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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Soil science. ; Earth sciences. ; Physical geography. ; Soil Science. ; Earth Sciences. ; Physical Geography. ; Earth Sciences.
    Description / Table of Contents: Chapter 1. The multiscalar nature of soils -- Chapter 2. History of micromorphology -- Chapter 3. Observation and sampling of soils -- Chapter 4. How to make thin sections -- Chapter 5.The polarised light microscope -- Chapter 6. Other techniques of observation -- Chapter 7. Electron and energy imaging -- Chapter 8. Colours of minerals -- Chapter 9. The micromorphological approach -- Chapter 10. Concept of fabric -- Chapter 11. Multiscalar approach to fabric -- Chapter 12. Basic distribution patterns -- Chapter 13. c/f related distributions I -- Chapter 14. c/f related distributions II -- Chapter 15. Aggregates and aggregation -- Chapter 16. Degree of separation and accommodation of aggregates -- Chapter 17. The nature of voids -- Chapter 18. Morphology of voids I -- Chapter 19. The morphology of voids II -- Chapter 20. Microstructure I -- Chapter 21. Microstructure II -- Chapter 22. Mineral and organic constituents -- Chapter 23. Particle size and sorting -- Chapter 24. Shape of grains: equidimensionality -- Chapter 25. Shape of grains: roundness and sphericity -- Chapter 26. Basalt, granite, and gabbro -- Chapter 27. Schist, gneiss, and amphibolite -- Chapter 28. Quartzite and marble -- Chapter 29. Calcium-bearing sedimentary rocks -- Chapter 30. Sand and sandstone -- Chapter 31. Mineral grains in the soil I: quartz and chalcedony -- Chapter 32. Mineral grains in the soil II: feldspar and mica -- Chapter 33. Mineral grains in the soil III: inosilicates and nesosilicates -- Chapter 34. Mineral grains in the soil IV: carbonates -- Chapter 35. Mineral grains in the soil V: chlorides and sulfates -- Chapter 36. Biominerals I -- Chapter 37. Biominerals II -- Chapter 38. Biominerals III -- Chapter 39. Anthropogenic features I -- Chapter 40. Anthropogenic features II -- Chapter 41. Organic matter I -- Chapter 42. Organic matter II -- Chapter 43. Humus -- Chapter 44. Micromass -- Chapter 45. B-fabric I -- Chapter 46. B-fabric II -- Chapter 47. Imprints of pedogenesis -- Chapter 48. Iron- and manganese-bearing nodules -- Chapter 49. Carbonate nodules -- Chapter 50. Polygenetic nodules -- Chapter 51. Nodules: morphology and border shape -- Chapter 52. Nodules: orthic, anorthic, disorthic -- Chapter 53. Crystals and crystal intergrowths -- Chapter 54. Impregnations -- Chapter 55. Depletions -- Chapter 56. Coatings with clays I -- Chapter 57. Coatings with clays II -- Chapter 58. Micropans, coarse coatings, cappings, and crusts -- Chapter 59. Hypocoatings and quasicoatings: amorphous -- Chapter 60. Coatings and hypocoatings: crystalline -- Chapter 61. Mineral infillings -- Chapter 62. Mineral infillings of biological origin -- Chapter 63. Pedoturbations -- Chapter 64. Faecal pellets -- Chapter 65. Dung and vertebrate excrements -- Chapter 66. Composite pedogenic features -- Chapter 67. Uncommon features -- Chapter 68. Pedofeatures and soil processes -- Chapter 69. Clay dynamics I - Translocation -- Chapter 70. Clay dynamics II - Swelling -- Chapter 71. Water dynamics. -- Chapter 72. Carbonate and gypsum dynamics -- Chapter 73. Processes involving iron oxyhydroxides -- Chapter 74. Biogeochemical processes I -- Chapter 75. Biogeochemical processes II -- Chapter 76. The future of soil micromorphology -- Chapter 77. Beyond the two dimensions -- Chapter 78. The prospect of chemical imaging.
    Abstract: This open access atlas is an up-to-date visual resource on the features and structures observed in soil thin sections, i.e. soil micromorphology. The book addresses the growing interest in soil micromorphology in the fields of soil science, earth science, archaeology and forensic science, and serves as a reference tool for researchers and students for fast learning and intuitive feature and structure recognition. The book is divided into six parts and contains hundreds of images and photomicrographs. Part one is devoted to the way to sample properly soils, the method of preparation of thin sections, the main tool of soil micromorphology (the microscope), and the approach of soil micromorphology as a scientific method. Part two focuses on the organisation of soil fragments and presents the concept of fabric. Part three addresses the basic components, e.g. rocks, minerals, organic compounds and anthropogenic features. Part four lists all the various types of pedogenic features observed in a soil, i.e. the imprint of pedogenesis. Part five gives interpretations of features associated with the main processes at work in soils and paleosols. Part six presents a view of what the future of soil micromorphology could be. Finally, the last part consists of the index and annexes, including the list of mineral formulas. This atlas will be of interest to researchers, academics, and students, who will find it a convenient tool for the self-teaching of soil micromorphology by using comparative photographs.
    Type of Medium: Online Resource
    Pages: XIX, 177 p. 82 illus., 81 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030678067
    DDC: 631.4
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Publishing Ltd
    Sedimentology 45 (1998), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In freshwater environments such as river and stream bottoms, rocks and submerged vegetation are covered with a biological felt (also called a periphyton, microbial mat, biofilm, etc.) that is susceptible to calcification. Compilation of an extensive bibliography and our own observations have allowed the identification of 44 species of Coccogonophyceae, 122 Hormogonophyceae, 2 Chrysophyceae, 35 Chlorophyceae, 3 Xanthophyceae, 2 diatoms, and 3 Rhodophyceae that grow on calcareous tufa and coat vegetation. Diverse genera include species that are also calcified but impossible to determine because they lack reproductive organs. Crystals have been described from 74 species in the literature and we have observed 53 others. They can be classified into 10 groups: (1) platelets on cell walls (Volvocales, analogues of coccolithophorids) (2) crystals in mucilage (Synechococcus, diatoms, Hydrurus) and calcified stalks (Oocardium) (3) sheaths containing crystals in the form of simple or three-branched needles, dendritic crystals, and crystals with box-work fabric (Geitleria, Scytonema) (4) sheaths containing calcite spherulites (5) stalks intersecting a large crystal (Cymbella) (6) micrite tubes (Phormidium, Schizothrix) (7) isolated rhombohedra (Zygnema, Scytonema), rhombohedra in clusters or chains (Nostoc parmelioides) (8) sparite platelets (Vaucheria) or isodiametric crystals (Scytonema, Chaetophora) (9) large crystals crosscut by many parallel filaments (Rivularia, Batrachospermum), and (10) fan-like crystals (Phormidium). These crystals can be arranged in clusters or form regular laminations. They can transform into isodiametric sparite crystals to form fan-like or radial palisadic structures. Knowledge of primary crystals and their diagenetic transformations is necessary to correctly interpret freshwater stromatolites. The latter always result from intense calcification and are a diagenetic transformation of a biological felt made of many prokaryotic and eukaryotic algal species, small invertebrates, and organic and mineral debris.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Biogeochemistry 35 (1996), S. 447-470 
    ISSN: 1573-515X
    Keywords: biomineralization ; calcium oxalate ; calcium carbonate ; calcrete ; fungi ; model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Fungal filaments are the most abundant organic features in weathered profiles developed on chalky limestone ("platy calcrete"). Their activity affects the mineral dynamics of the pore/carbonate microsystem. A theoretical biogeochemical model is proposed to describe the Ca-oxalate-carbonate cycle related to fungal activity in dry environments. The system studied is the pore itself (defined as the reactor) delimited by its wall and its content: solutions, gases (air and CO2), microorganic material, their transformation products and the minerals present (calcite and calcium oxalate). The system exchanges gas and solution with the outside environment, which includes micritic calcite, solutions, a gaseous phase (air and CO2), and the nanoporosity of the pore wall constituted by the micritic matrix. A diagram of pH = f(log |Ca2+|) is constructed to simulate the behaviour of various fungal excretions, whether the system is open or semi-closed. Two steps are studied. In the first step, the fungi is in full metabolic activity, and assumed to secrete i) an organic diacid (BH2) of soluble calcium salt, or ii) oxalic acid, or iii) soluble sodium oxalate, or iv) CO2. In the second step, bacteria transform the oxalates into carbonates. In the first step, the model concurs with petrographic observations, on the condition that the system is semi-closed and the aggressive agent produced by the hypha is mostly oxalic acid (COOH)2. In the second step, the pore solution becomes saturated in calcite, whether the system is open or semi-closed. This explains the calcium carbonate precipitation inside the pore as needles or microsparite and impregnation of the micritic matrix around the pores. In conclusion, the presence of fungi allows a redistribution of calcium carbonate. This secondary cementation is strong in the case of recrystallization of pore walls and weaker when infilling voids with needles.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Mathematical geology 28 (1996), S. 87-109 
    ISSN: 1573-8868
    Keywords: calcrete ; algal mats ; diffusion-limited aggregation ; morphometry ; fractals ; image analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract The laminar crust, constituting the upper part of calcretes (terrestrial CaCO3 accumulations inside surficial sediments), is a succession of thin layers of various colors and shapes resembling micro-stromatolites. The crust structure and its diagenetic evolution are similar to stromatolites. A quantitative study of its structure was made using image analysis. Euclidian parameters were calculated to describe lamina shape. Eight hundred and eighty-six laminae were divided into six classes from the flatest forms to columnar shapes. The geometrical relationships between the shapes are interpreted as steps in the growth process of the microstromatolite. A fractal model of laminar crust growth was developed, using the diffusion-limited aggregation model (DLA) and dilation (an operation of mathematical morphology). This model simulates all growth steps observed in thin section and emphasizes the necessity of an interface with the atmosphere to explain the variety of shapes. This growth model supports the theory of a surficial and biogenic origin for certain calcrete laminar crusts.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2014-11-09
    Print ISSN: 0302-8933
    Electronic ISSN: 1432-072X
    Topics: Biology
    Published by Springer
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  • 6
    Publication Date: 2008-07-09
    Print ISSN: 0276-0460
    Electronic ISSN: 1432-1157
    Topics: Geosciences
    Published by Springer
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  • 7
    Publication Date: 1996-12-01
    Print ISSN: 0168-2563
    Electronic ISSN: 1573-515X
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Springer
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  • 8
    Publication Date: 2020-04-21
    Description: Rare earth elements (REEs) and yttrium in seawater originate from atmospheric fallout, continental weathering, and transport from rivers, as well as hydrothermal activity. Previous studies have reported the use of REE and Y measurements in biogenic carbonates as a means to reconstruct these surface processes in ancient times. As coastal seawater REE and Y concentrations partially reflect those of nearby rivers, it may be possible to obtain a regional fingerprint of these concentrations from bivalve shells for seafood traceability and environmental monitoring studies. Here, we present a dataset of 297 measurements of REE and Y abundances by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) from two species (Crassostrea gigas and Ostrea edulis). We measured a total of 49 oyster specimens from six locations in France (Atlantic Ocean and Mediterranean Sea). Our study reports that there is no significant difference in concentrations from shell parts corresponding to winter and summer periods for both species. Moreover, interspecific vital effects are reported from specimens from both species and from the same locality. REE and Y profiles as well as t-distributed stochastic neighbour embedding processing (t-SNE; a discriminant statistical method) indicate that REE and Y measurements from C. gigas shells can be discriminated from one locality to another, but this is not the case for O. edulis, which presents very similar concentrations in all studied localities. Therefore, provenance studies using bivalve shells based on REEs and Y have to first be tested for the species. Other methods have to be investigated to be able to find the provenance of some species, such as O. edulis.
    Print ISSN: 1726-4170
    Electronic ISSN: 1726-4189
    Topics: Biology , Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 9
    Publication Date: 2017-12-19
    Print ISSN: 0168-2563
    Electronic ISSN: 1573-515X
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Springer
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  • 10
    Publication Date: 2014-07-03
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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