dilluns, 15 d’abril de 2013

TURBIDITES EN ZONES LITORALS DE POCA PROFUNDITAT
TURBIDITAS EN ZONAS LITORALES DE POCA PROFUNDIDAD


TURBIDITES IN SHALLOW COASTAL AREAS


Aspecte de les turbidites al camp

 Turbidites to the field

Details of turbidites

Cenozoic rocks outcropping in the Baix Ebre
area, Tarragona, Spain, have been studied
. The lowermost unit <Pisolitic Clay>
is attributed to the Paleocene. The overlying units are Neogene
in age: the <Conglomerates of the Venta Ranxero>, unit wich is
attributed to the Miocene corresponds to midle alluvial fan deposits.
 
The <Siliceous Conglomerates of Anguera>> unit is attributed to
Late Miocene (Turolian) and records fluvial braided sedimentation.
Pliocene sedimentation began with the <Gravels and Sands
with Oysters> unit. This is a transgresive unit where we can
diferentiate foreshore and shoreface deposits. The <Blue Marls
of Carnpredó> unit is attributed to shallow marine deposits. Sandstone
deposited by high and medium storm density flows occur in this unit.
The <Onofre Limestonesn> unit corresponds to palustrine and
lacustrine deposits whit expansive and retractive sequences. The
uppermost unit <Roca Corba Conglomerates> unit correspond to
debris flow and braided fluvial deposites attributed to the Villafranchian.


ACTA GEOLOGICA HISPANICA (1990) 25(4): 271-287

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