Microfacies controls on weathering of carbonate building stones: Devonian (northern Sauerland, Germany)

May, Andreas

doi:10.1007/bf02536897

Cited by 9 publications

(5 citation statements)

References 25 publications

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“…X-ray diffraction analyses reveal that both types of rocks are composed of ~99% calcite. Consistent with qualitative observations of limestones that suggest that coarsegrained rock can be more resistant to weathering (May, 1994), our results confirm that textural features may play a role in determining erosional rates. Texture-dependent erosion is often attributed to efflorescence (Espinosa Marzal and Scherer, 2008); however, the Western Wall site is well drained and there is no apparent evidence of salt damage.…”

Section: Resultssupporting

confidence: 91%

Limestone weathering rates accelerated by micron-scale grain detachment

Emmanuel¹,

Levenson²

2014

Geology

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Section: Resultssupporting

confidence: 91%

Limestone weathering rates accelerated by micron-scale grain detachment

Emmanuel¹,

Levenson²

2014

Geology

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“…4b) and the local gradual transition from coarse rudstone (MF9) to grainstone (MF8) support this assumption. The described sequence is comparable to other sections (May 1994), which have been interpreted to represent parts of allodapic limestone turbidites (Meischner 1964). This microfacies corresponds to the basal part of a proximal limestone turbidite deposited on the proximal part of a fore-reef environment below the FWWB.…”

Section: Discussionsupporting

confidence: 82%

“…The microfacies were compared with other existing microfacies models such as those of Mamet and Pre ´at (1985), Tucker (1974), Wendt and Aigner (1985), May (1994), andCasier andPreat (2007).…”

Section: Microfaciesmentioning

confidence: 99%

Sedimentary development of a continuous Middle Devonian to Mississippian section from the fore-reef fringe of the Brilon Reef Complex (Rheinisches Schiefergebirge, Germany)

Pas

Silva

Cornet

et al. 2012

Facies

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The Brilon-reef complex is one of the biggest Devonian carbonate buildups (*80 km 2 ) of the Rheinisches Schiefergebirge. The Burgberg section is located in the southeastern fore-reef area of the Brilon Reef Complex and exposes a succession of strata (117 m thick), which extends from the Middle Givetian (middle varcus conodont Zone) to the Vise ´an (bilineatus conodont Zone). Field and microfacies observations led to the definition of nine microfacies that are integrated into a sedimentary model divided into off-reef, intermediate fore-reef, and proximal fore-reef sedimentary domains (SD). The off-reef domain (SD1) is the most distal setting observed and is characterized by fine-grained sediments, dominated by pelagic biota and the local occurrence of gravity-flow deposits. The intermediate fore-reef (SD2) is characterized by a mixture of biota and sediments coming from both deeper-water and shallow-water sources and is influenced by storm and gravity-flow currents. In this domain, Renalcis moundlike structures developed locally. Finally, the proximal fore-reef (SD3) corresponds to the most proximal setting that is strongly influenced by gravity-flow currents derived from the Brilon Reef Complex. The temporal

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“…Considering the presence of wackestone-packstone intraclasts (MF2), which are interpreted as background sedimentation (see interpretation of MF2), the depositional setting of MF5 might be located under the FWWB. Similar microfacies have been described by May (1994) and Pas et al (2013) for the fore-reef-slope environment from the Rhenisches Schiefergebirge (Germany) and are interpreted as a part of the general pattern visible in ''allodapic'' limestone (Zone 1b; Meischner 1964) and in the ideal turbiditic sequence of Bouma (division Tb;Bouma 1962). Other sedimentological criteria such as the presence of lamination, local fining upward sequences also support a deposition related to turbidity currents.…”

Section: Discussionsupporting

confidence: 73%

Insight into the development of a carbonate platform through a multi-disciplinary approach: a case study from the Upper Devonian slope deposits of Mount Freikofel (Carnic Alps, Austria/Italy)

Pas

Silva

Suttner

et al. 2013

Int J Earth Sci (Geol Rundsch)

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The development and behavior of million yearscaled depositional sequences recorded within Palaeozoic carbonate platform has remained poorly examined. Therefore, the understanding of palaeoenvironmental changes that occur in geological past is still limited. We herein undertake a multi-disciplinary approach (sedimentology, conodont biostratigraphy, magnetic susceptibility (MS), and geochemistry) of a long-term succession in the Carnic Alps, which offers new insights into the peculiar evolution of one of the best example of Palaeozoic carbonate platform in Europe. The Freikofel section, located in the central part of the Carnic Alps, represents an outstanding succession in a fore-reef setting, extending from the Latest Givetian (indet. falsiovalis conodont zones) to the Early Famennian (Lower crepida conodont zone). Sedimentological analysis allowed to propose a sedimentary model dominated by distal slope and fore-reef-slope deposits. The most distal setting is characterized by an autochthonous pelagic sedimentation showing local occurrence of thin-bedded turbiditic deposits. In the fore-reef slope, in a more proximal setting, there is an accumulation of various autochthonous and allochthonous fine-to coarse-grained sediments originated from the interplay of gravity-flow currents derived from the shallow-water and deepwater area. The temporal evolution of microfacies in the Freikofel section evolves in two main steps corresponding to the Freikofel (Unit 1) and the Pal (Unit 2) limestones. Distal slope to fore-reef lithologies and associate changes are from base to top of the section: (U1) thick bedded litho-and bioclastic breccia beds with local fining upward sequence and fine-grained mudstone intercalations corresponding, in the fore-reef setting, to the dismantlement of the Eifelian-Frasnian carbonate platform during the Early to Late Frasnian time (falsiovalis to rhenana superzones) with one of the causes being the Late Givetian major rift pulse; (U2) occurrence of thinbedded red nodular and cephalopod-bearing limestones with local lithoclastic grainstone intercalations corresponding to a significant deepening of the area and the progressive withdrawal of sedimentary influxes toward the basin, in relation with Late Frasnian sea-level rise. MS and geochemical analyses were also performed along the Freikofel section and demonstrate the inherent parallel link existing between variation in MS values and proxy for terrestrial input. Interpretation of MS in terms of palaeoenvironmental processes reflects that even though distality

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Microfacies controls on weathering of carbonate building stones: Devonian (northern Sauerland, Germany)

Cited by 9 publications

References 25 publications

Limestone weathering rates accelerated by micron-scale grain detachment

Limestone weathering rates accelerated by micron-scale grain detachment

Sedimentary development of a continuous Middle Devonian to Mississippian section from the fore-reef fringe of the Brilon Reef Complex (Rheinisches Schiefergebirge, Germany)

Insight into the development of a carbonate platform through a multi-disciplinary approach: a case study from the Upper Devonian slope deposits of Mount Freikofel (Carnic Alps, Austria/Italy)

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