Micro-framework reconstruction from peloidal-dominated mud mounds (Viséan, SW Spain)



Downloads per month over past year

Rodríguez Martínez, Marta and Reitner, Joachim and Más Mayoral, Ramón (2010) Micro-framework reconstruction from peloidal-dominated mud mounds (Viséan, SW Spain). Facies, 56 (1). pp. 139-156. ISSN 0172-9179, ESSN: 1612-4820

[thumbnail of Micro-framework reconstruction from peloidal-dominated mud mounds (Viséan, SW Spain).pdf] PDF
Creative Commons Attribution.


Official URL: http://dx.doi.org/10.1007/s10347-009-0201-9


Currently, the different roles of peloidal micrites are not well understood in matrix-supported bioconstructions such as mud mounds. Upper Viséan outcrops from Guadiato Valley, Cordoba Province, SW Spain provide well-preserved peloidal-dominated mud mounds. Microstructual analysis of these mud mounds has allowed us to establish 13 microfabrics. Although peloids are conspicuous constituents in the microfabrics, they have been differentiated into seven peloidal-dominated types, grouped into three categories: (a) homogeneous fine peloidal types (3 subtypes); (b) homogeneous coarse peloidal types (2 subtypes); and (c) heterogeneous coarse peloidal types (two subtypes). Fast cm-scale microfabric changes were mapped directly onto thin sections. This methodology allows the researcher to recognize the micro-framework of these mud mounds as a complex, multiepisodic organization of microframes and intermicroframes that are formed by primary and secondary automicrites (non-reworked and reworked automicrites, respectively), autochthonous internal sediment, and allomicrite and marine fibrous cements. The thin-section mapping was also used to estimate the automicrite-allomicrite relationship, which is crucial in separating the microbial and biodetrital mud mounds.

Item Type:Article
Uncontrolled Keywords:Mud mound, Peloids, Automicrites, Micro-framework, Carboniferous, Spain
Subjects:Sciences > Geology > Stratigraphic geology
Sciences > Geology > Petrology
ID Code:76033
Deposited On:22 Dec 2022 06:53
Last Modified:22 Dec 2022 11:57

Origin of downloads

Repository Staff Only: item control page