PalkStrait MiddleMiocene Fm
Period:
Neogene
Age Interval:
Middle Miocene
Province:
SriLanka Palk Strait
Type Locality and Naming
Palk Strait (between Sri Lanka and India); composite of Wells Delft, PalkBay and Pesalai.
[Figure: Generalized geologic map of Sri Lanka (from Edirisooriya et al., 2016, Geol. Mag. 155:907-920)]
Lithology and Thickness
Limestone. 200 m (Delft well) to 300 m (PalkBay well) of white limestone (packstone) with abundant larger foraminifers
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Conformable on PalkStrait EarlyMiocene Fm
Upper contact
Conformably overlain by PalkStrait LateMiocene Fm
Regional extent
Found in Delft, PalkBay and Pesalai wells of Palk Strait (between Sri Lanka and southern tip of India)
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[78.95,10.03],[80.07,10.02],[80.03,9.05],[78.91,9.06],[78.95,10.03]]]]}}
Fossils
Benthic foraminifers of Miogypsina, Lepidocyclina, and Sphenolithus cf. heterosphus
Age
Middle Miocene
Age Span:
s
Beginning stage:
Langhian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
15.99
Ending stage:
Serravallian
Fraction up in the ending stage:
1.0
Ending date (Ma):
11.63
Depositional setting
Inner shelf
Depositional pattern:
Additional Information
Compiler:
Ravi Misra