Mishan-Guri Fm
Period:
Neogene
Age Interval:
Burdigalian, Ir3
Province:
Iran
Type Locality and Naming
Column: Iran East
Synonym: Guri Fm (schematic strat column spelling), Guri Mbr, Mishan Fm
Lithology and Thickness
In Iran East, approximately 2330 feet. It consists of low-weathering gray marl and ridge-forming ribs of shelly limestone. Basal 200 feet is made up of alternating shelly, "worm bed" limestone and marl. Guri Member consists of 370 feet of cream, hard, feature-forming, brown-weathering, fossiliferous limestone with thin bands of marl-stone.
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Regionally, in Iran East, it is the Gachsaran Fm
Upper contact
Regionally, in Iran East, it is the Agha Jari Fm
Regional extent
GeoJSON
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Fossils
Age
Middle through late Burdigalian
Age Span:
Beginning stage:
Burdigalian
Fraction up in beginning stage:
0.4
Beginning date (Ma):
18.67
Ending stage:
Burdigalian
Fraction up in the ending stage:
0.95
Ending date (Ma):
16.21
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Middle East Geological Timescale 2008 Al-Husseini, Journal of Middle East Petroleum Geosciences v 13, no. 4. James at. al., 1965, page 2216