Alpine structures in northwestern Calabria, Italy

Abstract

Research Article| September 01, 1976 Alpine structures in northwestern Calabria, Italy A. CARRARA; A. CARRARA 1Consiglio Nazionale delle Ricerche-IRPI, 87030 Castiglione Scab, Cosenza, Italy Search for other works by this author on: GSW Google Scholar G. G. ZUFFA G. G. ZUFFA 1Consiglio Nazionale delle Ricerche-IRPI, 87030 Castiglione Scab, Cosenza, Italy Search for other works by this author on: GSW Google Scholar GSA Bulletin (1976) 87 (9): 1229–1246. https://doi.org/10.1130/0016-7606(1976)87<1229:ASINCI>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 A. CARRARA, G. G. ZUFFA; Alpine structures in northwestern Calabria, Italy. GSA Bulletin 1976;; 87 (9): 1229–1246. doi: https://doi.org/10.1130/0016-7606(1976)87<1229:ASINCI>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 The Tyrrhenian Coastal Chain of northwestern Calabria is underlain by five tectono-stratigraphic units that represent large thrust sheets originating in the Tyrrhenian area and emplaced in Calabria before late Miocene time. Rocks of these nappe structures were originally Mesozoic-Tertiary platform-type carbonates, Jurassic-Cretaceous oceanic crust, and segments of a Hercynian Paleozoic microcontinent.Calcareous-dolomitic, metavolcanic, and metasedimentary rocks of the three geometrically lowest units exhibit similar structural successions and comparable meta-morphic patterns. The first deformational event recognized in such terranes generated recumbent, isoclinal, intrafolial folds with an axial-surface schistosity or slaty cleavage virtually parallel to bedding or volcanic layering. This was accompanied by metamorphism in the blueschist and lower greenschist facies and was followed by a second main deformational phase, which formed tight, inclined to recumbent folds with various types of axial-plane crenulation cleavages. Deformation and metamorphism are interpreted to have occurred before nappe emplacement, whereas during overthrusting, previous linear features such as L2 lineations underwent reorientation toward parallelism, with the stretching direction generating a structural pattern that was radial in relation to the Calabrian arc.The uppermost tectono-stratigraphic units made of Hercynian gneissic terranes display early structures largely obliterated by Alpine cataclasis and retrograde metamorphism. Two minor deformational phases occurred throughout the nappe pile and predated the late Miocene postorogenic transgression. The Pliocene-Quaternary arching of this foldbelt was accompanied by widespread normal faulting, which determined the present outcrop pattern. 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.