6533b7d5fe1ef96bd12644ca

RESEARCH PRODUCT

Upper Ovetian trilobites from Spain and their implications for the palaeobiogeography and correlation of the Cambrian Stage 3 in Gondwana

Gian Luigi PillolaJosé Antonio Gámez VintanedRodolfo GozaloEladio Liñán

subject

010506 paleontologybiologyTrace fossilBiostratigraphy010502 geochemistry & geophysicsbiology.organism_classification01 natural sciencesCambrian Stage 3TrilobiteGondwanaPaleontologyGeophysicsIchnofaciesCambrian Series 2CruzianaGeology0105 earth and related environmental sciencesEarth-Surface Processes

description

Abstract The upper part of the La Herreria Formation in Los Barrios de Luna (Leon Province, N Spain) has been revised from a palaeontological and biostratigraphical point of view. Two stratigraphic sections have been studied including their trilobite and ichnofossils contents. The ichnofossil assemblages have a high diversity of species characterising the Cruziana ichnofacies, suggesting a shallow sublittoral environment for the upper part of the La Herreria Formation. The trilobites species recognised are Lunagraulos antiquus , Dolerolenus formosus , Dolerolenus longioculatus , Lunolenus lunae , Metadoxides richterorum , Metadoxides armatus and Sardaspis ? sp. from the upper Ovetian (lower Cambrian Stage 3 under discussion by the ISCS). The new trilobite assemblages make possible a good correlation between the lower Cambrian formations of North Spain, Sardinia, South China and Siberia. Analysis of the palaeobiogeographical meaning of all trilobite genera that have been identified in the upper Ovetian of Spain shows a strong connection between the northern peri-Gondwana margin and west Gondwana, with a low latitude distribution for the Spanish trilobites at this time.

yearjournalcountryeditionlanguage
2016-06-01Tectonophysics
https://doi.org/10.1016/j.tecto.2016.01.003