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Tsukuihama Member Okumura et al, 1977
- Type locality: Tsukuihama, Yokosuka city, Kanagawa prefecture
- Coherent formation
- late Pleistocene
- Water temperature: Cold ocean current
- Lithofacies: Gravels, Sands
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Sugaruya, Yokosuka city, Kanagawa pref.
- Fossils (Shellfishes): Acila divaricata, Acila insignis, Acila minutoides, Acmaea pallida, Adamnestia japonica, Ancilla hinomotoensis, Anomia cytaeum, Arca boucardi miyatensis, Arca plicata, Astarte hakodatensis, Barbatia stearnsii, Batillaria cumingii, Batillaria zonalis, Bittium binodulosum, Bittium urashimanaum, Bittium yokosukense, Calyptrea yokoyamai, Cancellaria laticostata, Cancellaria spengleriana, Cantharidus callichrous, Cantharidus yessoensis, Cardilia semisulcata, Cardita leana, Cardita nodulosa, Cardita toneana, Caryocorbula nipponica, Caryocorbula venusta, Cavolinia inflexa, Chama aspersa, Chama fragum, Chama retroversa, Chlamys farreri nipponensis, Chlamys jousseaumei, Chrysallida bicinctella, Cingulina cingulata, Clathrofenella reticulata, Clathromangelia leuckarti, Clathurella subauriformis, Clinocardium braunsi, Clinocardium califormiense, Clio pyramidata, Clipidina picta, Cocculina kuragiensis, Conotropin ornata, Crassatella nana, Crassatella oblongata, Crenella yokoyamai, Crithe cotamago, Cryptomiya busoensis, Cryptonatica janthostomoides, Cryptopecten sematensis, Cryptopecten vesiculosus, Curveulina aulata, Cuvierina columnella, Cymatium subpyrum, Cythara oyuana, Decorifer globosa, Decorifer insignis, Dentalium septentrionale, Diala varia, Diplodonta usta, Divarilima iwaotakii, Donax kiusiuensis, Dosinia sericea, Elaeocyma braunsi, Emarginula fragilis, Enida japonica, Ennucula cyrenoides, Ennucula nipponica, Epitonium kazusense, Epitonium sagamiense azumanum, Ergalatexta tokugawai, Eucheliclanculus bronni, Euchelus pauperculus, Eufenella pupoides, Eufenella rufocincta, Eufistulana granidis, Fulgoraria kamakurensis, Fulvia mutica, Fusinus muricatoides, Glossaulax reiniana, Glycymeris albolineata, Glycymeris pilsbryi, Glycymeris vestita, Glycymeris yessoensis, Haustator fortilirata, Hiatella orientalis, Homatopoma amussitatum, Homatopoma granuliferum, Homatopoma incornatum, Horaiclavus filicinctus, Horaiclavus shitoensis, Inquisitor jeffreysii, Kleinella neofelix, Lachryma callosa, Laevidentalium philippinarum, Leucotina adamsi, Leucotina dianae, Leucotina gigantia, Lienardia fuscolineolata, Limopsis adamsiana, Limopsis crenata, Limopsis nipponica, Limopsis tokaiensis, Liotinaria solidula, Lima quantoensis, Limaria hakodatensis, Lima vulgatula, Lima Zushiensis, Lirularia pygmaea, Lissotesta sobrina, Littorina manschurica, Lucinoma concentricum, Lyromangeria semicorinata, Machaeroplax delicatus, Macoma incongrua, Macoma nipponica, Mactra veneriformis, Magilus antiques, Mangelia tabatensis, Mangelia tokunagai, Mercenaria stimpsoni, Merelina tokunagai, Microdrillia sagamiensis, Microvoluta hondna, Mitrella bicincta, Mitrella burchardi, Mitrella lischkei, Modiolus nipponica, Monia umbonata, Murexsul cirrosus, Myadora ikehei, Myadora japonica, Mysella japonica, Neadmete japonica, Neocollonia pilula, Nemocardium samarangae, Noditerebra suavidica, Nuculana yokoyamai, Nucula tokyoensis, Olivella japonica, Olivella spretoides, Ostrea denselamellose, Parviconus ruberculosus, Patinopecten tokyoensis, Pecten albicans, Perrinia concina, Phasianella modesta, Pillucina lamyi, Placamen tiara, Polinices flemingianus, Polynemamussium alaskense, Polynemamussium intuscostatum, Porterius dalli obliquatus, Propebela yokoyamai, Protothaca adamsi, Punctoterebra lischkeana, Puncturella fastigiata, Puncturella nobilis, Pusia daedala, Pycnodonta musashiana, Pyrunculus phiala, Ranella galea, Reticunassa chibi, Reticunassa spurca, Retusa minima, Rhizorus acutaeformis, Ringicula driaris, Ruditapes variegatus kioroshiensis, Ruditapes philippinarum, Seila yokoyamai, Semeangulus miyatensis, Septifer keeni, Serpulorbis imbricatus, Serpulorbis medusae, Siphonochulus japonica, Spisula sachalinensis, Striarca tenebrica, Suchium costatum, Sulcomitrella bicinctella, Thraciopsis transmontana, Trichotropis unicarinata, Triphora conspersa, Triphora multigyrata, Triphora sematensis, Tristichotrochus consors, Tristichotrochus quaesits, Tritia japonica, Trivirostra edgari, Trophon candelabrum, Trophonopsis polycyma, Trophonopsis tenuisculptus, Tucetonella munda, Tugai decussata, Tugali vadososinuata, Turccia coreensis, Turritella nipponica miyata, Uberella yokoyamai, Venericardia ferruginea, Venericardia ferruginosa, Venus toreuma,
- Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)