%0 Journal Article
%T Impact of storms on Pliocene benthic foraminiferal assemblages of southwestern Spain
%A Gonz¨¢lez-Regalado
%A Mar¨ªa Luz
%A Ruiz
%A Francisco
%A Abad
%A Manuel
%A Civis
%A Jorge
%A Gonz¨¢lez Delgado
%A Jos¨¦ ¨¢ngel
%A Mu£¿oz
%A Juan Manuel
%A Garc¨ªa
%A Edith Xio Mara
%A Pend¨®n
%A Jos¨¦ Gabriel
%A Toscano
%A Antonio
%J Ameghiniana
%D 2009
%I Scientific Electronic Library Online
%X lithostratigraphical and faunal analyses of five pliocene sections located in the southwestern guadalquivir basin (s spain) permit reveal three main facies, which represent shallow marine fairweather conditions (fa-1), storm events (fa-2) and littoral/fluvial environments (fa-3). the vertical disposition of these facies indicates a regressive sequence. the statistical study of foraminiferal populations revealed five infralittoral and circalittoral assemblages. vertical and horizontal variations among these assemblages, the p/b ratio and four diversity indices, together with the mollusc distributions, suggest the presence of a shallow marine palaeoenvironment in this area in the lower pliocene, with an increasing depth towards the southwestern. the main effects from storm events on the foraminiferal faunas are a slightly decrease of individuals and species, and a marked drop in the p/b ratio. the poststorm conditions are characterized by: a) a higher number of individuals; b) a progressive increase in the p/b ratio and c) small increases in the remaining indices.
%K benthic foraminifera
%K storms
%K lower pliocene
%K sw spain.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S0002-70142009000200011&lng=en&nrm=iso&tlng=en