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- W3048781534 abstract "The Saurashtra and Kachchh regions of Western India contain mainly three types of Quaternary carbonate sediments, viz. beach rocks, miliolites and stabilized sand dunes. The beach rocks and sand dunes are restricted to the coastal areas of Saurashtra, whereas the miliolites are widespread, forming patchy isolated outcrops. In Kachchh, only miliolites and sand dunes occur against the central and northern hilly terrain while their coastal occurrences are missing. Petrographically, the beach rocks are mostly biopelmicrites, biomicrites and biosparites, whereas the miliolites are biopelsparites and pelsparites. Under the microscope, beach rocks show fibrous and/or micritic aragonite cement followed by blocky void-filling sparite cement. In thin sections the miliolite exhibits variegated cement morphology, such as meniscus, dripstone-drapestone (microstalactitic-stalagmitic), dog-toothspar, nail-headspar, circumgranular rim, syntaxial overgrowth, void-filling, etc. all characterized by non-ferroan low-magnesian sparry calcite mineralogy, indicating their precipitation mostly under vadose and occasionally phreatic meteoric environment. The scrutiny of a number of thin sections aided by the field study and other laboratory studies (e.g. XRD, TL, SEM) of these deposits has enabled the authors to establish the five sequential stages of their diagenesis, which are in general agreement with the study made by Land and others (1967) in Bermuda carbonates. Accordingly, the beach rocks and miliolites belong to the III, IV and V stages of diagenesis whereas the stabilized sand dunes have hardly reached stage II or III." @default.
- W3048781534 created "2020-08-18" @default.
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- W3048781534 date "2020-08-26" @default.
- W3048781534 modified "2023-09-25" @default.
- W3048781534 title "Diagenesis in the Quaternary carbonate sediments of Saurashtra and Kachchh, Western India" @default.
- W3048781534 cites W2320364547 @default.
- W3048781534 doi "https://doi.org/10.1201/9781003077862-3" @default.
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