Orocline
An orocline — from the Greek words for "mountain" and "to bend" — is a bend or curvature of an
S. Warren Carey in 1955 in a paper setting forth how complex shapes of various orogenic belts could be explained by actual bending, and that understanding this provided "the key to understanding the evolution of the continents".[2] Carey showed that in a dozen cases where such bends were undone the results were substantially identical with continental reconstructions deduced by other means.[3] Recognition of oroclinal bending provided strong support to the subsequent theory of plate tectonics
.
Examples
- The Bolivian Orocline is a seaward concave bending in the coast of
- The Maipo Orocline or Maipo Transition Zone is an orocline located between 30° S and 38°S in the Andes with a break in trend at 33° S.[8]
- The Arauco Orocline a subtle orocline located at 37° S in south-central Chile. It marks a seaward-convex bend in the Andes.[9]
- Cantabrian Orocline[10] and Gibraltar Orocline,[11] Spain.
- Carpathian Orocline, Romania.[12]
- Balkan Orocline, Romania, Bulgaria and Serbia.[12]
- Northern Italy
- Western Alps Orocline, Italy, France and Switzerland.[14]
Oroclines in cratons
- Bothnian oroclines in the Svecofennian Domain in Finland and Sweden.[15]
- Inari orocline including the Lapland Granulite Belt in Finland, Norway and Russia.[15]
- Lachlan Orocline, eastern Australia[16]
- Dabashan Orocline, China[17]
See also
Notes
- ^ Carey 1955, p. 257. Note that the initial formation does not have to be straight.
- ^ Carey 1955, p. 257.
- ^ Carey 1955, p. 255.
- ^
- ^
- .
- ^ Arriagada, César; Ferrando, Rodolfo; Córdova, Loreto; Morata, Diego; Roperch, Pierrick (2013), "The Maipo Orocline: A first scale structural feature in the Miocene to Recent geodynamic evolution in the central Chilean Andes" (PDF), Andean Geology, 40 (3): 419–437
- .
- ^ a b Faccenna C., Piromallo C., Crespo-Blanc A., Jolivet L., Federico Rossetti F.(2004) Lateral slab deformation and the origin of the western Mediterranean arcs, Tectonics, 23: (1) 1-21 [1]
- ^ a b Shaw J., Johnston S. T., The Carpathian–Balkan bends: an oroclinal record of ongoing Arabian–Eurasian collision, Journal of the Virtual Explorer, 43(4) [2]
- ^ Finetti et al, 2005, Crustal geological section across C Italy from the Corsica Basin to the Adriatic Sea based on geological and CROP Seismic data [https://www.researchgate.net/publication/256305887_Crustal_geological_section_across_central_Italy_from_the_Corsica_Basin_to_the_Adriatic_Sea_based_on_geological_and_CROP_seismic_data/citation/download}
- ^ Edi Kissling E., Romain Bousquet R., Ford M., Schmid S. M. (2012) Formation of the arc of the Western Alps and Alps-Apennines transition in the light of new geophysical data on the lithospheric architecture around the Ligurian knot, EGU Conference Vienna Apennines_transition_in_the_light_of_new_geophysical_data_on_the_lithospheric_architecture_around_the_Ligurian_knot
- ^ a b Lahtinen, R.; Sayab, M.; Johnston, S.T. (2016). "Inari orocline – progressive or secondary orocline". Institute of Seismology, University of Helsinki Report S-65. Lithosphere 2016 Ninth Symposium on the structure, composition and evolution of the lithosphere in Fennosscandia. pp. 69–74.
- ^ Cayley, R. (2014). "The Lachlan Orocline of Eastern Australia. Giant folds, the geodynamic processes that can form them, and how these new understandings have potential to revolutionise the resource prospectivity game in Eastern Australia". New Perspectives Workshop, September 2014. Australian Institute of Geoscientists. Retrieved 4 March 2018.
- .
References
- Carey, S. Warren (1955), "The Orocline Concept in Geotectonics, Part I" (PDF), Papers and Proceedings of the Royal Society of Tasmania, 89: 255–288.
External links
- Van der Voo, Rob (December 2004), "Paleomagnetism, Oroclines, and Growth of the Continental Crust" (PDF), GSA Today, 14 (12): 4–9, .