Sak slump

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Sak slump

Coherent formation
Forearc basin sediments
Pliocene

Lithofacies:
Sedimentary structures: Slump structures

Thickness: 0.2 - 5 m
Upper limit: An157
Lower limit: An156

Anno Formation
[ Upper ]
~~~~~~~~~~~~~~
Kunawa Sandstone Member
--------------
Sak slump
--------------
Amg slump
--------------
Tkw slump
--------------
Tak slump
--------------
[ Lower ]

Awa Group (Western part)
[ Upper ]
~~~~~~~~~~~~~~
Anno Formation
--------------
Kiyosumi Formation
--------------
Amatsu Formation
--------------
Kinone Formation
--------------
Sakuma Formation
~~~~~~~~~~~~~~
[ Lower ]

Awa Group (Eastern part)
[ Upper ]
~~~~~~~~~~~~~~
Anno Formation
--------------
Kiyosumi Formation
--------------
Amatsu Formation
--------------
Kinone Formation
--------------
Kanigawa Formation
?--?--?--?--?-
Fukawa Formation
~~~~~~~~~~~~~~
[ Lower ]

Mineoka Belt (Boso peninsula)
[ Upper ]
~~~~~~~~~~~~~~
Awa Group / Minamiboso Group
~~~~~~~~~~~~~~
Hota Group
::::::::::::::
Mineoka Group
?--?--?--?--?-
[ Lower ]

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

Distribution: Nagasaki - Iwamoto - Seki - Kunawa, Futtsu city, Chiba pref.

Nakajima and Watanabe (2005) Geology of the Futtsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 102p. (in Japanese with English abstract 8p.)