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HELICAL CRUSTACEAN BURROWS: GYROLITHES ICHNOFABRICS FROM THE PLIOCENE OF LEPE (HUELVA, SW SPAIN)

2019; Society for Sedimentary Geology; Volume: 34; Issue: 1 Linguagem: Inglês

10.2110/palo.2018.084

1938-5323

Fernando Muñiz Guinea, Zaín Belaústegui,

Geology and Paleoclimatology Research

Research Article| January 11, 2019 HELICAL CRUSTACEAN BURROWS: GYROLITHES ICHNOFABRICS FROM THE PLIOCENE OF LEPE (HUELVA, SW SPAIN) FERNANDO MUÑIZ; FERNANDO MUÑIZ 1Departamento de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla (US), Avda. Reina Mercedes 6, E-41012 Sevilla, Spain Search for other works by this author on: GSW Google Scholar ZAIN BELAÚSTEGUI ZAIN BELAÚSTEGUI 2Departament de Dinàmica de la Terra i de l'Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain 3IRBio (Biodiversity Research Institute), Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information FERNANDO MUÑIZ 1Departamento de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla (US), Avda. Reina Mercedes 6, E-41012 Sevilla, Spain ZAIN BELAÚSTEGUI 2Departament de Dinàmica de la Terra i de l'Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain 3IRBio (Biodiversity Research Institute), Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain email: zbelaustegui@ub.edu Publisher: SEPM Society for Sedimentary Geology First Online: 11 Jan 2019 Online Issn: 1938-5323 Print Issn: 0883-1351 Copyright © 2019, SEPM (Society for Sedimentary Geology) PALAIOS (2019) 34 (1): 1–14. https://doi.org/10.2110/palo.2018.084 Article history First Online: 11 Jan 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FERNANDO MUÑIZ, ZAIN BELAÚSTEGUI; HELICAL CRUSTACEAN BURROWS: GYROLITHES ICHNOFABRICS FROM THE PLIOCENE OF LEPE (HUELVA, SW SPAIN). PALAIOS 2019;; 34 (1): 1–14. doi: https://doi.org/10.2110/palo.2018.084 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 SocietyPALAIOS Search Advanced Search ABSTRACT Two ichnofabrics characterized by abundant vertical and helical burrows (ichnogenus Gyrolithes) are described from the Pliocene siliciclastic facies of the southwestern sector of the Guadalquivir Basin (Lepe, Huelva, SW Spain). These ichnofabrics, associated with shallow and marginal marine environments, characterize two consecutive and concordant stratigraphic units: (1) the lower one is dominated by G. nodosus (together with other pellet-lined ichnotaxa), occurs in fine- to medium-grained, massive sands and silty sands, and is characterized by moderate to high bioturbation; (2) the upper ichnofabric is dominated by G. variabilis (and other unlined ichnofossils), occurs in sandy silts, and is characterized by low to high bioturbation. The transition of these two ichnofabrics clearly reflects the ability of an infaunal community to assimilate environmental changes over time. Additionally, new observations at the type locality of G. nodosus, the description of a new locality for G. variabilis and review of existing literature on this ichnogenus have provided the bases for emending the diagnoses of both ichnospecies, to propose a neotype for G. nodosus and to suggest a new type locality for G. variabilis. According to the main architectural features of Gyrolithes specimens studied herein and by comparison with modern analogues, 'thalassinidean' shrimps are proposed as their most likely tracemakers. Although it is known that these kinds of crustaceans exhibit a great variability in regards to their burrowing behaviors, further study is needed in order to more fully understand the purpose of these helical bioturbation structures. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.