Abstract
AbstractThe literature dealing with secondary carbonates in loess-paleosoil sequences is in many cases ambiguous, which means that different concepts are used for the same features, whereas certain concepts referring to different types are used as collective nouns. The aim of this study is to give a review on this nomenclature and to draw comparision between the various types and concepts. As a main guiding principle the article of Becze-Deák et al. (1997) is used, because it has formulated a proposition of a nomenclature which would be worthwhile to adopt. The terms and concepts introduced by their work are exact, referring to certain separated secondary carbonates and are of decisive importance with a view to paleoenvironmental reconstruction.The research of secondary carbonates in loess-paleosoil sequences is of great importance, through providing detailed information on the paleoenvironment, especially on the former moisture conditions (including leaching processes). Secondary carbonates originate from the vertical, horizontal or in situ resettlement of carbonates during pedogenesis in the soil-sedimentary environment. Among others, calcified root cells, hypocoatings and needle-fiber calcite are classified into the microscale category, while concretions (e.g. loess dolls) belong to the macroscale types.
Subject
General Earth and Planetary Sciences,Environmental Science (miscellaneous)
Reference38 articles.
1. Bajnóczi B., Kovács-Kis V., Origin of pedogenic needle-fiber calcite revealed by micromorphology and stable isotope composition — a case study of a Quaternary paleosol from Hungary. Chem. Erde — Geochem., 2006, 66, 203–212
2. Becze-Deák J., Study of secondary CaCO3 in the frame of geopedological research and reconstruction of the environment evolution of the last interglacial — early glacial sequence at the Wallertheim Site (Rheinhessen — Germany). PhD Thesis, University of Gent, Belgium, 1997
3. Becze-Deák J., Langohr R., Verrecchia E.P., Small scale secondary CaCO3 accumulations in selected sections of the European loess belt. Morphological forms and potential for paleoenvironmental reconstruction. Geoderma, 1997, 76, 221–252
4. Boguckyj A.B., Łanczont M., Łącka B., Madeyska T., Zawidzki P., Stable isotopic composition of carbonates in Quaternary sediments of the Skala Podil’ska sequence (Ukraine). Quatern. Int., 2006, 152–153, 3–13
5. Budd D.A., Pack S.M., Fogel M.L., The destruction of paleoclimatic isotopic signals in Pleistocene carbonate soil nodules of Western Australia. Palaeogeogr. Palaeocl., 2002, 188, 249–273