Older Dune

Abbr.: Do

Transversal dune
Coherent formation
Holocene
Contemporaneous heterotopic facies: Hashimoto Formation

Sedimentary facies: Sand dune
Sedimentary facies (Minor): Sandbar
Lithofacies: Sands
Lithofacies (Minor): Mud, Gravels, Volcanic ash
Sedimentary structures: Cross stratification, Parallel stratification

Thickness: 5 - 40 m
Distribution (Length): 10 km
Distribution (Width): 2.5 km
Upper limit: Conformity (Older Humic Soil)
Lower limit: Unconformity, partly unconformity (Katanishi Formation)

Noshiro Coastal Dune
[ Upper ]
+__+__+__+__+_
Younger Dune II
--------------
Younger Humic Soil
--------------
Younger Dune I
--------------
Older Humic Soil
--------------
Older Dune
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: North coast of Oga peninsula - Coast of north of Honshu island, Akita pref.
Distribution: Kashikodokoro, Noshiro city, Akita pref.; Asanai - Omagari, Noshiro city, Akita pref.
Tephra: Toya

Shiraishi et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.33-50 DOI
Fujimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.51-74 DOI
Ozawa et al. (1985) Geology of the Moritake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)
Ozawa et al. (1984) Geology of the Noshiro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 9p.)