Classification and Environmental Significance of Algal Stromatolites

Logan, Brian W.; Rezak, Richard; Ginsburg, Robert N.

doi:10.1086/626965

Cited by 554 publications

(276 citation statements)

References 5 publications

Supporting

Mentioning

228

Contrasting

Unclassified

Order By: Relevance

“…Desiccation cracks occur on top of some of the beds in this unit. The second unit comprises laminated structures interpreted to be stromatolites (Kalkowsky, 1908;Logan et al, 1964;Tucker & Wright, 1990;Riding, 2000). In addition, we found a clothed texture re£ecting syndepositional processes at locality 15, also interpreted to re£ect microbial origin (trombolites sensu Riding, 2000).…”

Section: Facies Association C1mentioning

confidence: 99%

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

Mora¹,

Gaona²,

Kley³

et al. 2009

Basin Research

103

View full text Add to dashboard Cite

Lower Cretaceous early syn-rift facies along the eastern £ank of the Eastern Cordillera of Colombia, their provenance, and structural context, reveal the complex interactions between Cretaceous extension, spatio -temporal trends in associated sedimentation, and subsequent inversion of the Cretaceous Guatiqu|¤ a paleo -rift. South of 4130 0 N lat, early syn-rift alluvial sequences in former extensional footwall areas were contemporaneous with fan-delta deposits in shallow marine environments in adjacent hanging-wall areas. In general, footwall erosion was more pronounced in the southern part of the paleorift. In contrast, early syn-rift sequences in former footwall areas in the northern rift sectors mainly comprise shallow marine supratidal sabkha to intertidal strata, whereas hanging-wall units display rapid transitions to open-sea shales. In comparison with the southern paleo -rift sector, fan-delta deposits in the north are scarce, and provenance suggests negligible footwall erosion.The southern graben segment had longer, and less numerous normal faults, whereas the northern graben segment was characterized by shorter, rectilinear faults.To the east, the graben system was bounded by major basin-margin faults with protracted activity and greater throw as compared with intrabasinal faults to the west. Intrabasinal structures grew through segment linkage and probably interacted kinematically with basin-margin faults. Basin-margin faults constitute a coherent fault system that was conditioned by pre-existing basement fabrics. Structural mapping, analysis of present-day topography, and balanced cross sections indicate that positive inversion of extensional structures was focused along basin-bounding faults, whereas intrabasinal faults remained una¡ected and were passively transported by motion along the basin-bounding faults.Thus, zones of maximum subsidence in extension accommodated maximum elevation in contraction, and former topographic highs remained as elevated areas.This documents the role of basin-bounding faults as multiphased, long-lived features conditioned by basement discontinuities. Inversion of basinbounding faults was more e⁄cient in the southern than in the northern graben segment, possibly documenting the inheritance and pivotal role of fault-displacement gradients. Our observations highlight similarities between inversion features in orogenic belts and intra-plate basins, emphasizing the importance of the observed phenomena as predictive tools in the spatiotemporal analysis of inversion histories in orogens, as well as in hydrocarbon and mineral deposits exploration.

show abstract

Section: Facies Association C1mentioning

confidence: 99%

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

Mora¹,

Gaona²,

Kley³

et al. 2009

Basin Research

103

View full text Add to dashboard Cite

show abstract

“…The lower stratum (Fig. 6C) is characterized by tabular stromatolites, corresponding to the type-LLH (Laterally linked hemispheroids) from Logan et al (1964) classification. In the upper stratum, the stromatolites are preferably domic (Fig.…”

Section: Columnar Stromatolitesmentioning

confidence: 99%

“…According to Golubic and Seong-Joo (1999), the record fossil of cyanobacteria is one of the oldest in Logan et al (1964); (D) type-SH stromatolite by Logan et al (1964) classification; (E) stromatolitic bioherm between crenulated laminites -original photo; (F) stromatolitic bioherm -lens detached.…”

Section: Microbial Filamentsmentioning

confidence: 99%

Microbial filaments in stromatolites and laminites of Balbuena III Sequence (Maastrichtian/Danian) of Yacoraite Formation in Metán-Alemania Sub-basin, Salta region, Argentina, and its alaeoenvironmental significance

et al. 2015

View full text Add to dashboard Cite

RESUMO A Bacia de Salta localiza-se no noroeste argentino e sua origem está relacionada a um rifte intracontinental, formado durante o Cretáceo e início do Paleógeno. Subdivide-se em quatro sub-bacias (Lomas de Olmedo a leste; Sey a oeste; Tres Cruces a norte; e Metán-Alemania a sul) que foram preenchidas por sedimentos dos Subgrupos Pirgua (fase sin-rifte), Balbuena e Santa Bárbara (fase sag ). O Subgrupo ou Supersequência Balbuena é dividido em quatro sequências: Balbuena I, II, III e IV, da base para o topo. O presente estudo identificou filamentos microbianos em imagens geradas pelo microscópio eletrônico de varredura em amostras de estromatólitos e laminitos da Sequência Balbuena III (Maastrichtiano/Daniano) da Formação Yacoraite, na Sub-bacia Metán-Alemania, região do dique Cabra Corral, distrito de Coronel Moldes, Argentina. A ocorrência desses filamentos, identificados em calcários formados em períodos de clima árido e depositados no intervalo de lago fechado da sequência em estudo, indica a influência de atividade biológica na formação dessas rochas. A identificação dos filamentos microbianos, preservados a partir de estruturas de cianobactérias, auxilia a interpretação paleoambiental, uma vez que a ocorrência desses microorganismos é limitada à zona fótica e é comum a ambientes estressantes. Os laminitos da área de estudo foram interpretados como formados em planícies lamosas supralitorâneas na zona vadosa, enquanto os estromatólitos se formaram em ambiente sublitorâneo, estando constantemente submersos. Além dos microbialitos, ocorrem na Sequência Balbuena III fácies carbonáticas, siliciclásticas e mistas, depositadas em ambiente lacustre.

show abstract

“…The algae secrete filaments that trap and bind very fine-grained detritus, and as growth of the algae continues, laminations are formed. The morphology of the stromatolite structure depends on the fi-equency of wetting and the energy of destructive processes working on the algal mat (Logan, 1960).…”

Section: Carbonatesmentioning

confidence: 99%

“…At Denen Dora Koma, the upper surfaces of these limestones display poorly developed symmetrical ripple marks and thin algal mat encrustations. Most are laterally linked hemispheroids (Logan et al, 1960) or cumulate structures (Preiss, 1977). The algal horizons are generaUy not laterally persistent and can be traced only for a few meters.…”

Section: Depositional Environmentmentioning

confidence: 99%

Stratigraphy and sedimentology of the Hadar Formation Afar, Ethiopia

Yemane

View full text Add to dashboard Cite

Classification and Environmental Significance of Algal Stromatolites

Cited by 554 publications

References 5 publications

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

The role of inherited extensional fault segmentation and linkage in contractional orogenesis: a reconstruction of Lower Cretaceous inverted rift basins in the Eastern Cordillera of Colombia

Microbial filaments in stromatolites and laminites of Balbuena III Sequence (Maastrichtian/Danian) of Yacoraite Formation in Metán-Alemania Sub-basin, Salta region, Argentina, and its alaeoenvironmental significance

Stratigraphy and sedimentology of the Hadar Formation Afar, Ethiopia

Contact Info

Product

Resources

About