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Sedimentología y diagénesis de las secuencias lacustres someras en el área del yacimiento neolítico de Casa Montero (Vicálvaro, Madrid)

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Pérez Jiménez, José Luis and Alonso-Zarza, Ana María and Bustillo Revuelta, María Ángeles (2005) Sedimentología y diagénesis de las secuencias lacustres someras en el área del yacimiento neolítico de Casa Montero (Vicálvaro, Madrid). Geotemas, 8 (5). pp. 77-80. ISSN 1576-5172

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Abstract

The sedimentary succession at Casa Montero flint archaeological site belongs to the green-clays unit of the Intermediate Unit of the Madrid Basin. A succession of silt-clay (mainly Mg-smectites), dolomite and silica rocks has been studied to know the sedimentary environment and diagene- tic processes around the site. The succession consists of silt-clay and carbonate sequences that represent a lacustrine environment with subaerial exposure events. The exposition events led to the development of a enlarged pseudomicrokarst in the topmost carbonate level. Vertisols were reworked at the top of the sequence. The diagenetic processes include early dolomitization of palustrine carbonates, partial transformation of the Mg-smectites and silicification of carbonates and clays in a groundwater environment. The presence of the archaeological site is due to the presence of opaline cherts with "aging" to quartz, that are uncommon in the silt-clay sequences of the Madrid Basin. The "aging" give these flints optimum properties for the Neolithic industry.


Item Type:Article
Uncontrolled Keywords:Madrid Basin, Miocene, Palustrine, Dolomitization, Mg-smectites, Silicification, Archaelogical site
Subjects:Sciences > Geology > Geodynamics
ID Code:61389
Deposited On:07 Jul 2020 09:54
Last Modified:07 Jul 2020 09:54

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