Atago Formation

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Atago Formation

Invalid synonym: Yudani Formation

Coherent formation
Pliocene - Pleistocene
Correlation: Ogura Member, Lower Most part

Sedimentary facies: Fluvial, Lacustrine
Lithofacies: Silt, Clay, Sands, Gravels
Sedimentary structures: Trough cross-stratification

Thickness: 150 m or thicker

Atago Formation
[ Upper ]
~~~~~~~~~~~~~~
Gunge Member
--------------
Aihara Member
~~~~~~~~~~~~~~
[ Lower ]

Osaka Group (south Awajishima, Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Goshikihama Formation
~~~~~~~~~~~~~~
Atago Formation
~~~~~~~~~~~~~~
[ Lower ]

Second Setouchi Supergroup (Osaka pref. - Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Osaka Group
~~~~~~~~~~~~~~
[ Lower ]

[ Upper ]
~~~~~~~~~~~~~~
Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Ichinomiya - Kareki, Awaji city, Hyogo pref.
Fossils (Plants): Cunninghamia konishii, Glyptostrobus pensilis, Pseudotsuga japonica, Sequoia sempervirens

Mizuno et al. (1990) Geology of the Akashi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)