D Alternation of Sandstone and Mudstone Member

D Alternation of Sandstone and Mudstone Member Akahane, 1975

Type locality: Shiun valley, Nadachi river, Nadachi ward, Joetsu city, Niigata prefecture
Coherent formation
Rift basin sediments
Miocene

Sedimentary facies: Marine
Sedimentary facies: Submarine fan (Sandy radial fan type)
Sedimentary facies: Middle part of the 2nd marine regression - transgression sequences
Sedimentary facies: Sandy turbidite
Lithofacies: Shale, Sandstone-dominant interbedded sandstone and mudstone
Lithofacies (Minor): Tuff

Thickness: ca. 170 - 200 m
Upper limit: Conformity (E Shale Member, F Alternation of Sandstone and Mudstone Member)
Lower limit: Conformity (C Alternation of Sandstone and Mudstone Member)

Nambayama Formation
[ Upper ]
--------------
J Alternation of Sandstone and Mudstone
--------------
I Alternation of Sandstone and Mudstone
--------------
H Alternation of Sandstone and Mudstone
--------------
G Shale Member
--------------
F Alternation of Sandstone and Mudstone Member
--------------
E Shale Member
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D Alternation of Sandstone and Mudstone Member
--------------
C Alternation of Sandstone and Mudstone Member
--------------
B Mudstone Member
--------------
A Alternation of Sandstone and Mudstone
--------------
[ Lower ]

Nishikubiki Group
[ Upper ]
--------------
Kawazume Formation
--------------
Nodani Formation
--------------
Nanbayama Formation
--------------
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Shiun valley - Kanba creek - Kuwatori river, Nadachi river, Nadachi ward, Joetsu city, Niigata pref.

Takano (2011) Jour. Geol. Soc. Japan, vol.117, no.4, pp.238-258 DOI
Akahane and Kato (1989) Geology of the Takada-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 3p.)