Dalong Formation

Geology

Members: unnamed (378), Chaotian (9), Lower (3), Lower Mudstone (1), Middle (31), Mingyuexia (11), Upper (7)

Lithologies: "siliciclastic" (88), claystone (29), mudstone (173), "shale" (25), sandstone (8), marl (3), lime mudstone (27), chalk (2), framestone (1), "limestone" (30), chert (52), radiolarite (15), tuff (4)

Paleoenvironments: marine indet. (53), carbonate indet. (40), shallow subtidal indet. (1), slope/ramp reef (1), offshore ramp (13), offshore indet. (7), slope (6), basinal (siliceous) (46), offshore (5), basinal (siliciclastic) (64), deep-water indet. (199)

Age range: base of the Wuchiapingian to the top of the Griesbachian or 259.90000 to 250.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Wuchiapingian259.9 - 254.17China (Guangxi) (95183 95184 95185 95186)
Wuchiapingian259.9 - 254.17China (Hunan) (95749 107809 107814 107821 150514 162527)
Wuchiapingian259.9 - 254.17China (Anhui) (162514)
Wuchiapingian259.9 - 254.17China (Sichuan) (73822 148469 148470 148471 148472 148473)
Changhsingian254.17 - 252.17China (Guangdong) (29848 121650 121655 121678 123601 123606 123617 123628)
Changhsingian254.17 - 252.17China (Fujian) (51430 111968 111969 120024 120044 120076 120079 120097 121202 121403 121404 121405 121406 121407 121408 121427 121428 121429)
Changhsingian254.17 - 252.17China (Guizhou) (30000 30004 94906 94951 97301 98047 104960 112011 117464 117465 121092 121296 121411 121412 121618 121621 121624 121625 121632 121654 121656 121657 121659 121664 121674 121680 136845 136846 136847 136848 136839 136840 136841 136842 136843 136844 136834 136835 136836 136837 136838 149288 149290 149291 149292 149293 149294 149295 149296 149297 149298 149299 149300 149301 151124 151125 151126 151127 151130 151131 151132 151133 151134 197012 197013 197014 197015 197016 197017 197026 197027 197028 197029 197030 197031 197032 197033 197034 197035 197036 197037 197038 197039 197040 197041 197042 197043 197044 218367 218748 218749 218750 218751 218752 218753 218754 220736 220737 220739 220752 220753 220754 220755 220756 220757 220758)
Changhsingian254.17 - 252.17China (Jiangxi) (102131)
Changhsingian254.17 - 252.17China (Hunan) (51429 95263 95750 97259 97260 105910 105947 105948 107810 107813 107822 117540 121628 121635 121730 123423 123599 123629 123640 123641 124026 136849 136850 136851 136852 136853 136854 136855 162508 162509 162517 162526)
Changhsingian254.17 - 252.17China (Hubei) (95721 95722 105447 120809 121616 121617 121619 123607 123643 124009 124013 155318 162511 162512 162513 162528)
Changhsingian254.17 - 252.17China (Jiangsu) (43663 112384 44330 111748 112369 112372 112375 112389 121636 121639 136873 136874 136875)
Changhsingian254.17 - 252.17China (Anhui) (112371 112386 112396 121430 121431 121432 121615 136859 136860 136861 136862 136863 136864 136865 136866 136867 136868 136869 136870 136871)
Changhsingian254.17 - 252.17China (Sichuan) (29900 73823 73824 73825 73826 73827 73828 73829 73830 73831 73832 73833 73834 73835 73836 73837 88712 88713 95264 95265 98048 98049 111601 111602 111603 111604 111605 111606 111607 111608 111609 111610 111611 111613 111614 111617 121620 121627 121641 121642 121651 121652 121660 121661 121662 121666 121669 121681 121682 122172 122173 148458 148459 148460 148461 148462 148463 148464 148465 148466 148467 148468 220724 220725 220726 220727 220728 220729 220730 220731 220732 220733 220734)
Changhsingian254.17 - 252.17China (Guangxi) (29924 52900 52901 52902 56890 95262 95331 95332 95333 95334 95335 95336 95337 95338 95339 95340 95341 97089 97090 97091 97092 97093 97094 97095 97096 97097 97098 97099 97100 97101 97102 97103 97104 97105 97106 97107 97108 97109 97110 105919 105953 107296 107298 112397 112400 112404 112405 112424 112432 112433 120147 120789 121425 121426 121629 121631 121633 121634 121643 121653 121658 121668 121675 121676 123626 124010 124014 124015 124016 129996 138525 138526 138527 138530 138531 138541 142341 142342 142344 142345 142347 142348 142349 142351 142352 142353 142354 142355 162515 162516 162518 162519 162520 162521 162522 162523 221430 221431 221432 221433 221434 221435 221436 221437 221438 221439 221440 221441 221442 221450 221451 221452 221453 221454 221455 221456 221457 221458 221459 221460 221461 221462 221463 221464 221465 221466 221467 221468 221469 221470 221471 221472 221474)
Griesbachian251.902 - 250.5China (174677 174678)
Griesbachian251.902 - 250.5China (Guizhou) (197045)