Ryukyu Formation, Group

Geology

Formations: unnamed (77), Chinen (4), Haneji (4), Hateruma (2), Itokina (1), Miyako-jima (16), Naha (70), Nakoshi (1), Okierabu-jima (1), Sobe (25), Takanasaki (2), Takigawa (2), Wan (1)

Members: unnamed (11)

Lithologies: not reported (4), claystone (1), siltstone (4), sandstone (17), marl (1), travertine (1), grainstone (66), "reef rocks" (2), rudstone (1), framestone (1), "limestone" (193)

Paleoenvironments: marine indet. (12), carbonate indet. (23), lagoonal/restricted shallow subtidal (67), reef, buildup or bioherm (98), perireef or subreef (8), coastal indet. (8), deep-water indet. (1), fissure fill (4)

Age range: base of the Early/Lower Pliocene to the top of the Holocene or 5.33300 to 0.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Pliocene5.333 - 3.6Japan (Okinawa) (42229 42230 42231 42232 42234 42238 42315 42317 42318)
Early/Lower Pliocene5.333 - 3.6Japan (96673 96674 96675 96676)
Late/Upper Pliocene3.6 - 2.588Japan (Okinawa) (42291 42292 42293 42294 42295 42296 42299 42301 42306 42312 42383)
Early/Lower Pleistocene2.588 - 0.781Japan (87989 87990 87992 87996)
Early/Lower Pleistocene2.588 - 0.781Japan (Okinawa) (42344 42345 42346 42347 42348 42349 42350 42351 42354 42357 42358 42359 42360 42361 42362 42363 42380)
Early/Lower Pleistocene - Middle Pleistocene2.588 - 0.129Japan (81575 81578 81580 81581 81582 87892 87893 87894 87895 87898 87976 87977 87978 87979 87980 87981 87982 87983 87984 87985 87986 87987 87988 87998 88000)
Pleistocene2.588 - 0.0117Taiwan (204438)
Pleistocene2.588 - 0.0117Japan (Okinawa) (76047 76048)
Pleistocene2.588 - 0.0117Japan (Ryukyu Islands) (48721 204377)
Calabrian1.8 - 0.774Japan (Okinawa) (42233 42235 42236 42316 190211 190264 190242 190245 190249)
Calabrian - Middle Pleistocene1.8 - 0.129Japan (Okinawa) (190260 42297 42298 42300 190222 42302 190218 42303 42304 42305 42307 190214 42308 190213 42309 190210 190226 190227 122849 122887 190212 190216 190217 190219 190220 190221 190223 190224 190225 190228 190229 190230 190231 190232 190234 190238 190239 190240 190241 190243 190244 190246 190247 190248 190250 190251 190252 190255 190257 190261 190262 190265)
Chibanian0.774 - 0.129Japan (Okinawa) (190233)
Middle Pleistocene0.774 - 0.129Japan (Okinawa) (42352 42353 42355 42356 62769 62770 62771 62772 62773 62774 62775 62776 62777 62778 62779 62780 62781 62782 62783 62784 62785 62786 62787 62789 62790 62791 62793 62794 62795 62796 62797 190235 190253 190254 190256 190258 190259 190263)
Middle Pleistocene0.774 - 0.129Japan (88039 88040 88041 88042 88043 88044 88047 88048 88050 88051 88052 88053 88054 88055 127188 127189)
Middle Pleistocene - Late/Upper Pleistocene0.774 - 0.0117Japan (127201 127200 127199 127198 127190)
Late/Upper Pleistocene0.129 - 0.0117Japan (Okinawa) (42382 62788 191058 191059 191060 191061)
Late/Upper Pleistocene0.129 - 0.0117Japan (88595 88596 88886 89236 127202 92589)
Late/Upper Pleistocene0.129 - 0.0117Japan (Ryukyu) (41603 41604 41605 41606)
Holocene0.0117 - 0.0Japan (Okinawa) (222395 222396 222397 222398 222399 222400 222401 222402 222403 222404)