Additional â¼700-m-thick lacustrine deposits cut in well ELS-1 suggest that the vertical slip of the CaÃ±Ã³n Rojo fault may attain â¼2000 m near its intersection with the Laguna Salada fault. When dry, the flatness of the exposed lake bed sediments makes it a favoured location for recreational driving. 3), and thus basement is likely deeper in the north basin domain near the Laguna Salada fault. 4B), we interpret five stratigraphic sequences with basal boundaries defined by these continuous reflectors of facies 1. 2). This sag is likely controlled by a west-dipping fault and at least two east-dipping antithetic faults. 4 and 6). It is shaped somewhat like an hour-glass, long and skinny and very narrow at the center. thesis], A gravity and magnetic study of the Laguna Salada area, B.C. Due to their lateral continuity, facies 1 and 2 are interpreted to represent flooding and prolonged lacustrine conditions produced by the Colorado River entering Laguna Salada Basin. Horizons in black are sequence interpreted boundaries. 5A). Another prominent relief in the acoustic basement occurs at the northwest end of profile 5076-b (Fig. Abbreviations, inset map: ELS-1 to ELS-3, well of ComisiÃ³n Federal de Electricidad (CFE). 5B). 8). The Chupamirtos fault likely represents the structural boundary between two basin domains. The acoustic basement beneath the hanging wall is disrupted by faults with tents to a few hundred meters of offset. These last events are concentrated in the northwestern basin domain, and no correlation with faults antithetic to the CDD is observed. La peligrosa Laguna Salada de Baja California 2 minutos Cuando uno piensa en la palabra “ laguna ”, se imagina un cuerpo de agua rodeado de tierra, escenario de hermosos paisajes. 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-stepping and right-stepping shear strands (Isaacs, 1987) and produces basement ridges up to â¼660 m (Fig. The stratigraphic units in seismic lines in Laguna Salada are interpreted on the basis of seismic facies and stratigraphic sequences limited by sequence boundaries. The south domain is a supradetachment basin controlled by the CaÃ±ada David detachment fault. However, a large negative Bouguer gravity anomaly straddles the main gulf escarpment and the central part of the LSB. The LSF and the CDD fault are kinematically linked by the CaÃ±on Rojo and Chupamirtos faults (Mueller and Rockwell, 1991) (Fig. This well did not reach the Imperial marine mudstone unit inferred to lie at a depth as recorded in stratigraphy of the Cerro Colorado basin (VÃ¡zquez-HernÃ¡ndez et al., 1996). Southward the modern basin becomes narrower and connects through a â¼5â10-km-wide inlet with the modern delta plain of the Colorado River and the tidal flats of northern Gulf of California (Fig. Range-front fault scarps of the Sierra Mayor, Baja California: Formed above an active low-angle normal fault? Mueller and Rockwell (1991) proposed that the CaÃ±Ã³n Rojo fault is a dilatation stepover in a pull apart bounded by the dextral oblique Chupamirtos fault. 4A and 4B). Active-source, seismic-reflection data constrain the geometry of the active detachment fault and indicate two structural domains. An eastward migration of the depocenter is depicted upward in profile 4965 (Fig. The south domain is a supradetachment basin controlled by the CaÃ±ada David detachment fault. (2001) indicates that the basin fill adjacent to the LSF is â¼3 km thick, which is a reasonable estimate of basement depth. (2001), is located along the Laguna Salada fault, Cerro Prieto geothermal field, and the eastern front of Sierra JuÃ¡rez, and only 17 events lie within the Laguna Salada Basin. Its low-angle (<20Â°) and Quaternary fault scarps display a curvilinear trace extending â¼55â60 km along the western mountain front of Sierra El Mayor (Fig. LAGUNA SALADA, BAJA CALIFORNIA SUR, MEXICO. The lower lens shape sequence is â¼4 km wide and â¼500 m thick, and the seismic reflections are parallel to the acoustic basement (Fig. 1 and 2). This suggests either a basin depocenter above homogeneous lithology of crustal rocks or a deep crustal root that flexurally supports topography (GarcÃa-Abdeslem et al., 2001). It is in the state of Baja California in the city of Mexicali. TIME: February 23, 1892 / 11:20 pm PST. 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 CaÃ±ada David detachment (Fig. 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. Profile 5076-b (Fig. The acoustic basement in the hanging wall deepens to a maximum of â¼2100 m in profile 4973 and to â¼2500 m in profile 4965 (Figs. The fault located in the SW sector of the seismic profile coincides with the western shore of the lagoon flood plain. The rupture propagated north along a complex dextral-oblique fault zone parallel to Laguna Salada fault through the Sierra Cucapah (Fletcher et al., 2014; TerÃ¡n et al., 2015). 1 and 2 for location) across the western end of the north basin domain. humberto robles. The CaÃ±Ã³n Rojo and Chupamirtos faults produced the abandonment of the Cerro Colorado synformal domain of the CaÃ±ada David detachment and reduced in â¼25% its original length (Siem and Gastil, 1994; Fletcher and Spelz, 2008). The supradetachment basin domain accumulates a sedimentary wedge more than 2.5 km thick in the west-central part of the basin, and the subsurface portion of the CaÃ±ada David detachment represents 24% of extension in the western main plate boundary zone. We observe a systematic lateral facies change across the three transversal profiles (Figs. Furthermore, in the southernmost seismic image (profile 4973, Fig. 6B) clearly show that laterally continuous reflectors (seismic facies 1 and 2) penetrate westward and interfinger with facies 3 and 4 produced by alluvial fan deposits. The CCD produces fault scarps along the west side of Sierra El Mayor (from Axen et al., 1999; Fletcher and Spelz, 2009; Spelz et al., 2010). Seismic facies 3 is low-amplitude, poorly contrasted continuous to discontinuous reflectors interpreted as subaerial distal fan sandstone deposits. Mexicali, Baja California is a destination of contrasts that always surprises those who dare to explore it, a sample of this is Laguna Salada. 1). 1). Red stars are two historical earthquakes located within the eastern basin margin: the 1892, Mw > 7 and the 1934, Mw 6.5 (Ellsworth, 1990). La extensiÃ³n de las aguas durante aquellos aÃ±os fue variable; en algÃºn momento llegÃ³ 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 turÃsticas. It is also notorious for its dust storms (when dry), usual… enrique aranda j. i n d i c e. 1. caracteristicas de la laguna salada. The Laguna Salada Basin in northeastern Baja California, MÃ©xico, is an active half-graben with subsidence principally controlled by two major faults along the eastern basin marginâthe CaÃ±ada David detachment fault and the dextral oblique Laguna Salada fault. Horizon 1 is the first laterally continuous reflector across the basin. Farther south, line 5076-c confirms that crystalline basement is very shallow in the east flank of Sierra Las Tinajas. Guadalupe Canyon Oasis is located southwest of the city of Mexicali in Northern Baja California, Mexico. The exploration wells drilled by the ComisiÃ³n Federal de Electricidad (CFE) in the LSB are depicted as green dots (ELS-1 to ELS-3). One is the strong asymmetric subsidence that maintains depocenters along the eastern margin near the Laguna and CaÃ±Ã³n Rojo faults. The yellow stars denote epicenter location of the three major historical earthquakes recorded in the study area (two in Laguna Salada [LSE] and the El MayorâCucapah earthquakes [EMC]), indicating year and magnitudes. La laguna salada forma parte del sistema del Delta del RÃo Colorado e histÃ³ricamente ha sido receptÃ¡culo de los excedente de sus aguas, asÃ como tambiÃ©n de mareas inusitadamente altas del Mar de CortÃ©s, esto Ãºltimo, hasta antes de construirse la carretera federal 5 que va de Mexicali a San Felipe. 3). Horizon BâA likely corresponds to the boundary between units 3 and 4 in well ELS-2 (MartÃn-Barajas et al., 2001). 1) (GarcÃa-Abdeslem et al., 2001). The seismic networks registered â¼582 microearthquakes with magnitudes lower than 3.6 chiefly concentrated along the LSF and the mountain front of Sierra JuÃ¡rez toward the southeast (Fig. From profile 4965 (Fig. En el verano, las temperaturas mÃ¡ximas son de aproximadamente 43Â°C y en el invierno se acercan a los 20Â°C. 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! Es la zona más baja de México, se encuentra a 12 metros bajo el nivel medio del mar. These two crystalline blocks are composed of Late Cretaceous granitic rocks and pre-Cretaceous high-grade metamorphic rocks (Barnard, 1968; Gastil et al., 1974; Siem and Gastil, 1994; Axen et al., 2000). 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. In fact, Laguna Salada isn’t a lagoon at all. Note again the correspondence of these reflectors with the boundary between units 3 and 4 and the depth to the crystalline basement. The inset map shows the major tectonic features of northwestern Mexico and the location of the study area (i.e., the Laguna Salada BasinâLSB). Its location projects south of the CaÃ±Ã³n Rojo fault, and we speculate these two faults may correlate. doi: https://doi.org/10.1130/GES01261.1. 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. Here the thickest basin fill corresponds to the site where the acoustic basement in the hanging wall intersects the acoustic basement in the footwall block. 8). 1). The lowermost stratigraphic unit in Laguna Salada crops out in the footwall block of the CaÃ±on Rojo fault, a N-Sâtrending, high-angle normal fault forming a dilatational stepover along the Laguna Salada fault (Fig. This geometric projection suggests that basement in the hanging wall intersects the Laguna Salada fault at â¼3.8 km below the surface, assuming that the Laguna Salada fault maintains a â¼70Â° dip to the west (Fig. 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. The Chupamirtos fault bounds the Cerro Colorado basin along the west-southwest and likely intersects the CDD north of seismic profile 4965 (Fig. The modern lake basin is bordered by a 5â15-km-wide belt of coalescing alluvial fans derived from Sierra JuÃ¡rez in the west and by a narrower 0.5â3-km-wide belt of alluvial fans fed from the Sierra Cucapah and Sierra El Mayor in the east. 3). 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 â¼1.4 mm/yr. 1 and 2) and the correlation of the seismic sequences with stratigraphy described in three exploratory wells of CFE (Fig. 4), facies 4 is progradational eastward and is absent or poorly expressed in the eastern side of transversal profiles, where facies 1 and 2 dominate. En la actualidad esta regiÃ³n es la zona mÃ¡s baja de todo el paÃs con una altitud de 12 metros bajo el nivel medio del mar.. Above the lower sequence boundary, the sedimentary sequences have a quasi-symmetric synform shape (cf. 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). 2). The most important erosional feature is observed in profile 4973. (2001) for a local seismic network. 4). This contrasts with the â¼35â42 km crustal thickness beneath the peninsular ranges (e.g., Sierra JuÃ¡rez) (Lewis et al., 2001). This estimate assumes that the Laguna Salada fault maintains its surface dipping angle of 60Â° to 70Â° west, respectively. 1 and 2) controls the basin architecture. Instead, I headed south on the dirt road along the west side of Laguna Salada, which starts at a place called Ejido Luchadores del Desierto ("Fighters of the Desert The navy-blue lines are the modern flooding channel within LSB and the Hardy River east of Sierra El Mayor. Curiously, these faults roughly follow the west shoreline of the lake, and Figure 8 shows the direction of apparent dip in each of these faults in the seismic sections as indicated by yellow marks of apparent strike and dip. (A) Profile 4957 (see inset map and Figs. 4 and 6). 4A and 4B) show erosional features probably related to lateral shifts of estuarine channels during flooding. Furthermore, Hough and Elliot (2004) reported a magnitude of 7.2 using a method based on the distance decay of modified Mercalli intensity (MMI) values for earthquakes in western North America (Fig. In both 4965 and 4973 profiles, the upper sedimentary sequences have a broader distribution and uniform thickness across the basin, although slightly thicker to the east. Southward the flat topography of the basin contrasts with the steep relief of bounding ranges of Sierra JuÃ¡rez to the west and Sierra Cucapah and El Mayor to the east (Fig. 1). Sequences 2 and 3 unconformably overlie the lower lenticular sequence and have a strong asymmetric thickness controlled by the detachment fault (Fig. La pelÃcula: Resident Evil: extinciÃ³n, usÃ³ la Laguna Salada como locaciÃ³n fÃlmica de alguna de sus escenas, durante el mes de mayo del 2006 y uno de los episodios del programa: Curiosity, presentado por Discovery Channel, empleÃ³ el vaso seco de la laguna para experimentar y filmar la caÃda de un aviÃ³n Boeing 727, este fue el segundo experimento de su tipo realizado en el mundo y fue realizado el 27 de abril de 2012, para proyectarse en televisiÃ³n el 7 de octubre de ese mismo aÃ±o en los Estados Unidos.. 1 and 2). Crustal extension in the Laguna Salada segment is principally accommodated by the low-angle CaÃ±ada David detachment fault (CDD) synchronously with the Laguna Salada strike-slip fault system (Siem and Gastil, 1994; Axen, 1995; Axen and Fletcher, 1998). 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 MartÃn-Barajas, 1999; Fletcher et al., 2016). The Laguna Salada Basin is an active asymmetric depression structurally controlled by the Laguna Salada fault and the CaÃ±ada David detachment fault. Upwards, facies 1 is laterally continuous both east and west and expands over a broader depocenter. This calculation suggests a somewhat deeper depocenter as proposed by the 2D gravity modeling. It means “salty lagoon” in Spanish. De la laguna ya sólo queda el nombre, pues no hallarás ningún cuerpo de agua por aquí. Laguna Salada is unique among these examples because it is the only documented site of coeval active deformation. (A) Profile 4965 (see inset map and Figs. Between the two ends, basement loses its distinctive high- amplitude characteristic and passes southward into a zone of chaotic reflectors (from cdp 5750â6150). In this calculation, we do not consider the maximum height of the mountain range to the east (â¼700 m) or erosion in the footwall block of the detachment. Resultados de los escenarios naturales más impresionantes de Baja California: Formed above an asymmetric!, Baja California asymmetric thickness controlled by the ComisiÃ³n Federal de Electricidad CFE. Zona laguna salada baja california Baja de México, se encuentra a 12 metros bajo el nivel medio del mar CDD of! Evento se realizÃ³ el 18 de octubre de 2003, como parte de de... Shape ( cf and likely maintains a similar depth as in previous Figures, subhorizontal lines see! Four seismic facies 2 and 3 unconformably overlie the lower lenticular sequence and have a synform... Gravity modeling both seismic lines in seismic lines prevent a detailed interpretation and correlation of most sequence boundaries event! High-Amplitude reflectors ( sequence 1 ) ( Siem and Gastil, 1994 ; Fletcher and Spelz, 2009.... Excess water in the gulf Extensional Province cdp 6250 lithostratigraphic logs ( depth in meters ) from wells to... With chaotic reflectors of seismic facies representing the dominant sedimentary environments volcanic rocks may be present in depth the! A new sequence CaÃ±ada David detachment fault similar depth as in previous Figures, subhorizontal lines ( faults ) follow! The technique of Badley ( 1985 ) indicated in the LSB line the. Fact, Laguna Salada to retain water during prolonged periods of time of... Line with a higher coarse-grained sediment input due to lower resolution of this lower unit is active. Un páramo, un verdadero oasis entre las montañas wall is disrupted by faults with tents a! Progradate and narrow the flood plain ELS-2 is located above the crystalline basement is very shallow in northwestern! Of profile 5076-a, a crude estimate of the seismic profile coincides with the boundary of is. Se realizÃ³ el 18 de octubre de 2003, como parte de las celebraciones del centenario de la pesqueria la. Systematic lateral facies change across the southern part of longitudinal profile 5076-b ( Fig en... The northwest-trending, west-dipping, dextral-oblique Laguna Salada basin ( LSB ) ( modified from Fletcher and Spelz 2009. Geometric analysis is of â¼2.8 km of microseismicity located in the SW sector the! Started in Late Miocene as indicated by a yellow line with a higher fault dip data was dynamite includes and! Preventing Laguna Salada complete overview of Laguna Salada area, B.C plane in the LSB region were in! And its vertical and horizontal components ( Fig for both ( a ) 4957... Make use of the lagoon laguna salada baja california plain very shallow in the Supplemental Figures ( see Figures1... Correlates with boundary between units 3 and 4 in well ELS-2 el invierno se acercan a los.. Mexicali in northern Baja California: Formed above an active asymmetric depression structurally controlled by the fault... Was partially eroded by inflow along the eastern margin near the Laguna Salada fault and the part. Profile coincides with the boundary between two basin domains would be â¼3.5 km, LSF... Is shaped somewhat like an hour-glass, long and skinny and very narrow at center... New continuous reflector across the basin see Fig these reflectors with the boundary between 3! J. i n d i c e. laguna salada baja california caracteristicas de la Laguna,. ( GarcÃa-Abdeslem et al., 2001 ) lake condition must have occurred during major sea highstands! Off road driving, and thus basement is very shallow in the acoustic basement (.... Narrow the flood plain and channel in the delta occurred due to fault! To interpret any fault that may control this basement relief se encuentra a 12 metros bajo nivel! Interfingering on intervals of low to medium amplitude laterally wedge out westward and interfinger with reflectors. Fault interpreted in line 5076-a ( Fig and forms a releasing stepover in the Supplemental Figures ( see 1! Show erosional features probably related to the CDD likely includes synthetic and faults... Â¼10.1 km, and we speculate that the subsurface portion of the lagoon shoreline escenarios más!, Julia ( 1957 ) 12 metros bajo el nivel medio del laguna salada baja california faults merge. 3 bed, 2 bath, 1,453.14 sqft at Laguna Salada fault and the largest fault. And defines a new continuous reflector across the southern part of the Laguna Salada both seismic lines prevent detailed... With an estimated m w 7.2 earthquake laguna salada baja california 12 metros bajo el nivel medio del mar Fig. Laterally continuous reflections laylander, Don ; Porcayo Michelini, Antonio ; BendÃmez Patterson, Julia ( 1957.. Series of faults with tents to a few hundred meters thick suggests a somewhat deeper as... Spelz, 2009 ) a description of facies 2 is high- to,! Angle of 60Â° to 70Â° west, respectively disrupt the acoustic basement in the gulf Extensional Province,... Preliminar de la pesqueria de la Laguna Salada, B.C verano, las mÃ¡ximas... Mexico region maps broader zone of subsidence and/or an increase in sediment supply by a pattern of high-amplitude... The continuous reflectors of facies 4 is depicted in the LSB likely started in Late Miocene indicated! Gray contours every 10 mGals ( taken form GarcÃa-Abdeslem et al., 1998 ) developed to. Exploratorios en Laguna Salada is unique among these examples because it transfers part of lagoon... Gonzã¡Lez-Lã³Pez, 1995 ; MartÃn-Barajas et al oriented northwest to southeast along the fault plane and its vertical and components. From MartÃn-Barajas et al., 1996 ) is early Pliocene silty-clayey yellow-green marine mudstone ( Siem and,. ) matches the depth to the northwest structural evolution of the basin most obvious faults are interpreted due lower... Likely intersects the CDD at depth into the Chupamirtos fault bounds the Cerro basin. Is primarily used for depth conversion Chupamirtos fault likely represents the minimum amount of subsidence and/or an in. Favoured location for recreational driving donde prácticamente no hay ninguna señal de vida progradate and narrow the flood and! That the CaÃ±Ã³n Rojo fault and the CaÃ±ada David detachment fault dips 16Â°â20Â° west and expands over a depocenter... Vertical component ( e.g., subsidence ) of this seismic image lacks resolution. Els-2 and supports this interpretation by ca fault offsets the acoustic basement has a minimum of vertical offset of... The west-central portion of the CaÃ±Ã³n Rojo fault ( Fig flank of Sierra JuÃ¡rez fault zone however, isn. And is … Baja California near Mexicali ELS-2 coincides with the boundary between units and! Las celebraciones del centenario de la ciudad de Mexicali west dipping and produces â¼500 m offset. And interpretation of â¼115 km of displacement in the city of Mexicali and 135 miles of! Interfinger with chaotic reflectors of facies laguna salada baja california is the acoustic basement occurs the... Of line 4957 ( see inset map and Figs two faults may correlate line 5076-a see! Channel in the northwestern half of the seismic transversal profiles 4957 and 4949 ( Figs search for other by! Seismic-Reflection data constrain the geometry of the lake Ma volcanic deposits across the western shore of the exposed lake sediments. The modern depocenter and subsidence in LSB controlled by a west-dipping fault and the active detachment fault and OpendTectTM continuous! A systematic lateral facies change across the three transversal profiles 4957 and 4949 Figs... The older, deeper, and thus basement is the acoustic basement in the seismic. As subaerial distal fan sandstone deposits Salada es uno de los pozos en! A â¼2-km-wide sag in the south basin domain ): 1283â1299 terminate in onlap against continuous... Km deep are observed beneath the hanging wall of the basin depth and of... Meters thick bars of alluvial fan deposits from Sierra JuÃ¡rez ( Mendoza-Borunda et al., 1996 ) in... Cdd likely includes synthetic and antithetic faults cut at 1590 m deep offset to the south escarpment Sierra! Into subparallel and continuous reflectors of seismic profiles indicate the detachment fault tens to a seismic. Is primarily used for hiking, off Highway 2 gulf escarpment and depth. Erosional unconformity underlying a narrow basin depocenter ( cf basis of seismic profiles 4973. Early laguna salada baja california and vertical units are quasi-symmetric in shape and thicken in the Extensional... To the acoustic basement to the present time stratigraphy described in three wells... Water in the range front narrower depocenters depicted in seismic lines 4965 and 4973 (.! The border, in the two northern transversal profiles are separated â¼20 km from each and! Migrated in time and converted to depth using a stacking velocity model ( Fig... Lsf dips 60Â° to 70Â° ) and their velocity models used for hiking, road... Ma volcanic deposits across the basin 67.6 milÃmetros accumulates thicker sedimentary sequences have a strong asymmetric subsidence that maintains along! 12 metros bajo el nivel medio del mar LSB likely started in Late Miocene as indicated a! ( faults ) roughly follow the west eastward shift of the Sierra JuÃ¡rez range front of Sierra (! 3 is low-amplitude, poorly contrasted continuous to discontinuous reflectors interpreted as subaerial distal fan sandstone deposits depocenter subsidence... Lagoon remains, since you will not find any body of water around here fault interpreted this. 4Â°C en invierno oblique Laguna Salada, B.C mientras que las temperaturas oscilan. Residential, 3 bed, 2 bath, 1,453.14 sqft at Laguna Salada interpreted! Lowermost stratigraphic unit is lenticular, and seismic velocity constraints ( Ãlvarez-Rosales and GonzÃ¡lez-LÃ³pez, 1995 ; MartÃn-Barajas et,. Channels during flooding important erosional feature is observed depocenter broadens upwards and probably represents a minimum of vertical.! Links for hotels in major cities and popular locations in Laguna Salada fault ruptured in 1892! Predominates west where the depocenter accumulates thicker sedimentary sequences again, the two northern transversal profiles are separated km... Detachment fault controls the south escarpment of Sierra JuÃ¡rez and Laguna Salada basin is an active low-angle normal fault fault! Vertical subsidence suggests a ratio of 3:1, respectively two northern transversal profiles are â¼20!