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TAPHONOMIC PROCESSES IN SELECTED LOWER AND MIDDLE JURASSIC FORAMINIFERA FROM THE IBERIAN RANGE AND BASQUE-CANTABRIAN BASIN (SPAIN)

2002; Cushman Foundation for Foraminiferal Research; Volume: 32; Issue: 1 Linguagem: Inglês

10.2113/0320022

1943-264X

Carlos P. Herrero,

Paleontology and Stratigraphy of Fossils

Research Article| January 01, 2002 TAPHONOMIC PROCESSES IN SELECTED LOWER AND MIDDLE JURASSIC FORAMINIFERA FROM THE IBERIAN RANGE AND BASQUE-CANTABRIAN BASIN (SPAIN) Concha Herrero; Concha Herrero 1 Departamento y UEI de Paleontología, Facultad de Ciencias Geológicas e Instituto de Geología Económica (UCM-CSIC), Ciudad Universitaria, 28040 Madrid, Spain 1E-mail: cherrero@geo.ucm.es Search for other works by this author on: GSW Google Scholar Ma Luisa Canales Ma Luisa Canales Departamento y UEI de Paleontología, Facultad de Ciencias Geológicas e Instituto de Geología Económica (UCM-CSIC), Ciudad Universitaria, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (2002) 32 (1): 22–42. https://doi.org/10.2113/0320022 Article history received: 17 Aug 1999 accepted: 10 May 2001 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Concha Herrero, Ma Luisa Canales; TAPHONOMIC PROCESSES IN SELECTED LOWER AND MIDDLE JURASSIC FORAMINIFERA FROM THE IBERIAN RANGE AND BASQUE-CANTABRIAN BASIN (SPAIN). Journal of Foraminiferal Research 2002;; 32 (1): 22–42. doi: https://doi.org/10.2113/0320022 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Lower and Middle Jurassic foraminifera from the Iberian and Basque-Cantabrian Basins exhibit distinct features due to different biostratinomic and diagenetic processes. The main mechanisms of taphonomic alteration identified in our material are bioerosion, abrasion, fragmentation, dissolution, sedimentary infilling, cementation, mineralization, recrystallization sensu lato, pressure-dissolution processes, distortion and removal. Sample preparation prevents the detection of mechanism such as reorientation, regrouping or geopetal infillings. Bioerosion is represented by rare and isolated holes. Pitted surfaces associated with wall pores are the most important corrasion features. Abrasion signs such as polished longitudinal and sutural ribs have been recognized. Fragmentation is common and it is controlled by the shape of the test rather than by the shell size or thickness. Different types and patterns of dissolution have been detected. Micritic infillings have been observed in most of the specimens; nevertheless, sparitic and pyrite cementations are also abundant. Neomorphism includes features such as inversions and recrystallization; pyrite and possibly silica replacements have been recognized. A great number of the specimens show calcitic crusts that obscure wall surfaces and may prevent identification. Mineralization is represented by sylvite crystals on the surface of some uppermost Toarcian and Aalenian foraminiferal shells. Fossil diagenetic distortion is frequent and affects the specimens independently of their morphology. Signals of reworking ("resedimentation") are common in the specimens. Two direct criteria for the recognition of reworking ("reelaboration") are shown for the first time on the foraminiferal shells. More research must be done to discern the history of the foraminiferal assemblages in order to achieve accurate biostratigraphical, paleoecological and paleobiogeographical interpretations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.