The Morais ophiolite complex, also known as Morais Massif (in Portuguese, Maciço de Morais), is located in the northeast of Portugal in the Bragança District, with its main core in the Macedo de Cavaleiros Municipality. Generally speaking the Morais ophiolite complex is a set of allochthonous units, which include a full range of ultramafic rocks.

Geological uniqueness

Its uniqueness lies in the fact that, within a radius of about 50 km, it's possible to see the geologic evidences of the continental collision between Laurussia and Gondwana with the consequent closure of the Rheic Ocean, to form the supercontinent of Pangaea in the Late Paleozoic (Variscan orogeny).[1]

This Geologic Complex presents three main units:[2]

See also

Notes

  1. ↑ Matte, Philippe (1991). "Accretionary history and crustal evolution of the Variscan belt in Western Europe". Tectonophysics. 196 (3–4): 309–337. doi:10.1016/0040-1951(91)90328-p. ISSN 0040-1951.
  2. ↑ Oliveira;Pereira;Machado, Daniel P. S.; Eurico; M. J. (2003). Pombais Unit, Lower Morais Ophiolite Complex, NE Portugal. Lisbon: Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia. pp. B64–B67.{{cite book}}: CS1 maint: multiple names: authors list (link)

Sources

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  • Ortiz, F. (Eds.), “Complejos Ofiolíticos en Iberoamérica – Guías de Exploración para Metales Preciosos”, pp. 265–284. Proyecto XIII.1 – CYTED, Madrid, España.
  • Pereira, Z., Meireles, C. e Pereira, E., 1999 – Upper Devonian Palynomorphs of NE Sector of Trás-os-Montes (Central Iberian Zone). XV Reun. Geol. Oeste Peninsular, Resumos, pp. 201–206
  • Pin, C., Paqette, J.L., Ibarguchi, J.G., Zalduegui, J.F., Aller, J.R. and Cuesta, L.A., 2000 - Geochronological and geochemical constraints on the origin of the ophiolitic units from the Northwestern Iberian Massif. GALICIA 2000, Variscan-Appalachian dynamics: the building of the Upper Paleozoic basement, Abstracts, pp. 146–147.
  • Rebelo, J.A. e Romano, M., 1986 - A contribution to the lithostragraphy and paleontology of the lower Paleozoic rocks of the Moncorvo region, Northeast of Portugal. Com. Serv. Geol. Portugal, T. 72, fasc.1/2, pp. 45–57.
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  • Ribeiro, A., Silva, J.B., Dias, R., Pereira, E., Oliveira, J.T., Rebelo, J.A., Romão, J. e Silva, A.F., 1991 – Sardic inversion tectonics in the Centro-Iberian Zone. III Congr. Nac. Geol., Resumos, Coimbra, p. 71.
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  • Sá, A.A., 2006 – A sucessão do Ordovícico superior de Trás-os-Montes (Zona Centro-Ibérica,Portugal) e sua correlação com Valongo e Buçaco. VII Cong. Nac.de Geologia, Univ. Évora, Livro de Resumos II, pp. 621–624.
  • Sousa, M. B., 1982 - Litostratigrafia e Estrutura do Complexo xisto grauváquico ante-Ordovícico - Grupo do Douro (NW de Portugal). Tese Univ. Coimbra, 222 p.
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