0016-7606(1982)93<138:SAASPO>2.0.CO;2 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 Precambrian metasedimentary and amphibolite rocks of the Picuris Range have formerly been divided into the Ortega Group and the overlying Vadito Group. We present the results of a structural analysis of a small area straddling the contact between these two groups. Younging criteria and structural facing relationships show that the Vadito Group, as formerly defined, together with the Piedra Lumbre Formation of the Ortega Group, is an overturned sequence in fault contact with the remainder of the Ortega Group.The relative ages of the two groups are unknown, and their determination depends on interpretation of regional structure and structural history. We define four possible structural models, each of which would favor, but not require, reverse slip on the boundary fault, suggesting that the Vadito Group is probably in part or entirely older than the Ortega Group.Possible models for development of the observed geometry are: (1) rotational fault in major second generation folds; (2) a folded and faulted angular unconformity between the two groups; (3) major refolding of an earlier nappe-like structure; and (4) minor refolding and faulting of major first generation folds. 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.