Jaffna Limestone Fm
Period:
Neogene
Age Interval:
Province:
Sri Lanka
Type Locality and Naming
[Figure: Generalized geologic map of Sri Lanka (from Edirisooriya et al., 2016, Geol. Mag. 155:907-920)]
Lithology and Thickness
Sandy limestone. Limestones and mottled sandy shales. Facies variation from calcareous to arenaceous facies is observed.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Unconformity on Precambrian
Upper contact
Conformity to overlying Kudremalai Limestone Fm ?
Regional extent
Developed in the northwest coastal tract (see location map)
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[80.87,9.11],[80.83,9.3],[80.22,9.87],[79.91,9.79],[80.4,9.49],[80.28,9.45],[80.06,9.6],[80.17,9.48],[80.06,9.39],[80.13,9.29],[80.07,9.02],[79.92,8.94],[79.96,8.72],[79.8,8.22],[79.81,7.7],[79.92,8.25],[80.03,8.59],[80.13,8.95],[80.29,9.21],[80.27,9.33],[80.36,9.31],[80.41,9.34],[80.58,9.24],[80.63,9.23],[80.82,9.05],[80.87,9.11]]]]}}
Fossils
Age
Early Miocene
Age Span:
s
Beginning stage:
Burdigalian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
20.45
Ending stage:
Langhian
Fraction up in the ending stage:
0.5
Ending date (Ma):
14.91
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Ravi Misra