Francisco José Lobo

Francisco José Lobo
Instituto Andaluz de Ciencias de la Tierra · Marine Geoscience

PhD

About

153
Publications
30,113
Reads
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3,372
Citations
Citations since 2016
46 Research Items
1654 Citations
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
2016201720182019202020212022050100150200250300
Introduction
My research lines focus around the study of the origin and development of continental margin sedimentary systems by geomorphological, stratigraphic (seismic and sequence stratigraphy) and sedimentological approaches. Such systems include: (a) shelf and shelf-margin deltas and muddy depocenters in high-supply margins; (b) non-deltaic sediment wedges and sand banks in current-controlled margins; (c) mixed deep depositional systems, with interactions between contouritic, turbiditic and fluid escape features. These studies are undertaken in different geographic areas, such as the Gulf of Cadiz, the Strait of Gibraltar, the Alboran Sea, the southeastern Iberian margin, the southwestern Brazilian margin and the Scotia Sea, Antarctica.
Additional affiliations
September 2005 - June 2012
University of Granada
Position
  • Research Associate
Description
  • Teaching PhD course: Paleoceanografía y cambio global: análisis integrado del registro sedimentario marino
January 2004 - present
Instituto Andaluz de Ciencias de la Tierra
Position
  • Researcher
September 2002 - December 2003
Universidade do Algarve
Position
  • Marie Curie Individual Fellowship
Education
December 1995 - July 2000
Universidad de Cádiz
Field of study
  • Marine Geology
July 1994 - November 1995
Universidad de Cádiz
Field of study
  • MSc in Marine Geology
October 1989 - June 1994
Universidad de Cádiz
Field of study
  • Marine Science

Publications

Publications (153)
Article
The combination of oceanographic processes and a negligible fluvial terrestrial sediment contribution makes the Santos Basin margin (southwestern Brazil) a unique environment for studying thew morphological imprint of bottom currents on the seafloor morphology. We divide the seafloor into four domains: outer shelf, upper, middle, and lower slope, b...
Article
Multibeam bathymetric imagery and acoustic sub-bottom profiles are used to reveal distribution patterns of sub-surface sedimentation in Dove Basin (Scotia Sea). The goals of the study are to determine the imprint of the inflow of deep Antarctic water masses from the Weddell Sea into the Scotia Sea, to establish the factors driving the styles of con...
Chapter
Full-text available
A marine hazard is a potentially damaging event, phenomenon or activity in the marine environment that may cause loss of human life, social and economic disruption or environmental degradation. In the last 30 years, natural and human-induced hazards have caused over 1.6 million victims and the economic losses average 300 thousand million dollars pe...
Article
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The variability of sedimentation patterns and processes driven by late Quaternary glacial-interglacial paleoclimatic and paleoceanographic changes are investigated in Ona Basin, southwestern Scotia Sea. The interest of this area lies in the fact that the nearby Antarctic Peninsula has recorded extreme climatic variability, and the Drake Passage-Sco...
Article
The scarcity of paleo-records from the Antarctic Peninsular region of the Southern Ocean hinders our understanding of the timing of the opening of Drake Passage, specifically in the region of the South Orkney Microcontinent (SOM) and Powell Basin, between the Scotia and Antarctic plates. At Ocean Drilling Program (ODP) Hole 696B, SOM sediments reco...
Article
Mud depocenters (MDCs) are common elements on modern continental shelves and act as a major shallow-marine sink for fluviogenic material. These most proximal depocenters, thus, play a major role in material cycling and carbon availability on global and regional scales, though individual formation history, dependence on external forcing mechanisms,...
Chapter
The seafloor of the Alboran Sea reflects its complex tectonic, sedimentary, and oceanography dynamics as a consequence of the geological context, involving interaction between the Eurasian and African plates, and oceanographic context, as it is where the Atlantic and Mediterranean waters meet. Their physiography has a semi-enclosed configuration ch...
Article
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This study examines the role of deep pockmarks in acting as natural sediment traps. Multibeam bathymetry, single-channel seismic and sediment samples data were used for describing the morphology of pockmarks as well as the nature of sediments inside and outside these depressed features, in an area of Santos Basin (SW Atlantic upper slope), dominate...
Article
This study aims to investigate the spatial variability of surficial sedimentation processes on a large sector of the Brazilian shelf by using echo-character mapping. To reach this goal, almost 3200 km of high-resolution seismic lines collected with a 3.5 kHz Chirp source are compared with surficial sediment-related distribution maps. Based on seism...
Article
Sedimentological, geochemical and benthic foraminiferal proxies were used to interpret changes of depositional environments in a mud entrapment inside the Guadiana River paleo-valley, northern Gulf of Cadiz, to understand the temporal variability of fluvial flooding events and to detect patterns of latitudinal climatic variability in western Iberia...
Article
A morphological and seismic-stratigraphic analysis of the Gulf of Cadiz area near the Strait of Gibraltar is presented in this work, focused on the sedimentary evolution of the upper and proximal middle-continental slope since the Mid-Pleistocene. Based on the analysis of seismic reflection profiles and swath bathymetry data, this work analyses the...
Article
On continental margins, the upper slope to shelf break environment forms a critical region where sediment supply, hydrographic activity and gravitational processes determine how and when sediments are partitioned between the shallow- and deep-marine realm. On the SW Iberian margin, relatively few studies have addressed the dynamics of this region,...
Chapter
Full-text available
According to the results of geomagnetic, studies primarily made by Spanish research vessel “Hesperidas”, in the region of the Drake Strait linear magnetic anomalies revealed. Modeling of linear magnetic anomalies within the frame of the lithospheric plates tectonics concept allowed to restore C3–C17 chrones. Analysis of the bottom geochronology and...
Article
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Ona Basin, the westernmost oceanic basin in the southern Scotia Sea, is affected by the opposite flows of Circumpolar Deep Water (CDW) and Weddell Sea Deep Water (WSDW); thus, it represents a key location for exploring seafloor morphologies influenced by bottom currents. The present study aims to capture the spatial arrangement of recent subsurface...
Article
Full-text available
Recently acquired bathymetric and high-resolution seismic data from the upper slope of Santos Basin, southern Brazilian margin, reveal a major geomorphological feature in the SW Atlantic that is interpreted as a carbonate ridge - the Alpha Crucis Carbonate Ridge (ACCR). The ACCR is the first megastructure of this type described on the SW Atlantic m...
Article
Over the past decades, the northern Gulf of Cadiz has been the focus of a wide range of late Quaternary seismic and sequence stratigraphic studies, either addressing the slope contourite depositional system (CDS), or the development of the continental shelf. Yet, high-resolution seismic data bridging between these domains and age information have r...
Article
In southeastern Brazil, the Serra do Mar coastal mountain range blocks the sediment influx from arriving at a ca. 1,500 km long continental margin comprising Santos and Pelotas basins. Despite this deprivation, the margin accumulated a ca. 1 km thick sedimentary succession since the Mid‐Miocene. Examination of seismic reflection and oceanographic d...
Article
Full-text available
In this work, we analyze the origin, evolution, and recent sedimentation of the Rio Grande Terrace (RGT), the most prominent upper slope terrace of the SW Atlantic. We gathered data from deep to shallow seismic, echo-sounding and surface sediments in order to recognize the role played by the geological inheritance, the sediment origin, and the pres...
Article
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Natural and human-induced seabed sediment disturbances affect wide areas of the global coastal ocean. These recurrent to chronic disturbances mobilize significant amounts of material, including substances that have the potential to significantly harm the environment once re-released. This very challenging issue is difficult to deal with if sub-surf...
Article
Diapir piercement through the ocean floor marks the final stages of a dynamic migration path. Once exhumed, a diapir extrudes from the seafloor, placing an obstacle for the flow of ocean bottom currents. While the hydrodynamic response of the flow has been previously studied, the detailed depositional and weathering modifications involved in the pi...
Article
The structure of the sediment sequence of the Scotia Sea is the basis for reconstructing the geological history of the development of its floor in the late Quaternary. One of the most important elements of the floor of the southern Scotia Sea is the Scan Basin, the formation of which played a substantial role in the breakup of the American–Antarcti...
Article
Metal/Ca ratios and their corresponding enrichment factors (EFs) in bulk sediment samples collected at a mixed carbonate-siliciclastic continental slope setting with an extensive pockmark field were measured and analyzed to find evidence of lateral differences in the redox potential and recent seepage activity inside the pockmarks. The analyzed rat...
Article
Full-text available
Clinoform depositional features along the Iberian Mediterranean margin are investigated in this study, with the aim of establishing the causes of their varied shapes and other characteristics. We have analyzed the broad-scale margin physiography and seismic stratigraphic patterns based on high-resolution bathymetric data and previously interpreted...
Article
The northern shelf of the Strait of Gibraltar adjacent to Camarinal Sill, defined here as the Cape Paloma continental shelf, has been investigated by analyzing a set of geophysical data including multibeam bathymetric images, a side-scan sonar mosaic and high-resolution seismic profiles, and the simulation of water-mass circulation patterns along t...
Article
An integrated approach combining swath bathymetry, high-resolution seismic reflection and seabed sediment sampling was performed to characterize a field of sand ridges on the Murcia continental shelf in the western Mediterranean Sea. The aim of this work was to improve knowledge about the formation, evolution and present-day dynamics of these bedfo...
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This study investigates two bedrock-controlled palaeo-coastal embayments on the Barbate Platform off Cape Trafalgar near the Strait of Gibraltar (Gulf of Cadiz shelf, SW Iberian Peninsula), aiming to reveal their infilling dynamics and the influence of rocky outcrops on shallow-water hydrodynamics and sediment transport. The approach relies on deta...
Article
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The main aim of this study is to explore the spatial patterns of the shelf-scale erosional unconformity related to the last glacial maximum (LGM), particularly in terms of the role of underlying geology and the presumed primary influence of sea-level changes. This involved a detailed mapping of the most recent and widespread erosional shelf surface...
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São Sebastião Island (SSI) marks the latitudinal boundary between two sedimentological and geochemical provinces in the São Paulo Bight, an arc-shaped sector of the southeastern Brazilian Shelf. The island is separated from the continent by the narrow, deep São Sebastião Channel (SSC). A relatively thick sediment wedge—the São Sebastião Wedge (SSW)...
Article
The structure of sediments in the Scotia Sea is used as a basis for reconstructing the geological history of its bottom in the Late Quaternary. The Scan Basin is one of the main elements of the topography of the southern Scotia Sea. Its formation played a considerable role in the fragmentation of the continent, which included the Bruce and Discover...
Chapter
Fields of submarine undulations occurring over prodeltaic slopes may be caused in some circumstances by the imprint of high-density sediment flows (i.e. hyperpycnal flows). This is the case of numerous Mediterranean settings, where marked seasonal climates and abrupt inshore physiography are conducive to the generation of these flows. In this contr...
Chapter
Undulation fields found on Mediterranean prodeltaic slopes usually display sub-surface precursory features recognized through seismic profiling and sediment core data. In this contribution we examine the stratigraphic patterns of sub-surface undulations occurring in wedge-shaped Holocene deposits that are in agreement with the episodic activity of...
Chapter
Multibeam swath bathymetry, high-resolution seismic data and sediment samples were used to characterize a field of sand ridges and subaqueous dunes on the outer Murcia continental shelf (western Mediterranean Sea). Sand ridges are 1.5–3 m high and show a predominant E-W orientation oblique to the present-day shoreline. High-resolution seismic data...
Conference Paper
Full-text available
São Sebastião Island (SSI), located in the São Paulo Bight, southeastern Brazil, represents a major boundary between the shelf to the south, mainly covered by a muddy recent depocenter derived from the supply of de la Plata River, and the shelf to the north, where sediment distribution exhibits a patchy pattern, with variable amounts of sands and m...
Conference Paper
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Recent sedimentation patterns of presumed Quaternary age in the Scotia Sea appear to be dominated by contourite drifts generated by the influence of the Antarctic Circumpolar Current (ACC), the Weddell Sea Deep Water (WSDW) and/or the interaction between both water masses. Intercalated between stratified contourite deposits, chaotic lenses interpre...
Chapter
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An analysis of small-scale morphologies developed in the different domains of submerged deltas (topset, foreset and bottomset) on the continental shelf of the southeast of the Iberian Peninsula is performed in this paper. The aim of the study is to understand the genetic processes, in particular the role played by the fluvial flows. To achieve this...
Conference Paper
Antarctica and the Southern Ocean play key roles in the Earth and climate system, providing a significant insight into the processes that govern global-scale change. Under this view, the Antarctic region is considered as one of the world’s most important natural laboratory. The interaction between climatic, oceanographic and tectonic processes invo...
Conference Paper
Full-text available
The construction and evolution of submarine deltaic deposits are influenced by a combination of allogenic factors , such as fluvial flow (Q), and autogenic factors, such as basin slope (BS). Numerical simulations of turbidity currents are used to propose a morphodynamic model that quantifies the effect of both the slope and river input variations o...
Conference Paper
The interplay between sediment supplied by several rivers, a complex ocean current system and a fluctuating sea level control the depositional architecture of transgressive and highstand sediment depocenters (“mudbelts”) on the continental shelf in the northeastern portion of the Gulf of Cadiz. Previous investigations relied almost exclusively on s...
Chapter
Full-text available
Análisis de imagen para la identificación de objetos en filtros procedentes de las plumas de turbidez Image analysis to identify objects in filters obtained from turbidity plumes Abstract: The study of turbidity plumes developed in front of the river mouth, have an increasing scientific interest due to its contribution to infralittoral sediment tra...
Chapter
Full-text available
The construction and evolution of submarine deltaic deposits are influenced by a combination of allogenic and autogenic factors. Numerical simulation of turbidity currents are used to propose a morphodynamic model that quantifies the effect of the slope and river input variations on delta development/construction for the case of mountainous rivers...
Chapter
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Clinoforms constitute the basic building elements of continental margin growth. Submarine clinoforms are composed of three geometric elements: topset, foreset and bottomset. This study focuses on the determination of the distal termination of submarine deltaic clinoforms by using morphometric criteria and subsequent validation with stratigraphic, s...
Chapter
Full-text available
The evolutionary stages of the submarine delta off the Adra River are investigated in this study, under the context of climatic fluctuations entangled with increasing human activities and interventions in the drainage basins and adjacent shores during the Middle to Late Holocene. To achieve that goal, we used an extensive database comprising a set...
Conference Paper
Full-text available
The São Sebastião Island, located in the Bight of São Paulo, southeastern Brazil, holds a kilometric scale deposit whose distribution, internal structure and age are still unknown. Due to its geographical position, it is believed that the deposit genesis is the result of the combined influence of the Brazil Current to the north, and the sediment pl...
Conference Paper
Full-text available
Progradational sedimentary bodies are common features of inner shelves worldwide. These features are sandy bodies deposited beyond the shoreface in steep inner shelves, and usually present an undulating geometry. They can affect the wave propagation patterns and hence, the sediment dynamics and shoreline morphology. However, few studies have analyz...
Article
Full-text available
Here we present a synthesis of bedforms and sediment types on the shelves surrounding the Iberian Peninsula and the Balearic Islands, after the integration several pieces of bathymetric, morphological and sedimentological datasets. The Iberian and Balearic shelves are divided into segments according to the largescale margin configuration, fluvial s...
Article
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We present a synthetic view of continental-shelf evolutionary patterns around the Iberian Peninsula, focusing on proposed sequence stratigraphy interpretations and attempting a comparison between Atlantic- and Mediterranean-type shelf-margin constructions. Most of the studied shelves show a dominance of regressive to lowstand deposition through suc...
Article
The Poniente Basin lies in a folded sector located at the boundary between the eastern Betic Cordillera and the Alborán Sea. We reconstruct its 3D geometry combining depth-migrated 2D seismic reflection sections with borehole and surface structural data. The folds have been interplaying with sedimentation since late Miocene time. Growth strata allo...
Article
Data on the high heat flow, active volcanism, and extensional folding, in combination with modeling of the gravity and magnetic anomalies and earthquake focal mechanisms, indicate that the Bransfield strait floor represents a zone of lithosphere extension forming in the Antarctic Peninsula. The most important structural element of the strait floor...
Conference Paper
Full-text available
Submarine canyons and progradational sedimentary bodies are common features of inner shelves worldwide. Nevertheless, few studies have analyzed the relationship between the sediment dynamics, the coastal evolution and the characteristics of the adjacent shelf in wave-dominated coasts. This work presents a study that correlates the coastal evolution...
Article
A comprehensive analysis of small deltaic environments linked to short, mountainous, and seasonal fluvial systems in the northern shelf of the Alboran Sea was undertaken in order to define the controlling parameters of the geomorphological variability. The database includes multibeam and backscatter imagery, surficial sediment samples, and high-res...
Chapter
Full-text available
The continental shelves fringing the Gulf of Cádiz are shallow-water environments of high scientific interest as they record the complex interplay between competing sedimentary, tectonic and oceanographic processes. These shelves receive the contributions of fluvial sources of varying significance, evolving laterally to shelf segments dominated by...
Article
Sedimentary processes in small, isolated oceanic basins that form adjacent to continental margins but detached from continents remain poorly understood. This work describes two such basins located in the southern Scotia Sea, the Protector and Pine basins. We analysed multichannel seismic profiles to interpret morphostructural features and stratigra...