%0 Journal Article
%T Carbonate ramp facies at the Calabozo Formation (Middle Jurassic), Mendoza, Argentina
%A Cabaleri
%A Nora G.
%A Armella
%A Claudia
%A Cagnoni
%A Mariana
%A Ramos
%A Adriana
%A Valencio
%A Susana A.
%J Revista geol¨®gica de Chile
%D 2003
%I Scientific Electronic Library Online
%R 10.4067/S0716-02082003000200004
%X the limestones of the calabozo formation of early callovian age, crop out in the neuqu¨¦n basin, southwestern mendoza province, argentina. facies/microfacies analysis at arroyo el plomo, west of malarg¨¹e, shows that the limestones of the calabozo formation originated during a transgressive /regressive episode over the delta-margin facies of the lajas formation (late bajocian-callovian), with a change from siliciclastic to carbonate sedimentation. an extensive layer of floatstone marks the beginning of this stage. within a ramp environment, a well represented mid-ramp subenvironment can be distinguished, consisting of a subtidal facies arrangement (wackestones, packstones, packstones with channels and floatstones) and an inner ramp subenvironment, characterized by a system of ooidal bars (grainstones) with tidal channels (floatstones) and predominantly intertidal facies passing into peritidal, and supratidal facies (boundstones). three shallowing-upward cycles were recognized, the lower and middle ones being characteristic of the mid- ramp. the upper cycle is the best developed and consists of a middle ramp lower hemicycle and an inner ramp upper hemicycle. the calabozo formation is capped by deposits corresponding to a supratidal environment with restricted circulation, on top of which the evaporitic succession of the early callovian t¨¢banos formation is developed
%K lmestones
%K palaeoenvironmental analysis
%K callovian
%K neuquina basin
%K argentina.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0716-02082003000200004&lng=en&nrm=iso&tlng=en