Xianshuihe Formation

Geology

Members: unnamed (4), Lower (17), middle (13)

Lithologies: mudstone (14), sandstone (22)

Paleoenvironments: terrestrial indet. (32), delta plain (1)

Age range: base of the Early/Lower Oligocene to the top of the Late/Upper Miocene or 33.90000 to 5.33300 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Oligocene33.9 - 28.4China (Gansu) (53972 175349 176019 182883 182884 182898)
Late/Upper Oligocene28.4 - 23.03China (Gansu) (175379 175380 175381 175382 175383 176444 176451 176452 176453 176454 176455)
Early/Lower Miocene23.03 - 15.97China (Gansu) (182896 53973 53974 53975 175341 175342 175343 175344 175345 175346 175347 175348 182897 231953)
Burdigalian20.44 - 15.97China (Gansu) (42065)
Middle Miocene - Late/Upper Miocene15.97 - 5.333China (Nei Mongol) (28781 28783)