%0 Journal Article
%T AMONITAS DE UN NIVEL DE ALTA ENERG¨ªA DEL BARREMIANO INFERIOR EN LA FORMACI¨®N PAJA DE LOS SECTORES DE VILLA DE LEYVA (BOYAC¨¢) Y DE V¨¦LEZ (SANTANDER)
%A Patarroyo
%A Pedro
%J Boletin de Geolog¨ªa
%D 2009
%I Scientific Electronic Library Online
%X in different areas near v¨¦lez (santander) as la paz, chipat¨¢, bol¨ªvar and guavat¨¢ it was identified a stratum with variable thickness, biostratonomy and characteristic fossil association. this bed had already been recognized in the villa de leyva (boyac¨¢) area, and located to the lower barremian into the lowest multicolor mudstones level strata of the paja formation. the chaotic accumulation of molluscs fragments, complete ammonites, trunks and foraminifera is its principal characteristic, which makes its easy recognition in the field. to villa de leyva was possible to identify into the bed crioceratites sp., acrioceras julivertii etayo-serna, pseudohaploceras incertum (riedel), nicklesia pulchella (d£¿orbigny), acanthoptychoceras trumpyi kakabadze & thieuloy, phylloceras sp., buergliceras buerglii etayo-serna, valdedorsella sp. y karsteniceras beyrichi (karsten). to v¨¦lez area pedioceras sp., nicklesia pulchella (d£¿orbigny), acanthoptychoceras trumpyi kakabadze & thieuloy, buergliceras buerglii (etayo-serna) y pseudohaploceras incertum (riedel). the ammonite association indicates the nicklesia pulchella biozone of the colombian early barremian. the recognition of this level with a high-energy accumulation to the areas of villa de leyva and v¨¦lez can be indicating a regional distribution of a sedimentary event with these characteristics to the lower part of the barremian from colombia, which could be setting a sequence boundary to the basis of a high-energy transgressive system.
%K early barremian
%K paja formation
%K villa de leyva (boyac¨¢)
%K v¨¦lez (santander)
%K .
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-02832009000200001&lng=en&nrm=iso&tlng=en