Jama Formation

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Jama Formation
Stratigraphic range: Pliocene-Early Pleistocene
(Montehermosan-Ensenadan)
~5.3–0.8  Ma
O
S
D
C
P
T
J
K
Pg
N
Type Geological formation
Lithology
Primary Claystone, sandstone
Location
Coordinates 0°12′S80°18′W / 0.2°S 80.3°W / -0.2; -80.3
Approximate paleocoordinates 0°18′S79°54′W / 0.3°S 79.9°W / -0.3; -79.9
Region Manabí Province
Country Ecuador
Type section
Named for Jama
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Jama Formation (Ecuador)

The Jama Formation is a Pliocene to Early Pleistocene (Montehermosan to Ensenadan in the SALMA classification) geological formation in Ecuador. The claystones and sandstones were deposited in a coastal environment. The age of the Jama Formation is constrained by 40Ar/39Ar dating of tephra beds. [1] The formation is correlated to the Charco Azul Formation of western Panama and southeastern Costa Rica. [2]

Contents

Subdivision

The formation is subdivided in, from top to base:

Fossil content

The formation has provided bivalve, gastropod and scaphopod fossils.

See also

References

Further reading