Beshkent Fm
Period:
Paleogene
Age Interval:
Middle Eocene, K1, D1, C2, C2a, S5
Province:
SW Tajik, North Tajik, Central W Tajik
Type Locality and Naming
Includes in Khation Region, Sughd Region, Darvaz district, Dushanbe - west Shirkent-Luchob, Dushanbe - east Shirkent-Luchob.
Synonym:
Lithology and Thickness
Upper part (Gandzhin layers; 0 to 60 m) of greenish-grey calcareous mudstones with interbeds of marls, shell beds, limestones and sandstones. Lower part (Turkestan layers; 0 to 130 m) of greenish-grey mudstones with rare shell beds.
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Overlies the marl of the Jukar Fm.
Upper contact
Overlain by the sandstone of the lower Tochar Fm.
Regional extent
Afghan-Tajik Basin.
GeoJSON
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Fossils
Shell beds.
Age
Middle Eocene; arbitrarily placed as lower Lutetian for graphic purposes
Age Span:
Beginning stage:
Lutetian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
48.07
Ending stage:
Lutetian
Fraction up in the ending stage:
0.5
Ending date (Ma):
44.55
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Bosboom, R., Mandic, O., Dupont‐Nivet, G., Proust, J. N., Ormukov, C., & Aminov, J. (2017). Late Eocene palaeogeography of the proto‐Paratethys Sea in Central Asia (NW China, southern Kyrgyzstan and SW Tajikistan). Geological Society, London, Special Publications, 427, 565–588. https://doi.org/10.1144/SP427.11.