Yixian Formation

Geology

Group: Jehol

Members: unnamed (141), 3 (5), Chaomidianzi (3), Dakangpu (7), Dawangzhangzi (16), Jianshangou (16), Jingangshan (4), Lujiatun (8), Zhuanchengzi (1)

Lithologies: not reported (39), "siliciclastic" (5), claystone (2), mudstone (104), "shale" (47), siltstone (11), sandstone (5), "volcaniclastic" (1), tuff (2)

Paleoenvironments: marine indet. (1), terrestrial indet. (24), fluvial indet. (6), fluvial-lacustrine indet. (6), lacustrine - large (116), lacustrine - small (2), lacustrine indet. (44)

Age range: base of the Late/Upper Jurassic to the top of the Early/Lower Aptian or 163.50000 to 122.46000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Jurassic163.5 - 145.0China (Liaoning) (29690 30087)
Late/Upper Jurassic - Early/Lower Cretaceous163.5 - 100.5China (Liaoning) (28322)
Berriasian145.0 - 139.8China (Liaoning) (157239)
Early/Lower Cretaceous145.0 - 100.5China (Hebei) (201151)
Valanginian - Hauterivian139.8 - 129.4China (Liaoning) (133789)
Hauterivian132.9 - 129.4China (Liaoning) (203179)
Late/Upper Barremian - Early/Lower Aptian130.0 - 122.46China (Liaoning) (10764 24899 25835 50467 50469 50468 50470 52888 55425 55682 55683 55709 73438 85298 87417 92626 94660 94819 100540 132600 137803 158243 196649)
Late/Upper Barremian - Early/Lower Aptian130.0 - 122.46China (Nei Mongol) (92651)
Barremian129.4 - 125.0China (Hebei) (155011)
Barremian129.4 - 125.0China (Liaoning) (13937 91199 115407 157196)
Barremian - Early/Lower Aptian129.4 - 122.46China (Nei Mongol) (91404)
Barremian - Early/Lower Aptian129.4 - 122.46China (Liaoning) (10761 49106 79488 79521 79522 92749 92806 92903 92908 117526 117527 117528 137794 156032 179655)
Barremian - Early/Lower Aptian129.4 - 122.46China (Hebei) (82758)
Barremian - Aptian129.4 - 113.0China (Nei Mongol) (79519 203213)
Barremian - Aptian129.4 - 113.0China (Hebei) (79520 116134)
Barremian - Aptian129.4 - 113.0China (Liaoning) (101022 126447 126448 127186)
Early/Lower Aptian125.45 - 122.46China (Liaoning) (36969 53493 55685 67611 73376 75472 75511 82783 83249 85288 92147 103832 105795 105809 106315 106966 110825 111710 111712 111714 111716 111717 111722 111725 112344 112845 115646 117536 117546 117609 118075 119030 119055 122554 123396 123433 123434 123444 123472 123510 123753 124759 132934 134420 137886 138325 138436 140222 140490 140491 141615 145247 145532 146277 147071 147827 148368 151518 151523 151524 151535 152003 152005 152052 153157 155018 155209 156322 156389 156531 156599 156600 156602 156606 157087 159020 163269 164497 164619 166709 166710 173379 176229 176345 181080 182836 184476 188103 190928 194296 197954 198092 198810)
Early/Lower Aptian125.45 - 122.46China (Nei Mongol) (68047 103654 106346 106347 117608 125655 125656 127184 133005 150366 154967 155049 156009 164498 173105 195760)
Early/Lower Aptian125.45 - 122.46China (Jilin) (155010 172382)
Early/Lower Aptian125.45 - 122.46China (Hebei) (106354 106355 107001 117452 117535 118035 118996 122917 155017 155048 155039 155154 155157 155160 155165 155166 155168 155171 155172 159021 160777 187587)
Aptian125.0 - 113.0China (Liaoning) (92906 31541 73687 117415 165516 194582 194604)