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Alto Allochthon

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Journal Article
Journal: GSA Bulletin
Published: 01 March 1988
GSA Bulletin (1988) 100 (3): 339-350.
...JANET L. HOPSON; ROBERT D. HATCHER, JR> Abstract The Alto allochthon is a postmetamorphic crystalline thrust sheet within the metamorphic core of the southern Appalachian orogen. The Toccoa Falls-Shorts Mill thrust fault separates structurally overlying migmatitic sillimanite- bearing Tallulah...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1988
GSA Bulletin (1988) 100 (5): 702-713.
... post metamorphic cooling through temperatures required for intracrystalline retention of argon. Hornblende within lower-grade portions of the Chauga-Walhalla complex and western portions of the Six-Mile nappe (Alto allochthon) records older plateau ages (322-362 m.y.). None of these release spectra...
Journal Article
Journal: Geology
Published: 01 November 1989
Geology (1989) 17 (11): 1063-1064.
Journal Article
Journal: Geosphere
Published: 15 April 2019
Geosphere (2019) 15 (3): 659-681.
... et al., 2017 ) and 1355 ± 250 km for the Himalayas ( Guillot et al., 2003 ). From this, we infer that suturing here was much gentler than expected for collision of a very large, young, warm (and thus buoyant) allochthonous terrane with a convergent margin. The conclusion of modest shortening...
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Series: GSA Memoirs
Published: 11 September 2017
DOI: 10.1130/2017.1213(13)
EISBN: 9780813782133
... Acadian-Neoacadian Alto (Six Mile) allochthon. New laser ablation– inductively coupled plasma–mass spectrometry (LA-ICP-MS) U-Pb zircon analyses from the metasedimentary mylonite component yield a detrital zircon suite dominated by 600 and 500 Ma zircons, and a second zircon population ranging from 2100...
FIGURES
Series: Reviews in Economic Geology
Published: 01 January 2018
DOI: 10.5382/rev.20.08
EISBN: 9781629491189
... Sarawak in which oceanic rocks were emplaced onto continental rocks during Lower Cretaceous to Eocene time. The older allochthonous sequence is the Serabang Formation ( Wilford, 1955 ). It consists of clastic sedimentary rocks with subordinate greenstone, ultramafic rocks, and limestone that crop out...
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Journal Article
Published: 15 July 2008
Canadian Journal of Earth Sciences (2008) 45 (6): 651-668.
...J. Brendan Murphy; Gabriel Gutiérrez-Alonso Abstract Northwestern Iberia preserves a stack of allochthons in which the vestiges of a suture zone generated during the Variscan orogeny by the late Paleozoic collision between Laurussia and Gondwana are exposed. Lower allochthons contain Ordovician...
FIGURES
Journal Article
Published: 01 September 2005
Bulletin de la Société Géologique de France (2005) 176 (5): 403-416.
... remains fragmentary and not established for all its tectonic units. The present paper places detailed constraints on the P-T evolution of the two deeper units of the Nevado-Filabride complex, namely the Ragua and the Calar Alto units in order to constrain their exhumation and the role of the km-thick Dos...
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Journal Article
Journal: Geosphere
Published: 26 May 2017
Geosphere (2017) 13 (4): 1234-1253.
.... Accordingly, for many proposed examples, basic kinematic problems like slip direction, dip angle while active, and magnitude of offset are keenly debated. A well-known example is the Miocene Mormon Peak detachment and overlying Mormon Peak allochthon of southern Nevada (USA), whose origin and evolution have...
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Series: AAPG Memoir
Published: 01 January 2003
DOI: 10.1306/M79877C37
EISBN: 9781629810546
... of northwestern South America in the middle–late Proterozoic, in the middle Paleozoic, and finally during the Mesozoic-Cenozoic Northern Andean orogeny. Middle Cretaceous through Miocene time slices illustrate how, beginning in the Aptian, the sequential dextral-oblique accretion of the allochthonous oceanic WTR...
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... margin. We herein establish detailed correlations between deposits of the shelf and the flanking basins, which we then use to reconstruct the depositional history, paleogeography, and deformational history, including Early Permian emplacement of the regionally significant Last Chance allochthon...
Series: SEPM Special Publication
Published: 01 January 2014
DOI: 10.2110/sepmsp.105.09
EISBN: 9781565763241
... crinoidal-fusulinid packstones, burrowed dark mudstones, and productid brachiopod wackestones and have interbedded allochthonous tongues of forereef grainflows, turbidites, and lithoclastic-skeletal packstone debris flows. More distal slope-to-basin facies are composed of autochthonous dark cherty...
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Journal Article
Published: 01 June 2009
Italian Journal of Geosciences (2009) 128 (2): 381-394.
... Apennine fold-and-thrust system to the Apulian Chain buried below the allochthonous Units of the Southern Apennines. Seismic line interpretation allowed us to reconstruct the three-dimensional pattern of the Apulian thrusts, oriented N-S, NNW-SSE and E-W, that are parallel to normal faults related...
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Journal Article
Journal: Geosphere
Published: 01 December 2014
Geosphere (2014) 10 (6): 1061-1075.
... released. Sediment bypassing, typically of the deeper biofacies, and full-canyon flushing, were also evident. Identifying and interpreting the distribution of allochthonous biological sediment constituents in marine deposits is a powerful tool in the investigation of sediment transport that can be applied...
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Journal Article
Published: 01 November 2008
Bulletin de la Société Géologique de France (2008) 179 (6): 569-581.
...; and (ii) several single-event mass-mortality horizons associated with dacitic pyroclastic flows responsible for the preservation of high-diverse allochthonous coquinas. Our knowledge of the biodiversity patterns achieved by the benthic communities preserved in the poorly fossiliferous, siliciclastic...
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Journal Article
Journal: PALAIOS
Published: 01 December 2008
PALAIOS (2008) 23 (12): 778-795.
...-sinuosity channels and crevasse-splay deposits; (2) A(Sm/Fm), autochthonous carbonized roots or root impressions of herbaceous plants in crevasse-splay and levee deposits; (3) B(Fsm/Fm), autochthonous root halos of herbaceous plants associated with levee deposits; (4) EI(St), allochthonous silicified tree...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2433(15)
.... Metamorphism generally achieved amphibolite facies, although in the west (Chauga belt), metamorphism is of upper green-schist facies ( Butler, 1991 ). The structure of the Inner Piedmont is dominated by large recumbent folds and nappes (e.g., Alto allochthon, Six Mile thrust sheet; Hopson and Hatcher, 1988...
Journal Article
Journal: Geology
Published: 01 November 2006
Geology (2006) 34 (11): 981-984.
...-Filábride) complex in the Internal Betics has a fundamentally different and younger metamorphic and tectonic history than the overlying allochthons. The Nevado-Filábride Complex was undergoing prograde high-pressure metamorphism at 18 Ma and later, after the overlying Alpujárride allochthon had been...
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Image
Eastern portion of the CROP 11 seismic profile ( a ), relative line drawing...
Published: 01 June 2009
foredeep deposists (early Pliocene); 4) Molise allochthonous Units and related thrust-top basins (Oligocene-lower Pliocene); 5) Siliciclastic deposits of the peri-Adritic basin (Late Pliocene-Pleistocene). Porzione orientale del profilo sismico CROP 11 (a) , relativo line drawing (b) e line drawing di
Image
Eastern portion of the CROP 11 seismic profile ( a ), relative line drawing...
Published: 01 June 2009
foredeep deposists (early Pliocene); 4) Molise allochthonous Units and related thrust-top basins (Oligocene-lower Pliocene); 5) Siliciclastic deposits of the peri-Adritic basin (Late Pliocene-Pleistocene). Porzione orientale del profilo sismico CROP 11 (a) , relativo line drawing (b) e line drawing di