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Line 47: − − [[File:3.png|400px|thumbnail|Figure 3. Schematic section showing facies association A and B, by Tomassini et al.<ref name=Tomassini /> A) mixed ramp. B) siliciclastic platform.]]
The Neuquén Basin: Sequence Stratigraphy of Vaca Muerta Formation (view source)
Revision as of 14:52, 16 July 2015
, 14:52, 16 July 2015→Stratigraphy of Vaca Muerta Formation in El Trapial area
=== Facies 1: outer ramp restricted to basin ===
=== Facies 1: outer ramp restricted to basin ===
[[File:3.png|400px|thumbnail|Figure 3. Schematic section showing facies association A and B, by Tomassini et al.<ref name=Tomassini /> A) mixed ramp. B) siliciclastic platform.]]
These facies comprise alternating shale and laminated marl (containing radiolarians, fish scales and less ammonites and bivalves), among which are intrespersed intraclastic packstones (containing ammonites, bivalves and remains of bony fish), microbial bindstones having a fine lamination of irregular aspect and regular calcite sheets.
These facies comprise alternating shale and laminated marl (containing radiolarians, fish scales and less ammonites and bivalves), among which are intrespersed intraclastic packstones (containing ammonites, bivalves and remains of bony fish), microbial bindstones having a fine lamination of irregular aspect and regular calcite sheets.
According Tomassini et al.,<ref name=Tomassini /> these facies are interpreted as an environment of outer ramp, where periods of storm and good weather prevailed.
According Tomassini et al.,<ref name=Tomassini /> these facies are interpreted as an environment of outer ramp, where periods of storm and good weather prevailed.
=== Facies 3: offshore- offshore transition ===
=== Facies 3: offshore- offshore transition ===