Tachikawa 1 Formation

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Tachikawa 1 Formation (Machida, 1971) Ueki and Sakai, 2007

Type locality: Nishimotomachi town, Kokubunji city - Wakamatsu town, Fuchu city, Tokyo
Coherent formation
late Pleistocene (ca. 40 ka, MIS 3)

Sedimentary facies: Fluvial
Lithofacies: Gravels

Thickness: several m
Upper limit: Unconformity (Tachikawa Loam)

Tachikawa Terrace Deposit
[ Upper ]
~~~~~~~~~~~~~~
Tachikawa 2 Formation
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Tachikawa 1 Formation
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[ Lower ]

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

Distribution: Nishimotomachi town, Kokubunji city, Tokyo; Wakamatsu town - Tama town, Fuchu city, Tokyo; Maehara town, Koganei city, Tokyo; Osawa, Mitaka city, Tokyo; Tsutsujigaoka, Chofu city, Tokyo; Todoroki, Setagaya ward, Tokyo; Setooka, Akiruno city, Tokyo

Ueki and Sakai (2007) Geology of the Ome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 189p. (in Japanese with English abstract 5p.)