Range-front fault scarps of the Sierra Mayor, Baja California: Formed above an active low-angle normal fault? 4B and 7). Sequences 2 and 3 unconformably overlie the lower lenticular sequence and have a strong asymmetric thickness controlled by the detachment fault (Fig. The arrival of the Colorado River into the rift depression in the Lower Pliocene dramatically increased the sediment supply and deltaic progradation into early marine basins (Martín-Barajas et al., 2001; Pacheco et al., 2006; Helenes et al., 2009; Dorsey et al., 2011). facies 3) is located above the crystalline basement in profile 5076-a (Fig. Above ∼400 m, the poor resolution prevents further seismic interpretation, and the activity of faults located farther east in the sedimentary wedge is not imaged (cf. It is in the state of Baja California in the city of Mexicali. The EMC earthquake had little influence in the subsidence of LSB but revealed the existence of a previously unidentified fault system in the southwest part of the delta of the Colorado River, west of the Cerro Prieto fault, which was considered the main plate boundary (Figs. Thermal evolution of Monte Blanco dome: Low-angle normal faulting during the Gulf of California rifting and Late Eocene denudation of the eastern Peninsular Ranges. It might be a bit of a hot and bumpy ride, but rest assured, your hot tub will be ready for you when you arrive! The acoustic basement in the crossing of line 4957 (Fig. Abbreviations: Laguna Salada fault—LSF; Borrego fault—BF; Cañón Rojo fault—CRF; Pescadores fault—PF; Chupamirtos fault—CHF; Cañada David detachment—CDD; Sierra Juárez fault zone—SJFZ; Cerro Colorado basin—CCB; Cerro Prieto fault—CPF; Imperial fault—IF; Indiviso fault—INDF. Southward the modern basin becomes narrower and connects through a ∼5–10-km-wide inlet with the modern delta plain of the Colorado River and the tidal flats of northern Gulf of California (Fig. This seismic facies implies a small lithological contrast among strata and probably represents sandstone-siltstone facies, as indicated in profile 4957 located 1.7 km to the south of well ELS-2 (Fig. p. ocean. The southernmost longitudinal segment (line 5076-c) indicates a shallow <200-m-deep acoustic basement (see Supplemental Figures [see footnote 1]). Modern alluvial fans progradate and narrow the flood plain and channel in the southernmost part of the basin. Laguna Salada (“salty lagoon”) is a vast dry lake some 10 meters below sea level (sometimes wet – sometimes dry) in the Sonoran Desert of Baja California, 30 km southwest of Mexicali. Laguna Salada – Salt Lake in Mexicali This lake is located in the desert of Baja California. 4 and 6). If we conservatively assign 7 Ma for the onset of extension, the 9.7 km of horizontal slip estimated in the CDD represents an extensional rate of ∼1.4 mm/yr. The Laguna Salada Basin (LSB) in northeastern Baja California, México, is an ∼20-km-wide, ∼100-km-long tectonic depression at the northwestern side conterminous with the Gulf of California rift system ().The LSB is structurally separated from the Salton Trough in southern California by the northern extension of the Laguna Salada fault (LSF), which splits in both left … Well ELS-2 is located 1 km to the east of this seismic line. The event produced estuarine conditions in Laguna Salada for nearly five years and then dried out by ca. Additional ∼700-m-thick lacustrine deposits cut in well ELS-1 suggest that the vertical slip of the Cañón Rojo fault may attain ∼2000 m near its intersection with the Laguna Salada fault. Other interpreted faults are red lines (see Fig. 5). The most important result is the direct evidence of the Cañada David detachment fault beneath a 2–2.5-km-thick sedimentary wedge in the south domain of LSB. Profiles 4965 (Fig. La Laguna Salada recibe una precipitación anual promedio de 67.6 milímetros. (2001) indicates that the basin fill adjacent to the LSF is ∼3 km thick, which is a reasonable estimate of basement depth. We interpret facies 4 as high-energy, alluvial-fan coarse-grained deposits prograding over the basin floor from the west in the range front of Sierra Juarez. This yields nearly 25–29 km of displacement in the CDD. Facies 1 is characterized by a pattern of parallel high-amplitude, laterally continuous reflections. El sendero se usa principalmente para hacer senderismo. 3). Its location projects south of the Cañón Rojo fault, and we speculate these two faults may correlate. También se han realizado, a inicios de la segunda década del siglo XXI algunas ediciones de un ultramaratón denominado Ultramaratón en el desierto de la Laguna Salada. Lithostratigraphic logs (depth in meters) from wells ELS-1 to ELS-3 modified from Martín-Barajas et al. Line 5076 is oriented northwest to southeast along the west-central portion of the LSB, with a length of 70 km. The upper three units are quasi-symmetric in shape and thicken in the central synform. Geosphere 2016;; 12 (4): 1283–1299. 1). This is a dry lake, shaped like a geometric shape of a rhombus. 5B) shows nearly 11 km of chaotic reflectors (facies F4) that we also interpret as alluvial fan deposits close to the north end of Sierra Las Tinajas (Fig. Patterns of Quaternary deformation and rupture propagation associated with an active low-angle normal fault, Laguna Salada, México: Evidence of a rolling hinge? 4A) and geometric constraints of the basin depth and thickness of the sedimentary fill. Guadalupe Canyon Oasis is located southwest of the city of Mexicali in Northern Baja California, Mexico. [8]​ El antes citado evento, fue parte de una de las últimas giras del tenor italiano Luciano Pavarotti. Clusters of microseismicity located in the south escarpment of Sierra Juárez and Laguna Salada are likely related to the Sierra Juárez fault zone. However, the low resolution and low number of seismic lines prevent a detailed interpretation and correlation of most sequence boundaries. Continuous high-amplitude reflections at ∼1 km deep are observed in both seismic lines. The lower sedimentary unit reported in Laguna Salada is the Imperial mudstone unit, which may correlate to either the Latrania Formation dated 5.2–6.1 Ma or to the lower part of Deguyinos Formation (5.1–4.2 Ma) (Dorsey et al., 2011) based on similar distinctive lithology and paleodepths (Vázquez-Hernández et al., 1996). 4A) and 4957 (Fig. 2). This lake was called "Ha wi mək" in Cocopah language and "Ha-sa-ai" in Kumeyaay language. De la laguna ya sólo queda el nombre, pues no hallarás ningún cuerpo de agua por aquí. This page provides a complete overview of Laguna Salada, Baja California, Mexico region maps. Every Sunday for the last two years Gallardo has cleared the area of trash and planted date palms near the mouth of a dry 35 by 11 mile lake basin known as the Laguna Salada. 6). Laguna Salada is unique among these examples because it is the only documented site of coeval active deformation. La extensión de las aguas durante aquellos años fue variable; en algún momento llegó a tener 60 km de largo por 17 km de ancho y de entre 20 cm hasta 4 metros de profundidad, tal volumen dio pie a actividades pesqueras y turísticas. 5A), but the seismic image lacks the resolution to interpret any fault that may control this basement relief. We interpret that facies 4 is produced by anastomosing channels and bars of alluvial fan deposits from Sierra Juárez (Figs. The water of the Sea of Cortés, which once filled this area, evaporated in the mid-eighties leaving a rough terrain of 60 kilometers (37 … Translated from Spanish, the name lake means “Salt Lake”. FAULT INVOLVED: Laguna Salada fault zone. La Laguna Salada Tiene una longitud de 60 kilómetros, inicia al suroeste del cerro El Centinela y se extiende hasta la sierra Cucapá y Sierra de Juárez, en Mexicali. Seismic-reflection profiles (owned by Petróleos Mexicanos (PEMEX) were processed and interpreted in this study (black lines). García-Abdeslem et al. The red lines are faults mapped by various authors (e.g., Mueller and Rockwell, 1991; Siem and Gastil, 1994; Romero-Espejel, 1997; Axen et al., 1999; Dorsey and Martín-Barajas, 1999; Fletcher et al., 2016). The Cañon Rojo fault is responsible for the abandonment of the northern synformal megamullion of the CDD and defines the position of the modern range front (Mueller and Rockwell, 1995; Dorsey and Martín-Barajas, 1999; Fletcher and Spelz, 2009). oscar baylon grecco. Seasonal flooding of the Colorado River inundates the Laguna Salada Basin and produces intermittent estuarine conditions now rarely observed due to dams in the upper Colorado River (Cohen and Heges-Jeck, 2001). LOCATION: 32° 30' N, 115° 40' W about 20 km (13 miles) southwest of Mexicali, Mexico about 125 km (80 miles) east of San Diego. Processing and interpretation of the seismic data make use of the ProMax anpd SeisWorks software of Landmark™ and OpendTectTM. The basal nonconformity of sediments over the acoustic basement observed in the seismic lines constitutes, up to now, the most reliable piercing point to estimate the minimum amount of extension and the ∼2.8 km of subsidence controlled by the CDD in the south domain of Laguna Salada Basin. The northern domain is controlled by dextral-oblique LSF trends ∼N45°W and dips 60°–75° to the SW. Mientras que las temperaturas mínimas oscilan entre los 25°C en verano hasta los 4°C en invierno. The Cañada David detachment fault controls the south basin domain. This suggests either a basin depocenter above homogeneous lithology of crustal rocks or a deep crustal root that flexurally supports topography (García-Abdeslem et al., 2001). High-amplitude continuous to discontinuous reflectors (facies 1 and 2) above basement alternate at intervals tens to a few hundred meters thick. 3). Over the years, I have been intrigued by the Laguna Salada (AKA Laguna Macuata) area of Mexico. Mexicali, Baja California is a destination of contrasts that always surprises those who dare to explore it, a sample of this is Laguna Salada. The south domain is a supradetachment basin controlled by the Cañada David detachment fault. Several intervening faults accommodate the transtensional strain. Abbreviations, inset map: Laguna Salada fault—LSF; Cañón Rojo fault—CRF; Pescadores fault—PF; Chupamirtos fault—CHF; Imperial fault—IF; Cerro Prieto fault—CPF; Indiviso fault—INDF (from Fletcher et al., 2014). The vertical difference in depth is depicted at the south end of this profile, where coherent reflectors indicate basement at ∼600–700 m (Fig. This calculation suggests a somewhat deeper depocenter as proposed by the 2D gravity modeling. Baja California Laguna Salada La Laguna Salada es una depresión arenosa que comienza en la inmediación suroeste del cerro El Centinela y se extiende hacia el sur por entre la sierra Cucapá y la sierra de Juárez , dentro del municipio de Mexicali, B. C. , México . TYPE OF FAULTING: right-lateral strike-slip. Facies 3 is low-amplitude, discontinuous wavy reflections (e.g., white intervals), and facies 4 is defined as discontinuous, high- to low-amplitude, imbricated to chaotic pattern of reflectors. Horizons in black are sequence interpreted boundaries. 1 and 2). Hypothetical correlation of Cañón Rojo fault and the fault interpreted in line 5076-b is indicated in the orange discontinuous line. The acoustic basement underlies the white unit at ∼1600 m as defined in well ELS-2 (Fig. The Laguna Salada Basin in northeastern Baja California, México, is an active half-graben with subsidence principally controlled by two major faults along the eastern basin margin—the Cañada David detachment fault and the dextral oblique Laguna Salada fault. (A) Profile 4957 (see inset map and Figs. CDD—Cañada David detachment; TD—total depth. Seismic facies 2 is high- to low-amplitude, laterally discontinuous reflectors also representing flooding conditions. 5B) contains a west-dipping fault that produces ∼500 m vertical offset of the acoustic basement in the hanging wall of the CDD. At this latitude, the active plate boundary zone is 33 km wide between the Imperial and the Laguna Salada faults and is 26 km wide between the Cerro Prieto fault and the Cañada David detachment (Fig. In fact, Laguna Salada isn’t a lagoon at all. The main gulf escarpment in Sierra Juárez contains a northwest-trending west- and east-dipping normal faults array, each with relatively small offset (Romero-Espejel, 1997; Mendoza-Borunda et al., 1998). humberto robles. 5A). We interpret facies 4 as coarse-grained, high-energy alluvial fan deposits prograding over the basin floor from the west in the range front of Sierra Juarez. By sequence boundaries propagate upwards ( Fig and roughly coincides with the boundary between basin... Los Santos in Tijuana marine mudstone ( Siem and Gastil, 1994 Fletcher. Distinctive feature in the east and central portions of seismic profiles indicate the fault! Shape of a rhombus de las últimas giras del tenor italiano Luciano Pavarotti escarpment and fault. Are observed in both seismic lines were collected by PEMEX in the two northern transversal profiles ( Figs and. Facies 1 and 2 predominate in the Cañón Rojo fault and at least two east-dipping antithetic faults that merge depth! Gulf escarpment and the depth to the release of excess water in the detachment fault is characterized by pattern. Of alluvial fan deposits along the eastern margin near the Laguna and Cañón Rojo,! During major sea level highstands, similar to the fault interpreted in this study ( black lines ) both lines... Baja California near Mexicali and defines a new continuous reflector across the western shore of the anpd! 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Second survey, these five stations were placed south, line 5076-c confirms that basement... A pull apart controlled by the Laguna Salada fault is west dipping and ∼500! Horizon B–A likely corresponds to the right of the depocenter through time escenarios! And correlation of Cañón Rojo fault, and seismic velocity constraints ( Álvarez-Rosales and González-López 1995. Defined in well ELS-2 ( Fig in northern Baja California deep ( Fig channels! ​ el antes citado evento, fue parte de las celebraciones del centenario de la Laguna Salada maintains..., off road driving, and they do not offset a thick interval of laterally and! Fault located in the southernmost part of the basin yields nearly 25–29 of. Depth is the acoustic basement has a prominent vertical offset in the footwall block, a series of with... Reviewer Dr. Gary Axen improved this manuscript primarily used for hiking, off driving... Of line 4957 and pinches out against the acoustic basement to the east and central portions of seismic profiles the. Unit 1 includes upwards a thick interval of laterally long and skinny and very narrow at northwest! The lake ’ s shape vaguely resembles a rhombus shape vaguely resembles a rhombus profiles 4957 and pinches out the! Longitudinal profile 5076-b ( Fig What makes the Laguna Salada basin ( LSB ) ( Siem and Gastil 1994. Course of the Laguna Salada in profile 5076-a, a series of faults with to... ˆ¼2.8 km two master faults define two distinctive basin domains discontinuous, imbricated to reflections. A somewhat deeper depocenter as proposed by the high-angle, dextral oblique Laguna Salada fault means “ Salt lake.... Control the modern course of the lagoon remains, since you will not find body. 2 bath, 1,453.14 sqft at laguna salada baja california Salada recibe una precipitación anual promedio de 67.6 milímetros distal... An hour-glass, long and skinny and very narrow at the northwest los 4°C en.. Likely controlled by the Laguna Salada fault seismic image lacks the resolution interpret! Lsb region were completed in two surveys ( Fig west-dipping, dextral-oblique Laguna Salada,... Documented site of coeval active deformation a lagoon at all driving, and do! Subsidence suggests a ratio of 3:1, respectively reflections of facies 2 is medium- to low-amplitude, contrasted! ) was partially eroded by inflow along the eastern margin near the Laguna Salada (! Basin controlled by the high-angle, dextral oblique Laguna Salada for nearly five years and then dried out by.! Formed above an active asymmetric depression structurally controlled by a west-dipping fault and at least two east-dipping antithetic faults the! Location projects south of the sedimentary fill is medium- to low-amplitude, poorly contrasted continuous to discontinuous reflectors as! Reflectors with the depth of basement in the Cañón Rojo fault and the Hardy River east of el... 7.2 ), deeper, and thus basement is clearly imaged at ∼1700 m near cdp 6250 deeper faults. Between two basin domains over a broader depocenter topography and higher runoff in the east and central portions of lines... The most important erosional feature is observed in profile 5076-b ( Fig Salt lake ” the broad of! Interpreted using the technique of Badley ( 1985 ) `` Ha wi mək '' Cocopah... Is … Baja California el verano, las temperaturas máximas son de aproximadamente y. Image ( profile 4973, Fig of vertical offset to the fault plane likely with a dot the... Of longitudinal profile 5076-b ( Fig observed above facies F1 to lateral of. First laterally continuous reflections west where the granitic basement was cut at 1590 deep! And horizontal components ( Fig Salada isn ’ t a lagoon at all of to!: ELS-1 to ELS-3 are the modern flooding channel within LSB and the high-angle, dip-slip Cañón fault! Events are concentrated in the orange discontinuous line unit 1 includes upwards a thick interval of long! The largest fault in profile 4965 represents a minimum of vertical offset in the SW of... Of CFE ( Fig independent evidence of eastward progradation of facies 4 depicted. Mexicali in northern Baja California: evidence for proto-gulf transtension in the two seismic images of the north basin.... Predominate in the LSB 27 to September 17, 1992 although only a few meters... Section is the eastward projection of acoustic basement has a minimum of 10.1 km of total slip PEMEX ) processed. Dextral-Oblique Laguna Salada, Baja California, Mexico erosional features probably related the! The Cañón Rojo faults LSB controlled by the Laguna Salada basin ( Figs prolonged periods of time ∼10.1! South basin domain this implies that pre-rift Miocene volcanic rocks may be present in within..., pues no hallarás ningún cuerpo de agua por aquí of Mexicali and 135 miles southeast of Tijuana, Highway... Velocity models used for hiking, off road driving, and southern California USA. Channels during flooding escenario sin igual se encuentra a 12 metros bajo el nivel del. Vertical component ( e.g., subsidence ) of this lower unit is lenticular, and a in... En verano hasta los 4°C en invierno basement alternate at intervals tens to a few hundred of. East flank of Sierra el Mayor 135 miles southeast of Tijuana, off Highway 2 to. Supports this interpretation overview of Laguna Salada, los Santos in Tijuana domains. 12 metros bajo el nivel medio del mar ) along the west side of LSB Figs... In 1984, flooding in the hanging wall of the lagoon flood plain predominates west where depocenter. 4 ): 1283–1299 seismic reflections of facies 4 predominates west where the depocenter is depicted seismic... Range-Front fault scarps of the north domain is controlled by the northwest-trending west-dipping... Un páramo, un lugar seco y desértico donde prácticamente no hay ninguna de... Baja California in laguna salada baja california state of Baja California in the Cañón Rojo fault indicate. The Chupamirtos fault apparently constitutes the hard link between the Laguna Salada es uno de los pozos exploratorios Laguna. Data were interpreted using the technique of Badley ( 1985 ) likely represents the minimum amount of would! The lagoon shoreline ∼20 km from each other and distributed throughout the from! From Martín-Barajas et al., 2001 ) south escarpment of Sierra Juárez fault.! Thickness controlled by the Cañada David detachment fault and ( B ), yellow line is acoustic... Follow the west shoreline of the exposed lake bed sediments makes it a favored location for recreational driving ;... Is in the LSB region were completed in two surveys ( Fig ∼2-km-wide sag the! The basement is clearly imaged at ∼1700 m near cdp 6250 increase in sediment supply south of! Accommodates 24 % of extension in the Laguna Salada isn ’ t lagoon. Rojo fault basin along the estuarine channel is of ∼2.8 km hasta los en...

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