Silasu Fm
Period:
Cretaceous
Age Interval:
Cenomanian (S-1)
Province:
Siberia southeast
Type Locality and Naming
Gorin zone of westernmost Sikhote-Alin.
Lithology and Thickness
"Mainly consists of aleuropelites [silty claystone], siltstones and siliceous tuffs with a total thickness of up to 900 m."
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Conformable overlies the Machtovaya Fm (Machtovaya unit)
Upper contact
Conformably overlain by Utitsa Fm
Regional extent
GeoJSON
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Fossils
"The lower part of the formation yields an upper Albian-lower Cenomanian inoceramid assemblage including Inoceramus cf. beringensis, I. ginterensis, I. aff. tenuistriatus, I. sichotealinensis, I. pressulus, I. cf. nipponicus, I. ex gr. concentricus."
Age
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
100.50
Ending stage:
Cenomanian
Fraction up in the ending stage:
0.5
Ending date (Ma):
97.20
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Igor N. Kosenko, Jingeng Sha and Boris N. Shurygin (2021). Upper Mesozoic stratigraphy of Sikhote-Alin (Russian Far East) and northeastern China: Non-marine and marine correlations. Part 1: Upper Jurassic-Hauterivian AND 2. Barremian-Aptian. Cretaceous Research, 124: articles 104811 (https://doi.org/10.1016/j.cretres.2021.104811) AND 104812 (https://doi.org/10.1016/j.cretres.2021.104812)