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all geography including DSDP/ODP Sites and Legs
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Africa
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Primary terms
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Africa
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Central Africa
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Angola
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Cuanza Basin (1)
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Southern Africa
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Namibia (1)
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Asia
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Arabian Peninsula
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Oman (2)
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China
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Sichuan Basin (1)
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Yunnan China (1)
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Mongolia (1)
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Tertiary
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Chattian (1)
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Shahejie Formation (1)
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Central America
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Belize (1)
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Chordata
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Protista
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Jurassic
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Triassic
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Sr-87/Sr-86 (7)
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1-20 OF 109 RESULTS FOR
Lagoa Vermelha
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Journal Article
Decompositional processes of microbial carbonates in Lagoa Vermelha, Brazil
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 30 March 2023
Journal of Sedimentary Research (2023) 93 (3): 202–211.
...Fumito Shiraishi; Yusaku Hanzawa; Jiro Asada; Leonardo Fadel Cury; Anelize Manuela Bahniuk ABSTRACT In Lagoa Vermelha, Brazil, a lagoonal stromatolite and a saltpan microbial mat are investigated to understand the influence of environmental changes on the decomposition of microbial carbonates...
Journal Article
Sedimentological and geochemical characterization of microbial mats from Lagoa Vermelha (Rio de Janeiro, Brazil)
Caio Bittencourt Guedes, Michele Correia Arena, Hélisson Nascimento dos Santos, Bruno Valle, Jeferson de Andrade Santos, Julia Favoreto, Leonardo Borghi
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 30 June 2022
Journal of Sedimentary Research (2022) 92 (6): 591–600.
..., and geomicrobiology of these microbialites. This paper, however, focuses on the petrography, sedimentology, and geochemistry of recent and superficial microbial mats from Lagoa Vermelha to understand the interaction of carbonate and siliciclastic grains with an organic matrix and discuss their similarities...
Journal Article
Microstructure and mineral composition of Holocene stromatolites from Lagoa Vermelha, a hypersaline lagoon in Brazil: Insights into laminae genesis
Carolina N. Keim, Hélisson Nascimento dos Santos, Carolina Souza Santiago, Simone Pennafirme, Reiner Neumann, Jürgen Schnellrath, Inayá Lima, Mirian A.C. Crapez, Marcos Farina
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 27 August 2020
Journal of Sedimentary Research (2020) 90 (8): 887–905.
... remains controversial, and a convincing explanation for how stromatolites arise from microbial mats is still lacking. In this work, we analyze in detail a stromatolite from Lagoa Vermelha, a coastal hypersaline lagoon in Rio de Janeiro State, Brazil. The stromatolite presents a laminated core...
Journal Article
Microbial mediation of modern dolomite precipitation and diagenesis under anoxic conditions (Lagoa Vermelha, Rio de Janeiro, Brazil)
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 01 May 1997
Journal of Sedimentary Research (1997) 67 (3): 378–390.
... in Lagoa Vermelha, a shallow-water isolated coastal lagoon east of Rio de Janeiro, Brazil, provides a new environment to investigate the factors promoting dolomite precipitation under earth surface conditions. Lagoa Vermelha serves as a natural laboratory in which the dolomite formation process was studied...
Image
Sampling location at the Vermelha Lagoon. A) Detail map of Lagoa Vermelha...
in Lipid composition of the microbial mat from a hypersaline environment (Vermelha Lagoon, Rio de Janeiro, Brazil)
> Journal of Sedimentary Research
Published: 05 April 2021
Fig. 2.— Sampling location at the Vermelha Lagoon. A) Detail map of Lagoa Vermelha showing the E7 sampling site. B) Photo of polygonal mat collected at E7 site. C , D) Transversal cut showing inner laminae and color zonation of the microbial mat collected.
Image
Location map of Lagoa Vermelha, Rio de Janeiro State. A detailed satellite ...
in Sedimentological and geochemical characterization of microbial mats from Lagoa Vermelha (Rio de Janeiro, Brazil)
> Journal of Sedimentary Research
Published: 30 June 2022
Fig. 1.— Location map of Lagoa Vermelha, Rio de Janeiro State. A detailed satellite image shows the geomorphology of Lagoa Vermelha and the sampled location (red circle) (Google Earth 2020).
Image
An overview of the study sites. A) Location of Lagoa Vermelha, Brazil. B...
in Decompositional processes of microbial carbonates in Lagoa Vermelha, Brazil
> Journal of Sedimentary Research
Published: 30 March 2023
Fig. 1 An overview of the study sites. A) Location of Lagoa Vermelha, Brazil. B) Setting of Lagoa Vermelha, divided into three parts. C) Sampling sites of this study. At the sampled saltpan, evaporitic condensation proceeds from west to east. D) Stromatolites develop in the eastern part
Image
Maps and photographs of the study area. A–C) Maps showing Lagoa Vermelha. ...
in Microstructure and mineral composition of Holocene stromatolites from Lagoa Vermelha, a hypersaline lagoon in Brazil: Insights into laminae genesis
> Journal of Sedimentary Research
Published: 27 August 2020
Fig. 1.— Maps and photographs of the study area. A–C) Maps showing Lagoa Vermelha. A) Brazilian coast showing the location of Lagoa Vermelha (arrow), close to Rio de Janeiro city. B) A series of coastal lagoons lies along Rio de Janeiro State coast. The box encloses Lagoa Vermelha. C
Image
Map showing the location of Lagoa Vermelha on the southeastern coast of the...
in Lipid composition of the microbial mat from a hypersaline environment (Vermelha Lagoon, Rio de Janeiro, Brazil)
> Journal of Sedimentary Research
Published: 05 April 2021
Fig. 1.— Map showing the location of Lagoa Vermelha on the southeastern coast of the state of Rio de Janeiro, Brazil.
Image
Hypothesis for stromatolite growth in Lagoa Vermelha microbial mats. As pho...
in Microstructure and mineral composition of Holocene stromatolites from Lagoa Vermelha, a hypersaline lagoon in Brazil: Insights into laminae genesis
> Journal of Sedimentary Research
Published: 27 August 2020
Fig. 12.— Hypothesis for stromatolite growth in Lagoa Vermelha microbial mats. As photosynthetic microorganisms migrate upwards towards light, they are followed by microorganisms from underlying layers, as well as by physical and chemical gradients, which results in net growth of the microbial
Image
Porewater and sediment geochemistry from Lagoa Vermelha, Brazil. A: SO 4 2...
in Two opposing effects of sulfate reduction on carbonate precipitation in normal marine, hypersaline, and alkaline environments
> Geology
Published: 01 April 2013
Figure 2. Porewater and sediment geochemistry from Lagoa Vermelha, Brazil. A: SO 4 2– , HS – , and dissolved inorganic carbon (DIC). Conc.—concentration. B: Mg 2+ and Ca 2+ . C: pH. D: Calculated saturation indices (SI) for aragonite, calcite, and dolomite. IAP—ion activity product. E: δ 13 C
Image
Aspects of a recent microbial mat (Lagoa Vermelha, Brazil) from samples wit...
in Structural Arrangement of Sedimentary Organic Matter: Nanometer-Scale Spheroids as Evidence of a Microbial Signature in Early Diagenetic Processes
> Journal of Sedimentary Research
Published: 01 October 2010
Figure 4 Aspects of a recent microbial mat (Lagoa Vermelha, Brazil) from samples without acid treatment in natural conditions (Parts A–C) and after an experimental diagenesis, e.g., exposed to anoxia without light for three years (Parts D–F): A) TEM image of algae with a thick cell wall
Image
TABLE 1. CHEMICAL COMPOSITION OF LAGOA VERMELHA (LV) AND DESULFONATRONUM L...
Published: 01 December 2006
TABLE 1. CHEMICAL COMPOSITION OF LAGOA VERMELHA (LV) AND DESULFONATRONUM LACUSTRE CULTURE MEDIA
Image
Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sedi...
Published: 01 December 2000
Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sediment. Scanning electron microscope photomicrograph shows dumbbell and cauliflower shapes similar to those observed in pure cultures of sulfate-reducing bacteria strain LVform6, which was isolated from Lagoa Vermelha sediment.
Journal Article
Bacterially induced dolomite precipitation in anoxic culture experiments
Journal: Geology
Publisher: Geological Society of America
Published: 01 December 2000
Geology (2000) 28 (12): 1091–1094.
...Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sediment. Scanning electron microscope photomicrograph shows dumbbell and cauliflower shapes similar to those observed in pure cultures of sulfate-reducing bacteria strain LVform6, which was isolated from Lagoa Vermelha sediment. ...
Image
Figure 5. Surface- and pore-water \batchmode \documentclass[fleqn,10pt,le...
in Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system
> Geology
Published: 01 August 2004
— Lagoa Vermelha seaward-side surface brine; triangle—Lagoa Vermelha continental-side surface brine. See text for discussion. SMOW—standard mean ocean water; CDT—Cañon Diablo troilite.
Image
TABLE 1. COMPOSITION OF LV CULTURE MEDIUM VS. SEASONAL RANGES IS LAGOA VERM...
Published: 01 December 2000
TABLE 1. COMPOSITION OF LV CULTURE MEDIUM VS. SEASONAL RANGES IS LAGOA VERMELHA
Journal Article
Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system
Journal: Geology
Publisher: Geological Society of America
Published: 01 August 2004
Geology (2004) 32 (8): 701–704.
...— Lagoa Vermelha seaward-side surface brine; triangle—Lagoa Vermelha continental-side surface brine. See text for discussion. SMOW—standard mean ocean water; CDT—Cañon Diablo troilite. ...
Image
Figure 3. Chloride concentrations of surface brines and pore waters in stud...
in Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system
> Geology
Published: 01 August 2004
Figure 3. Chloride concentrations of surface brines and pore waters in study lagoons. Surface brines are indicated by square symbols. Lagoa Vermelha brines are likely sourced from seawater and meteoric water, while Brejo do Espinho brines are sourced from seawater and Lagoa Araruama brine. SW
Image
Schematic sketch representing the lagoons and sandy barriers of Região dos ...
in Sedimentological and geochemical characterization of microbial mats from Lagoa Vermelha (Rio de Janeiro, Brazil)
> Journal of Sedimentary Research
Published: 30 June 2022
Fig. 2.— Schematic sketch representing the lagoons and sandy barriers of Região dos Lagos region. 1) Precambrian basement, 2) Pre-Flandrian sandy deposits, 3) lagoon deposits and inner lagoon, 4) external sandy barrier, 5) external lagoons (Lagoa Vermelha), 6) Post-Flandrian barriers (modified
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