Morphology and sediments of the beach and shelf of the Bahía San Lucas, Baja California Sur, México.
DOI:
https://doi.org/10.37543/oceanides.v24i1.49Keywords:
Bahia San Lucas, coastal, delta, shelf, submarine canyonAbstract
Bahía San Lucas is located at the southern tip of the Baja California peninsula, thus it receives high energy waves from the Pacific Ocean. The morphology of the coastline and marine bottom of the bay was interpreted based on a bathymetric survey and beach profiles, while the characteristics of the sediments were obtained through a textural analysis. Both, morphology and sedimentology allowed us to know the relationship between landforms and the sedimentological behavior. The geometry and orientation of the limiting points of the bay and the temporary presence of the fan-delta El Salto in the central portion, control the processes of wave refraction and diffraction. Thus, the coastline of the bay can be divided into two areas,
where the wave energy processes and the transporting agent are different from each other and determine the morphology and sediment distribution of the beach. Seafloor topography of the bay is dominated by the presence of the San Lucas submarine canyon, whose head is just at the foot of the beach, in the innermost area of the bay. This canyon controls the development of the peninsular shelf, which is only 1.5 km wide with
a maximum depth of 50m. This shallow depth of the shelf, which allows the waves interact with seabed, and the presence of the submarine canyon are the responsible for the distribution of sediments in the seabed of the bay.
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Alsharhan, A.S. & A.A. El-Sammak. 2004. Grain-Size Analysis and Characterization of Sedimentary Environments of the United Arab Emirates Coastal Area. Jour. Coast. Res., 20(2): 464-477. https://doi.org/10.2112/1551-5036(2004)020[0464:GAACOS]2.0.CO;2
Bird, E. 2000. Coastal Geomorphology an Introduction. John Wiley and Sons, England, 322p.
Blott, J.S. & K. Pye. 2001. Gradistat: A grain size distribution and statistics package for the analysis of unconsolidated sediments. Earth Surface Processes and Landforms, 26: 1237-1248. https://doi.org/10.1002/esp.261
Camacho, V. 2003. Características morfodinámicas y texturales de los depósitos eólicos de Cabo Falso, Baja California Sur, México. Tesis de Maestría. Centro Interdisciplinario de Ciencias Marinas, La Paz, México, 139 p.
Drake, D.E., D.A. Cacchione, & H.A. Karl. 1985. Bottom Currents and Sediment Transport on San Pedro Shelf, California. Jour. Sed. Pet., 55 (1): 15-28. https://doi.org/10.1306/212F85EE-2B24-11D7-8648000102C1865D
Fletcher, J.M. & L. Munguía-Orozco. 2000. Active continental rifting in southern Baja California, México: implications for plate motion partitioning and the transition to seafloor spreading in the Gulf of California. Tectonics, 19 (6), 1107-1123. https://doi.org/10.1029/1999TC001131
Folk, R. L. 1974. Petrology of sedimentary rocks. Hemphill Publishing, Co. Texas, 182 p.
Folk, R.L. & W. Ward. 1957. Brazo river bar: a study in the significance of grain size parameters. Jour. Sed. Pet., 27: 3-26. https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D
Friedman, G.M. 1979. Differences in size distributions of populations of particles among sands of various origins. Sedimentology, 26: 3-32. https://doi.org/10.1111/j.1365-3091.1979.tb00336.x
Gastil, G., G.J. Morgan & D. Krummenacher. 1978. Mesozoic history of peninsular California and related areas east of the Gulf of California. En: Martínez-Gutíerrez, G. & P.S. Sethi. 1997. Miocene-Pleistocene sediments within the San José del Cabo Basin, Baja California Sur, México. Geological Society of America. Special Paper, 318: 141-166.
Guerreiro, C., A. Rodrigues, J. Duarte, A. Oliveira & R. Taborda. 2007. Bottom sediment signatura associated with the Oporto, Aveiro and Nazaré submarine canyons (NW off Portugal). Thalassas, 23 (1): 9-18.
Guillén, J. & J.A. Jiménez. 1995. Processes behind the longshore variation of the sediment grain size in the Ebro Delta coast. Jour. Coast. Res., Vol. 11 (1): 205-218.
INEGI. 1996. Estudio Hidrológico del estado de Baja California Sur. Secretaria de Programación y Presupuesto, México, 206 p.
Kinsman, B. 1965. Wind Waves. Prentice Hall, Inc. New Jersey, 676 p.
Komar, P.D. 1976. Beach Processes and Sedimentation. Prentice Hall, New Jersey, 429 p.
López-Ramos, E. 1982. Geología de México. Instituto de Geología de la UNAM, 3ª. Ed., México, 454 p.
Marsh, W.M. & J. Dossier. 1981. Landscape: an introduction to physical geography. Addison-Wesly, U.S.A, 637 p.
McLaren, P. & D. Bowles. 1985. The effects of sediment transport on grain-size distribution. Jour. Sed. Pet., 55 (4): 457-470. https://doi.org/10.1306/212F86FC-2B24-11D7-8648000102C1865D
Montaño-Ley. Y., M. Gutiérrez-Estrada & J. Aldeco-Ramírez. 1988. Dinámica de playas del delta del Río Balsas, México. An. Centro Cienc. Mar Limnol. Univ. Nal. Autón. México, 16 (1):17-32.
Murillo-Jiménez, J.M., F. William, E. Nava Sánchez, V. Camacho Valdez & A. León Manilla. 2007. Sediment sources of beach sand from the southern coast of the Baja California peninsula, Mexico-Fourier grain-shape análisis, 297-318. En: Arribas J. (Ed.) Sedimentary Provenance and Petrogenesis: Perspectives from Petrography and Geochemistry. The Geological Society of America, Inc. Boulder, Colorado. 396 p. https://doi.org/10.1130/2006.2420(18)
Nava-Sánchez, E.H., F. Salinas-González, L. Godínez-Orta, S. Rueda-Fernández, & R. Cruz-Orozco. 1994. Beach profiles and grain size on the tip of the península of Baja California. Inv. Mar. CICIMAR, 9(1): 25-41.
Nava-Sánchez, E.H., D.S. Gorsline & A. Molina-Cruz. 2001. The Baja California peninsula borderland: structural and sedimentological characteristics. Sedimentary Geology. 144: 63-82. https://doi.org/10.1016/S0037-0738(01)00135-X
Navarro-Lozano, J.O. 2006. Caracterización sedimentológica y geomorfológica de los ambientes costeros en la Bahía San Lucas, Baja California Sur, México. Tesis de Maestría, Centro Interdisciplinario de Ciencias Marinas del Instituto Politécnico Nacional, La Paz, México, 144 p.
Parrado, J.M. & M. Achad, M.1999. Grain-size trends associated with sediment transport patterns in Cadiz Bay (southwest Iberian Peninsula). Biol. Inst. Esp. Oceanog., 15(1-4): 269-282.
Robles-Gil, S. 1998. Informe climatológico y meteorológico para el proyecto El Rincón, 24p.
Sahu, B.K. 1964. Depositional mechanisms form the size analysis of clastics sediments. Jour. Sed. Pet., 34(1): 73-83. https://doi.org/10.1306/74D70FCE-2B21-11D7-8648000102C1865D
Self, R.P. 1977. Longshore variation in beach sands Nautla area, Veracruz, Mexico. Jour. Sed. Pet., 47 (4): 1437-1443. https://doi.org/10.1306/212F7388-2B24-11D7-8648000102C1865D
Shepard, F.P. 1964. Sea-floor valleys of Gulf of California. En: Van Andel, T.H. & Shor, G.G. (Ed.) Marine Geology of the Gulf of California. Am. Assoc. Petroleum Geologist, Memoir, 3: 157-192.
Shepard, F. P. & R. Dill. 1966. Submarine canyons and other sea valleys. Rand-McNally and Co, Chicago. 381 p.
Short, A.D. & P.A. Hesp. 1982. Wave, beach and dune interactions in southeastern Australia. Marine Geology, 48: 259-284. https://doi.org/10.1016/0025-3227(82)90100-1
Troyo, S. 2003. Oleaje de viento y ondas de infragravedad en la zona costera de Baja California Sur. Tesis de doctorado, Centro Interdisciplinario de Ciencias Marinas del Intituto Politécnico Nacional, La Paz, México, 239p.
Wentworth,C. K. 1922. A scale of grade and class terms for clastic sediments. Jour. Geol., 30: 377-392. https://doi.org/10.1086/622910
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Copyright (c) 2009 J. O. Navarro Lozano, E. H. Nava Sánchez, L. Godinez-Orta, J. Murillo-Jimenez
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