Journal of South American Earth Sciences最新文献

{"title":"New evidence for superposition of two major Precambrian orogens in southeast Brazil","authors":"Pedro Costa Furtado , Rudolph Allard Johannes Trouw , Rodrigo Peternel Machado Nunes , Marcos Vinícius Fontainha , Mauro Cesar Geraldes , Rodrigo Vinagre Cintra da Costa , Rafael Cardoso De Moraes Telles","doi":"10.1016/j.jsames.2024.105149","DOIUrl":"10.1016/j.jsames.2024.105149","url":null,"abstract":"","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105149"},"PeriodicalIF":1.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic signature of deep pit ovens from Paquimé, ceremonial center of the Casas Grandes culture (Northern Mexico)","authors":"Avto Goguitchaichvili ,&nbsp;Eduardo Pío Gamboa Carrera ,&nbsp;Mabel Galván ,&nbsp;Juan Morales ,&nbsp;Rubén Cejudo ,&nbsp;Miguel Cervantes ,&nbsp;Vadim Kravchinsky ,&nbsp;Rafael García-Ruiz ,&nbsp;Francisco Bautista ,&nbsp;José Luis Punzo","doi":"10.1016/j.jsames.2024.105190","DOIUrl":"10.1016/j.jsames.2024.105190","url":null,"abstract":"<div><div>The Casas Grandes culture in Northern Mexico and Southwest United States has been characterized by its impressive architecture - unique to desert cultures, with houses and constructions of up to four floors built by adobe. In this study, we report an integrated rock-magnetic and archaeomagnetic study from Paquimé archaeological site, considered as an outstanding testimony of the relationship between the cultures of North America and Mesoamerica. The <em>In Situ</em> structures of Paquimé archaeological zone were magnetically analyzed for the first time. Four up to 2.6 m deep Pit Ovens, commonly used for agave cooking, were sampled. 78 specimens were subjected to stepwise alternating field demagnetizations to retrieve characteristic remanence archaeodirections. The great majority of samples yielded evidence of essentially stable, single component remanent magnetization carried by the end members of titanomagnetite solid solutions (almost magnetite phase). Hematite grains apparently also co-exist, but their contribution in total thermoremanence is minor. The archaeomagnetic dating, based on mean declination and inclination, was performed using the global geomagnetic models and the available regional Paleosecular Variation Curves available for Mesoamerica. Additionally, SW United State paleosecular variation patterns from Four Corner region was also considered. The most probable age interval for one of the studied ovens (around 940 AD) is out of Paquimé’s main occupation phase between 1200 and 1450 AD. The age estimation for the PH1 pit oven, around 1150 AD, could be located near the limit of the beginning of the <em>Medio</em> Period. Remained two analyzed ovens yielded up to three possible ages distributed around 1100, 1320 and 1480 AD. Pit Ovens studied here, were long time considered to correspond to same time interval, while these new results attest that these combustion structures encompassed almost six centuries in agreement with the historical fact that the city of Paquimé was abandoned before the arrival of the Spaniards.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105190"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accounting for organic carbon and total nitrogen stock variability on a stony soil slope under a seasonally dry tropical forest","authors":"Renato Francisco da Silva Souza ,&nbsp;Victor Junior Lima Felix ,&nbsp;Vania da Silva Fraga ,&nbsp;Bruno de Oliveira Dias ,&nbsp;Rodrigo Santana Macedo ,&nbsp;Jhony Vendruscolo ,&nbsp;Salomão de Sousa Medeiros ,&nbsp;Jhonatan Rafael Zárate-Salazar ,&nbsp;Francilel Arruda Bezerra ,&nbsp;Milton Cesar Costa Campos","doi":"10.1016/j.jsames.2024.105184","DOIUrl":"10.1016/j.jsames.2024.105184","url":null,"abstract":"<div><div>Stony soils are typical of the Brazilian semi-arid region and display specific traits that lead to substantial pedological variability. This hinders the effective quantification of stocks of soil organic carbon (SOC) and total soil nitrogen (TSN). The current study aimed to assess the variability of SOC and TSN stocks in a stony soil under Caatinga. In the topsoil, the SOC and TSN stocks were affected by rock fragments and clay contents. In the subsurface (&gt;20 cm) layer, these stocks were influenced by P, SOC, and TSN content. These results confirm that SOC and TSN stocks are controlled by physical and chemical protection in topsoil and subsoil, respectively. The nugget/sill effect ratios indicated moderate carbon and nitrogen stock spatial dependence in the 0–10 and 10–20 cm layers, besides a strong dependence in the others. Consequently, a minimum distance of 73-m between sampling points is recommended to ensure sampling independence aiming for assessing SOC and TSN stocks in stony soil layers. This important difference between depths in local-scale can help to improve the accuracy of numerical models of carbon cycling in tropical dry forests.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105184"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holocene landscape changes in response to sea level oscillations and agricultural intensification in a coastal plain of southeastern South America","authors":"A.S.P. Avila ,&nbsp;S.R. Bottezini ,&nbsp;D. Diniz ,&nbsp;C. Bueno ,&nbsp;L. Perez ,&nbsp;G. Martínez de la Escalera ,&nbsp;C. Piccini ,&nbsp;A. Leonhardt ,&nbsp;F. García-Rodríguez ,&nbsp;J. Weschenfelder","doi":"10.1016/j.jsames.2024.105185","DOIUrl":"10.1016/j.jsames.2024.105185","url":null,"abstract":"<div><div>This study identified landscape changes in response to variations in mean sea level (MSL) and anthropogenic intervention, from the Early to Late Holocene in Southestern South America. Ananalysis based on palynology and sedimentary bacterial DNA from two sediment cores from the Patos-Mirim System (PMS) is introduced for the first time, to achieve an integrated paleoenvironmental and ladscape reconstruction. The data indicated an east-west migration of the freshwater and forest environments set in the lowlands during the transgressive period (6000–5000 cal yr BP) and an increase in external total biomass input during this MSL rise. A consolidated vegetation onset was inferred, especially of forest environments, after the Holocene Climatic Optimum (5000 cal yr BP). During the last century, landscape changes especially associated with anthropogenic factors were clearly identified from the palynological assemblages. That is, an alternation between Poaceae and Cyperaceae, the first occurrence of <em>Pinus</em> spp. and an increase in the influx of herbs and trees flagged the increase in cultivated areas due to the agricultural and agroforestry intensification. Extreme values of palynological influx appear to be a good proxy for the impact of <em>El Niño</em> events on the sedimentary record, which were associated to increased precipitation. The study also clearly demonstrates the high environmental stress generated by human activities, e.g. loss of plant diversity and changes in the bacterial abundance due to the higher agrochemicals input.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"148 ","pages":"Article 105185"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of geoid models for geopotential values determination in Mexico'S continuous monitoring network","authors":"Ana Isela Vidal-Vega ,&nbsp;Manuel E. Trejo-Soto ,&nbsp;Claudia N. Tocho ,&nbsp;Rosendo Romero-Andrade ,&nbsp;Karan Nayak","doi":"10.1016/j.jsames.2024.105192","DOIUrl":"10.1016/j.jsames.2024.105192","url":null,"abstract":"<div><div>The requirements of the reference systems related to the vertical part are aimed at adopting a global height system that allows taking advantage of the development of satellite technology that provides terrestrial data with higher quality. Due to this need, the International Association of Geodesy (IAG) has proposed the realization and implementation of the International Height Reference System (IHRS), based on geopotential numbers obtained from the gravity potential difference at a point on the Earth's surface (W(P)) referred to the geoid (W₀), whose value adopted by convention corresponds to 62636853.4 m²s^-2. Nowadays, efforts are underway worldwide to materialize this system. Considering this, the present work entails the analysis of information gathered from SIRGAS continuous monitoring stations in Mexico: MTY2, IDGO, INEG, MERI, and ICAM, to estimate its gravity potential from sufficiently precise geocentric coordinates and absolute gravity values, which when combined with heights derived from geoid models, allows obtaining a modern height system such as the IHRS. The analysis aims to evaluate the feasibility of estimating the gravity potential at the stations, by using precise geocentric coordinates and absolute gravity values which when combined with high-resolution geoid models such as EGM2008, GGM10, EIGEN6C4, XGM2019e_2159, SGGUGM2, and the xGEOID20B, to implement a modern height reference system in Mexico; as well as to contribute to the International Height Reference Framework (IHRF), which in its latest version only includes the MERI station, located in Mérida, Yucatán. Therefore, we consider that for their characteristics the stations analyzed can be included to densify the frame in the implementation of the system. The results show the differences in gravity potential in the different regions of the country, reinforcing the need to consider more reference stations. Additionally, benchmark points close to the selected stations were analyzed to determine the reference potential value of the GGM10, with which it was also possible to analyze the behavior between the observed geoid and the different geoid models, toward the modernization of the official height system, which is based on orthometric heights called NAVD88, which shows us the differences between the geoid observed with the official height system and the analyzed models. Finally, the study examines the consistency of the calculated orthometric heights with geopotential numbers derived from the different geoid models.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"148 ","pages":"Article 105192"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geology and geochronology of the El Peñón granitic pluton: A contribution to the famatinian magmatic evolution in the Sierra de San Luis, Argentina","authors":"Daiana E. Olsen ,&nbsp;Augusto F. Morosini ,&nbsp;Ariel E. Ortiz Suárez ,&nbsp;Alina M. Tibaldi ,&nbsp;Esteban M. Crespo","doi":"10.1016/j.jsames.2024.105188","DOIUrl":"10.1016/j.jsames.2024.105188","url":null,"abstract":"<div><div>The El Peñón pluton is a peraluminous granite located in the northeastern sector of the Sierra de San Luis. According to its textural and mineral variations two endmember facies have been distinguished along it: a coarse-grained muscovite-bearing facies, and a fine-grained biotite-bearing facies. Field relationships aligned with mineralogical and geochemical compositions, allow us to establish an anatectic origin for this pluton. Regarding the inherited zircon ages, the provenance area of the metasedimentary source could be linked to the orogenic systems of Western Gondwana. The analysis of the internal structure of the intrusive body related with the structural arrangement observed in the country rocks indicates a syn-kinematic emplacement of the igneous body with respect to the main deformational event described in the Sierra de San Luis, which has been assigned to the closure of the Famatinian arc. New U-Pb (LA-ICP-MS) zircon ages constrain the emplacement/crystallization age of the El Peñón granite within the time lapse between ∼470 and 460 Ma. The geochronological data presented here, together with geochemical and structural analysis, enables us to correlate the origin of the El Peñón pluton and the deformation that occurred during its emplacement with the Famatinian Orogeny. Thus, these results allow us to rule out the presence of Pampean magmatism in the Sierra de San Luis but also establish a new absolute age for the main deformational event of the range.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105188"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142446276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early Paleogene alkaline magmatism in the Subandean Ranges of Jujuy Province","authors":"Alba Cristina Muñoz Dada ,&nbsp;Guadalupe Maro ,&nbsp;Pablo Jorge Caffe ,&nbsp;Juan Pablo Villalba Ulberich ,&nbsp;Diego Fracchia","doi":"10.1016/j.jsames.2024.105189","DOIUrl":"10.1016/j.jsames.2024.105189","url":null,"abstract":"<div><div>The Zapla Range (Jujuy province) represents the southern edge of the central Andean Subandean Ranges in Argentina. In the northernmost area of the Zapla Range, basaltic rocks are interbedded in the Mealla Formation. These volcanic units form part of the post-rift magmatism of the Salta rift basin, which mainly focused on the Lomas de Olmedo sub-basin to the east. In this paper, six of these basaltic occurrences are characterized on the basis of new geological, petrographic and geochemical data, in order to explore their emplacement, petrogenesis and possible tectonic setting during rift evolution. Peperites in the upper contact of sills evidence the interaction between basalts and unconsolidated or poorly consolidated wet sediments. This implies that there was concomitance between sedimentation and subsurface magma emplacement, suggesting a Paleocene age for the magmatic event according to zircon U-Pb data available for Mealla Formation rocks. Other basaltic units show hipocrystalline textures and lack peperites at the top, which points to their extrusive nature. Additionally, some of these lava flows are spatially associated with pyroclastic deposits that reveal the occurrence of explosive hydrovolcanic eruptions. The study rocks are classified as alkaline basalts and basanites with high Mg# and Ni- and Cr-rich compositions, close to primitive magmas. They show affinity with continental intraplate settings. The analyses of Ba/Nb, Nb/La, (La/Yb)_N, (La/Sm)_N, (Gd/Yb)_N and (Dy/Yb)_N ratios, as well as normalized trace and rare earth element patterns, suggests a genesis by low degrees of partial melting of a residual garnet-bearing mantle source. Therefore, basalts from this part of the Subandean Ranges evidence a magmatic episode probably linked to an extensional reactivation stage of the Salta Group rift system in the Lomas de Olmedo depocenter during the Paleocene (∼60 Ma).</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105189"},"PeriodicalIF":1.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Serra Negra granites as a record of Tonian rifting within the Sergipano Orogenic System, NE Brazil","authors":"Rayane Gois de Lima ,&nbsp;Fábio Santos Pereira ,&nbsp;Maria de Lourdes da Silva Rosa ,&nbsp;Herbet Conceição","doi":"10.1016/j.jsames.2024.105180","DOIUrl":"10.1016/j.jsames.2024.105180","url":null,"abstract":"<div><div>The Serra Negra batholith (940 ± 7 Ma) is one of the most important intrusions related to the Cariris Velhos event (0.9–1.0 Ga) in the southern Borborema Province, NE Brazil. This body crops out as discontinuous slices tectonically intercalated with metasedimentary sequences of the Marancó Domain in the northwestern segment of the Sergipano Orogenic System along the Sergipe and Bahia states. Here, we report new whole-rock geochemical and U-Pb geochronological data on the Tonian Serra Negra granites to elucidate the mechanisms of magma generation and differentiation and advance the understanding of the Cariris Velhos event in the Borborema Province. The Serra Negra intrusion is composed of granites with a monotonous major mineralogy of K-feldspar, plagioclase, quartz, biotite, and rare muscovite. The accessory phases include titanite, zircon, apatite, allanite, fluorite, thorite, xenotime, ilmenite, and magnetite. Most of the exposed area is now converted into augen-gneisses, with localized occurrences of isotropic, porphyritic granites preserving almost their entire igneous features. Granites from both facies are weakly metaluminous to peraluminous and show calc-alkalic to alkalic affinities, with high FeO∗/(FeO∗+MgO), SiO₂, and Na₂O + K₂O. The augen-gneisses have high HFSE and REE abundances, with significant Eu, Ba, and Sr depletions, akin to A-type granite suites worldwide. Otherwise, porphyritic granites are characterized by relatively Ba and Sr-enriched compositions, along with lower contents of HFSE and REE. The complementary geochemical behavior between augen-gneisses and porphyritic granites suggests that the latter represents partial cumulates of the parental rhyolitic magma, whose extraction led to the highly evolved composition recorded by augen-gneisses. Geological and geochemical evidence indicates that Serra Negra A-type magmas were generated by the partial melting of calc-alkaline granitoids under low-pressure conditions triggered by underplated basaltic magmas in an extensional environment. Taking into account that granite emplacement was contemporary with well-documented rifting episodes in the São Francisco-Congo craton, we interpret the Serra Negra batholith as a record of an attempt to break up the basement of the Borborema Province.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"148 ","pages":"Article 105180"},"PeriodicalIF":1.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vertebrate paleoburrow as a seasonality indicator in early Cretaceous Três Barras formation (Brazil)","authors":"Caio César Rangel ,&nbsp;Heitor Francischini ,&nbsp;Luciano Alessandretti ,&nbsp;Lucas Veríssimo Warren ,&nbsp;Beatriz Christofoletti ,&nbsp;Daniel Sedorko","doi":"10.1016/j.jsames.2024.105183","DOIUrl":"10.1016/j.jsames.2024.105183","url":null,"abstract":"<div><div>Vertebrate burrows serve as windows into the past, revealing the activities of various organisms and providing clues about their paleoenvironmental conditions. This study focuses on a vertebrate paleoburrow from the Três Barras Formation, Minas Gerais state, southeastern Brazil, aiming to detail and reconstruct aspects of the paleoclimatic conditions that acted in this area during the early Cretaceous within a predominantly eolian paleoenvironment. Through detailed analysis of the sedimentary facies and morphological examination of the burrow, this study suggests that the structure was likely produced by lungfish or lizards. It is located within proximal crevasse splay deposits interbedded with fine floodplain sediments, indicating periods of flooding in a meandering fluvial setting that developed in the marginal areas of the eolian system of the Três Barras Formation. Comparison with other paleoburrows from neighboring basins further enhances our understanding of the paleoenvironmental conditions during the early Cretaceous Period. These findings reinforce evidence of seasonality and suggest a period of intense humidity during the deposition of the Três Barras Formation, which had previously been interpreted as exclusively aeolian.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105183"},"PeriodicalIF":1.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution and hydro-stratigraphy of the coastal aquifer in Garopaba/SC: Interpretation from georadar and tubular wells","authors":"Gabriel Barbosa Drago,&nbsp;Maria Luiza Correa da Camara Rosa,&nbsp;Pedro Antonio Roehe Reginato,&nbsp;Mariah Xavier Rocha","doi":"10.1016/j.jsames.2024.105182","DOIUrl":"10.1016/j.jsames.2024.105182","url":null,"abstract":"<div><div>This work analyzes the geological evolution of sedimentary deposits in the coastal aquifer of Garopaba, south Brazil, using ground penetrating radar (GPR) and data from tubular wells. The aquifer is localized in the coastal plain, where Quaternary lagoon-barrier environments are set between the Precambrian crystalline mountains and the sea. Over ten tubular wells are scattered in urbanized areas, which highlights the vulnerability of the unconfined, granular shallow aquifer. The results show that the aquifer has lithologic units of local scale. Tubular well data show the basal limit of the aquifer overlying clayey layers between 30 and 40 m deep and intercalation of sand layers up to the surface, mostly fine to very fine sand, with metric thickness, secondary lenses of clay and minor occurrence of gravel. The radarfacies interpretation shows fluvial-estuarine deposits as a local hydrostratigraphic unit, with lateral accretion bars filling a NE-axis paleochannel. The basal surface of the channel is interpreted as the sequence boundary surface of the lagoon-barrier systems III (upper Pleistocene) and IV (Holocene). The geological evolution of the aquifer is related to the upper Pleistocene marine regression (120–18 ka), that caused the aerial exposure of the continental shelf, and the development of complex drainage channels, which were superimposed during the Holocene transgression by lagoon-barrier IV deposits. After the post-glacial transgression, the lowering of the RSL to the current level promoted the silting of part of the lagoon system by continental sedimentation and aeolian deposits composing the surface.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105182"},"PeriodicalIF":1.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}