Seca Formation, Ecuador

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Seca Formation
Stratigraphic range: Late Eocene
(Divisaderan-Tinguirirican)
~37–34  Ma
O
S
D
C
P
T
J
K
Pg
N
Type Geological formation
Unit of Ancón Group
Underlies Punta Ancón Formation
Overlies Socorro Formation
Lithology
Primary Shale
Location
Coordinates 2°18′S80°48′W / 2.3°S 80.8°W / -2.3; -80.8
Approximate paleocoordinates 4°48′S73°48′W / 4.8°S 73.8°W / -4.8; -73.8
Region Santa Elena Province
Country Ecuador
Extent Progreso Basin
Equador physical map.svg
Orange pog.svg
Seca Formation, Ecuador (Ecuador)

The Seca Formation is a Late Eocene (Divisaderan to Tinguirirican in the SALMA classification) geologic formation of the Progreso Basin in southwestern Ecuador. The shales of the formation have provided fossils of the marine snake Pterosphenus sheppardi . [1]

Contents

Description

The Seca Formation, part of the Ancón Group, conformably overlies the Socorro Formation and is overlain by the Punta Ancón Formation. The Seca Formation comprises grey to greenish shales deposited in a marine platform with submarine fans environment. [2] The formation is a reservoir rock, [3] and potential source rock, [4] in the oil-rich Progreso Basin.

See also

References

  1. Ancón at Fossilworks.org
  2. Lorenzo et al., 2018, p.34
  3. Lorenzo et al., 2018, p.32
  4. Lorenzo et al., 2018, p.31

Bibliography

Further reading