Siyanov Fm
Period:
Cretaceous
Age Interval:
Late Cretaceous (S-9)
Province:
Siberia southeast
Type Locality and Naming
Pribrezhnoe Uplift
Lithology and Thickness
" caldera complexes of volcanic centers characterized by the Samarga Fm (Siyanov Fm) and Bogopol Fm consisting of lava and pyroclastic facies (ignimbrites included) of intermediate-basic and moderately acid compositions" (from Sakhno, V.G., Akinin, V.V. First U-Pb dating of volcanics from the East Sikhote-Alin belt. Dokl. Earth Sc. 418, 32–36 (2008). https://doi.org/10.1134/S1028334X0801008X)
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
Disconformably overlies the Primorye Gr (Monastyrka Fm).
Upper contact
Conformably overlain by the Bogopol Fm
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Campanian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
77.91
Ending stage:
Maastrichtian
Fraction up in the ending stage:
0.5
Ending date (Ma):
69.11
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)