Calcium Carbonate Features

Durand, Nicolas; Monger, H. Curtis; Canti, Matthew

doi:10.1016/b978-0-444-53156-8.00009-x

Cited by 116 publications

(106 citation statements)

References 132 publications

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“…Las zonas principales diagenéticas, entre otras, están la zona vadosa, aguas meteóricas, aguas freáticas, etc, (Ahr, 2008). Entre los primeros 1 a 2 m, se realizan los procesos de neoformación de minerales (recristalización e inversión mineralógica) bajo condiciones oxidantes o neutras (Folk, 1974;Bathurst, 1975;Corrales et al, 1977;Ahr, 2008;Walther, 2009), por ejemplo, durante el enteramiento, es común la filtración de soluciones saturadas calcáreas que percolan desde la superficie, seguido por la recristalización de calcita secundaria (Bathurst, 1975;Ahr, 2008;Durand et al, 2010). Por recristalización se entiende el crecimiento de ciertos cristales a expensas directas de cristales de la misma especie, pero más pequeños (Folk, 1974;Bathurst, 1975 ).…”

Section: La Calcita Y Los Procesos De Diagénesisunclassified

“…Los carbonatos aumentan la solubilidad con el aumento de la acidez, lo que conlleva al relleno de poros por precipitación dando así una cristalización con una variedad de formas individuales, tales como agregados radiales, aciculares, microesparita laminada, micrita masiva (Folk, 1974;Bathurst, 1975;Ahr, 2008;Nichols, 2009;Durand et al, 2010), la neoformación de cristales conlleva a una cementación y por tanto una reducción ó destrucción significativa de la porosidad por una cementación pasiva (Bathurst, 1975;Moore, 1997).…”

Section: La Calcita Y Los Procesos De Diagénesisunclassified

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Petrografía de la cerámica Nimun y Baca (Vajilla Celestún Roja): Esfera Cerámica Canbalam de la península de Yucatán, Mexico

Obando-Acuña

Álvarez

2016

Rev. Geol. Amér. Central

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ABSTRACT:The ware Celestún Red (of the Nimun and Baca ceramic typologies) is one of the most diagnostic ceramics of the northwestern coast of Mexico's Yucatan Peninsula and a subject of ongoing debate regarding its distribution and origin. Although ceramics from coastal Campeche and Yucatan have been the focus of years of investigation, scholars still do not know if Celestún Red was manufactured locally during the Late Classic (A.D. 600-900) or was made and exchanged by the regional elite. In this presentation, the authors provide the first petrographic descriptions of Celestún Red, and use them to contribute to a formal definition of the Cambalan Ceramic Sphere defined by Jiménez (2002), Jiménez, Ceballos & Sierra (2006). These petrographic observations show that the detrital components were rhyolite fragments, vitroclastic tuffs, pumice, shards of glass, quartzes, plagioclase, calcite, hematite, magnetite and other minor contributors. The clay matrix is phyllomorphic, with a parallel, rectilinear fabric of fine grains. Granulometrically, the detrital components have been characterized as fine to medium sands. The pastes present evidence of diagenetic processes, most notably porosity in the primary ceramic matrix. These spaces are in some cases filled by secondary calcite deposits. Evidence of manufacturing was also observed, such as the fractures and bending of the paste that took place to produce the rims of these ceramic objects.

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Section: La Calcita Y Los Procesos De Diagénesisunclassified

Petrografía de la cerámica Nimun y Baca (Vajilla Celestún Roja): Esfera Cerámica Canbalam de la península de Yucatán, Mexico

Obando-Acuña

Álvarez

2016

Rev. Geol. Amér. Central

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“…At Poças de São Bento, the pendants, reproducing the drop shape, consist of alternating laminae, roughly parallel to the bottom surface of shells on which they formed. The laminae exhibit differences in colour, from limpid to brownish, depending on the amount of organic matter (Durand et al 2010). They can become quite irregular in the outermost surfaces, because of varying crystal morphologies of each laminae, ranging from micritic to microsparitic and acicular calcite crystals, and overall are quite fibrous.…”

Section: In Moita Domentioning

confidence: 99%

“…4d), threadlike structures corresponding to fungal hyphae encrusted with minute calcium carbonate crystals (Durand et al 2010). Calcified roots or rhizoliths (Durand et al 2010) occur in both cemented and non-cemented deposits (Fig. 6e).…”

Section: In Moita Domentioning

confidence: 99%

The microstratigraphic record of human activities and formation processes at the Mesolithic shell midden of Poças de São Bento (Sado Valley, Portugal)

Duarte

Iriarte

Diniz

et al. 2017

Archaeol Anthropol Sci

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Shell midden formation is largely controlled by anthropogenic processes, resulting from human exploitation of aquatic resources. This makes shell middens archives of both human behaviour and palaeoenvironmental records. However, their often complex stratigraphy hampers the isolation of individual anthropogenic events. In the central/ southern coast of Portugal, extensive inland estuaries were preferential settings for Mesolithic groups from c. 6200 cal BC. Here, we present a microstratigraphic approach to the shell midden of Poças de São Bento, one of the largest and best-known sites in the Sado Valley. The microfacies approach was based on sedimentary components, their abundance and arrangement, and post-depositional processes. Anthropogenic processes identified as tossing events and anthropogenically reworked deposits allowed inferences on spatial organisation, preferential refuse areas, occupational surfaces, and temporality of the occupations. The presence of calcareous pebbles in the anthropogenic, shell-rich sediments, together with foraminifera, presumably from the estuarine marshes, is compared with the regional geology, providing a hypothetical location of the shellfish gathering. The microstratigraphy described reveals a full internal dynamic in the formation of the apparently homogeneous shell midden layer. The human activities inferred at Poças de São Bento have many similarities with those reported for Cabeço da Amoreira in the nearby Tagus palaeoestuary. This evidence points to the need for further micromorphological approaches in similar deposits. The study of shell midden formation processes, through integrative microcontextual approaches, plays a major role in understanding Mesolithic societies in the large early Holocene estuary environments of Atlantic Iberia.

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“…This feature is constituted by equigranular sparitic calcite crystals, filling in channels, and it is common in semi-arid environment soils (Durand et al, 2010).…”

Section: Pedodiagenetic Cyclementioning

confidence: 99%

Pedodiagenetic Characterization of Cretaceous Paleosols in Southwest Minas Gerais, Brazil

Nascimento

Ladeira

Batezelli

2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:The influence of post-burial geological processes on preserving pedogenic properties has great importance in identifying ancient paleosols both in the field and in a laboratory. However there are not many publications that focus on characterizing paleosol diagenesis. As temperature and pressure progressively increase, evidence of pedogenesis is modified and destroyed, hindering paleoenvironment characterization and interpretation. This paper discusses diagenetic evidence and its relation to strictly pedogenic features, like structure, cements, nodules, and neoformation of clay minerals using the carbonate paleosols of the Marília Formation in the upper unit of the Bauru Basin as a case study. Despite the long geotectonic and thermal history of the Marília Fomation, paleosols bring us pedogenic evidence that can undergo micromorphological analyses, such as cementation, clay illuviation, bioturbation, and ped structures. The results of analyses in 25 paleopedogenic horizons indicate that the paleotopographic features were responsible for distribution of the diagenetic processes and preservation of the paleosol properties. The maturity of those paleosols controls lithification. In mature paleosols that developed in more stable portions of the landscape, characteristics such as carbonate cementation and development of pedogenic structures are the main factors that inhibit diagenesis. However diagenetic processes that influence poorly-developed paleosols are controlled by depositional characteristics and by changes in the water table, enabling more advanced diagenetic processes, compared to mature paleosols.

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Calcium Carbonate Features

Cited by 116 publications

References 132 publications

Petrografía de la cerámica Nimun y Baca (Vajilla Celestún Roja): Esfera Cerámica Canbalam de la península de Yucatán, Mexico

Petrografía de la cerámica Nimun y Baca (Vajilla Celestún Roja): Esfera Cerámica Canbalam de la península de Yucatán, Mexico

The microstratigraphic record of human activities and formation processes at the Mesolithic shell midden of Poças de São Bento (Sado Valley, Portugal)

Pedodiagenetic Characterization of Cretaceous Paleosols in Southwest Minas Gerais, Brazil

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