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Home , Anabarites, Bashkirian, Changaspis, Changhsingian, Clarkina, Distomodus

Time Scale and Sea-Level History Sponsored, in part, by: Time

ScaLe R Creator Updated by James G. Ogg (Purdue University) and Gabi Ogg to: 2004 Cen Mesozoic (Gradstein, F.M., Ogg, J.G., Smith, A.G., et al.2004) Paleozoic ICS and The Concise Geologic Time Scale (Ogg, J.G., Ogg, G. & Gradstein, F.M., 2008)

Paleozoic Sequences -- Haq and Schutter (Science, 2008) Paleozoic Sequences -- Geo- Standard magnetic other studies Mega- Sequences Coastal Onlap and Mean Sea- Paleozoic Long- and Medium- Polarity - Fusulinids and Benthic Sequences (nomenclature by Level (intermediate term) Short-Term Sea Level Resolution Perm- Ammonoid Zonation Zonation T-R Cycles Foraminifer Zonation Period Primary of Sloss J. Ogg) 0 100 200m 0 100 200m Devon Sequences Upper meishanensis Chang-3 251.5 R T Palaeofusulina sinensis - 251.8 Clarkina yini Parananlingellia end-Perm 252.23 end-Perm Iranites Clarkina changxingensis Chang-2 252.5 252.89 Clarkina subcarinata 253.02 Palaeofusulina minima Clarkina wangi 253.8 Chang-1 253.8 Chang-1? 253.8

254.57 Clarkina orientalis 255 255.12 Araxoceras Paradunbarulla

Wuch-2 256.0 Clarkina transcaucasica Tansill/Wuch-2 256.44 Clarkina guangyuanensis 257.32 Clarkina leveni

258.47 Roadoceras, Doulingoceras Codonofusiella Clarkina asymetrica Clarkina dukouensis Illawara 260 Clarkina postbitteri postbitteri 260.4 Wuch-1 260.4 Tansill/Wuch-1 260.5 Tansill/Wuch Clarkina postbitteri hongshuiensis 261.04

Cap-3 262.0 261.85 altudaensis 262.5 Rauserella Cap-2 263.0 Timorites Yates 263.3

264.12 Jinogondolella postserrata 265 Afganella schenki 265.8 Cap-1 265.8 265.9 266.15 Seven Rivers 266.1 Afganella tereshkovae Word-3 266.5 266.58 266.7 Word-2 267.0 Jinogondolella aserrata Queens 267.05 267.25 Neoschwangerina tenuis Word-1 267.5 Waagenoceras 268.0 267.77 268.0 Graysburg 268.2 Road-2 268.4 268.35 Upper San Andres I 268.78 Cancellina 269.28 269.17 Jinogondolella nankingensis Brushy Canyon 269.56 Brushy Canyon 270 270.26 Skinerella 270.6 Road-1 270.6 Road Canyon II 270.49 270.7 Road Canyon I 270.8 Kung-3d 270.95 Neostreptognathodus 271.15 Kung-3c 271.3 Iren -2 sulcoplicatus Kung-3b 271.65 Kung-3a 272.0 Praeskinnerella pavlovi

272.6 272.71 Neostreptognathodus prayi Iren 273.1 Kung-2 273.5 273.35 Filippov 273.6 Filippov 274.34 Neostreptognathodus pnevi Brevaxina 275 275.1 275.6 Kung-1 275.6 Saran 275.6

Neostreptognathodus 276.68 Aktubinskia, Artinskia, Chalaroschwagerina vulgaris 277.05 Neopronorites pequopensis

278.0 Permian Art-3 Sargin 278.5 Parafusulina

279.75 279.63 280 Irgin 3 280.0 280.37 Irgin 2 280.75 whitei Art-2 281.5 Irgin 281.89 Pseudofusulina 282.81 Barneston 2 283.14

284.4 Art-1 284.4 284.4 Barneston 1 284.6 Burslev (Barneston) 285 Lower Absaroka 285.35 285.33 Sweetognathus binodosus

Cisuralian Kinney 286.06 Zigarella urdalensis - Z. Sak-7 286.5 286.79 plicatissima 287.18 Wreford 2 287.51 Sak-6 288.0 288.24 288.64 Sakmarites Wreford 1 288.97

Sakmarian Sak-5 289.6 289.7 290 290.23 Sweetognathus merrilli - Funston 290.43 Funston Schwagerina vernueili uralensis Sak-4 291.0 291.16 291.3 Kiaman Reversed- polarity Hyperchron Sak-3 292.0 Crouse 291.89 292.36 292.61

Sak-2 293.2 Middleburg 293.34 293.69 Schwagerina moelleri

294.6 Sak-1 294.6 294.6 Eiss 294.8 295 295.02 Lenox Hills (Eiss) barskovi 295.38 Sphaeroschwagerina gigas Ass-3 295.8 Svetlanoceras Streptognathodus postfusus 295.98 Beattie 2 295.97 Ass-2 296.7 296.57 Streptognathodus fusus Pseudoschwagerina robusta Beattie 1 297.17 297.5 297.76 Neal Ranch (Upper Streptognathodus constrictus Schwagerina nux Up. Grenola (Neva) 298.34 Grenola) Sphaeroschwagerina fusiformis 298.68 299.0 Red Eagle 3 Streptognathodus isolatus Sphaeroschwagerina vulgaris Ass-1 299.0 Red Eagle 2 299.03 Red Eagle Streptognathodus wabaunsensis Daixina bosbytauensis - 299.68 299.73 Foraker 2 299.84 Foraker 2 Globifusulina robusta 300 299.99 Shumardites Streptognathodus bellus Gzh-3 300.5 Daixina sokensis 301.02 F (Tarkio) 301.46 F of Heckel'08 301.8 Streptognathodus virgilicus Gzh-2 Howard 301.86 Jigulites jigulensis Topeka 302.26 Shumardites - Vidrioceras 302.65 Deer Creek 302.67 Streptognathodus vitali Rauserites rossicus - Rauserites Lecompton 303.4 303.08 Streptognathodus simulator stuckenbergi Gzh-1 303.5 Oread 303.48 Oread Streptognathodus firmus 303.98 E (Cass) 303.89 E of Heckel'08 Stanton 304.29 Stanton Late Penn. toretzianus Rauserites quasiarcticus Kas-3 304.7 D (Iola) 304.7 D of Heckel'08 304.9 305 Dewey 305.1 (Dennis) 305.5 C (Dennis) C of Heckel'08 Kas-2 305.51 Streptognathodus cancellosus Montiparus montiparus 305.98 Swope 305.91 Swope Idiognathodus sagittalis B (Hertha) 306.32 B of Heckel'08 Pseudoparalegoceras - "Swadelina" makhlinae Protriticites pseudomontiparus - Kas-1 306.7 Lost Branch 306.72 Wellerites Obsoletes obsoletus 307.2 Altamont 307.13 Streptognathodus subexcelsus 307.26 Fusulina cylindrica - Protriticites Pawnee 307.53 roundyi Fort Scott 2 307.94 Lower Fort Scott ovatus Neognathodus inaequalis Mosc-3 308.3 A (Verdigris) 308.34 308.51 A of Heckel'08 Fusulinella bocki Tiawah/Inola 308.75 Neognathodus medexultimus - Mosc-2 309.0 McCurtain Idiognathodus podolskensis Fusulinella colaniae - F. Don./McCurtain 309.15 McCurtain Moscovian Streptognathodus concinnus - voshgalensis - Beedeina kamensis 310 309.92 Idiognathodus robustus Fusulinella subpulchra 310.21 Paralegoceras - Eowellerites Finnie 310.56 Neognathodus medexultimus - Priscoidella priscoidea 310.95 Neognathodus bothrops Middle Penn. Grindstaff Mosc-1 311.3 Diaboloceras - Winslovoceras Streptognathodus transitivus Aljutovella aljutovica 311.7 311.6 311.7 donetzianus - Bash-7 312.3 Diaboloceras - Axinolobus Verella spicata - Alj. tikhonovichi Pounds 312.45 postsulcatus 312.65 Profusulinella rhombiformis Declinognathodus Bash-6 313.3 313.19 Branneroceras - Gastrioceras Profusulinella primitiva - 313.6 marginodosus Bostwich 313.94 Pseudostaffella gorskyi Bash-5 314.3 314.35 Idiognathodus sinuosus Staffellaeformes staffellaeformis - Pseudostaffella praegorskyi 314.95 Bilinguites - Cancelloceras 315 Neognathodus askynensis Bash-4 315.6 Trace Creek 315.57 Pseudostaffella antiqua Bash-3 316.0 315.82 316.18 Early Penn. Dye - Kessler 316.39 Idiognathoides sinuatus Semistaffella variabilis - Bash-2 316.7 316.64 Reticuloceras - Bashkortoceras 316.9 Semistaffella minuscilaria Prairie Grove 2 317.39 Prairie Grove 2 Bash-1 317.5 317.44 Homoceras - Hudsonoceras Declinagnathodus noduliferus Plectostaffella bogdanovkensis 318.1 Cane Hill 317.92 318.01 ( hiatus in Eurasia ? ) ( hiatus in Eurasia ? ) ( regional hiatus ? )

318.93 Serp-9 319.2 319.59 Imo 319.77 Imo Monotaxinoides transitorius 320 Serp-8 320.5 320.49 320.86 Fayettevillea - Delepinoceras bilineatus bollandensis Serp-7 321.7 322.09 Degonia 322.07 Degonia 322.27 Eostaffellina protvae Clore 322.86 Serp-6 323.0 322.95 323.35 Menard 323.7 Serp-5 324.0 323.81 324.3 Late Miss. Tar Springs 324.6 Tar Springs 324.71 Uralopronorites - Cravenoceras Neoarchaediscus postrugosus 325 Serp-4 325.0 Lochria cruciformis Hardinsburg 325.5 325.56 325.61

Fraileys 326.4 Serp-3 326.6 326.58 326.8 Serp-2 327.4 Cypress 327.82 327.99 328.3 328.3 Lochria nodosa

Bethel 329.24 Serp-1 329.4 329.41 329.6 330 Vis-7 330.2 330.62 Yankeetown 330.65 330.83 Endothyranopsis crassus - Hypergoniatites - Ferganoceras Archaediscus gigas 331.6 Vis-6 Aux Vases 331.77 Gnathodus bilineatus bilineatus 332.02 332.08

Vis-5 332.8 Ridenhower - Ste. Genevieve 333.02 333.25

334.08 St Louis 333.95 335 334.9

Salem (upper) 335.84 336.0 Salem (upper) Vis-4 336.17 Visean 337.44 Endothyranopsis compressa - Salem (lower) 337.9 Pararchaediscus kokjubensis Middle Miss.

339.2 Gnathodus texanus Vis-3 Beyrichoceras - Goniatites

340 Mixed 340.53 340.61 Uralodiscus rotundus Carboniferous

Warsaw 341.52 341.99

Vis-2 343.0 Eoparastaffella simplex - 343.41 343.6 Keokuk (Upper) Keokuk (Upper) Eoendothyranopsis donica 343.94 Vis-1 344.5 344.92 345 345.3 345.53 Tour-5 345.7 Keokuk (Lower) Merocanites - Ammonellipsites Scalliognathus anchoralis

Upper 346.54 Endothyra elegia - Eotextularia 346.88 diversa Dollimae bouckaerti

Tour-4 348.5 Gnathodus typicus Spinoendothyra costifera

349.5 350 Protocanites - Pericyclus isosticha Palaeospiroplectammina Tour-3 351.0 Meppen 350.86 tchernyshinensis 351.32 351.69 Siphonodella quadruplicata

Tournaisian Chouteau 352.43 Chouteau

Tour-2 353.3

Early Miss. Siphonodella belkai Chernyshinella disputabilis 354.31 355 Protocanites - Gattendorfia 355.37 Bisphaera malevkensis - Siphonodella duplicata Earlandia minima

Hannibal 357.12

Tournayellina pseudobeata - Siphonodella sulcata Septatournayella njumylga 358.99 359.2 Tour-1 359.2

360 359.92

Fam-8 361.0 Siphonodella praesulcata Glen Park 361.5 Glen Park Wocklumeria 361.96

363.03 Fam-7 363.4 363.79 364.2 Clymenia gracilis expansa

365 364.94

Fam-6 365.7 365.78 Platyclymenia Palmatolepis perlobata postera 365.91 II f II f 366.09 Fam-5 366.4 366.84 Palmatolepis rugosa trachytera 367.31 Prolobites 367.5

Kaskaskia Fam-4

368.5 Palmatolepis marginifera 369.15 369.3 370 Fam-3 370.0

370.8 Palmatolepis rhomboidea

371.44 Cheiloceras Fam-2 372.0 372.01 372.28 Palmatolepis crepida

Late 372.88

373.58 Palmatolepis triangularis II e 374.04 II e 374.27 374.5 Fam-1 374.5 374.78 375 Fras-8 375.2 Palmatolepis linguiformis 375.56 Fras-7 376.0 376.12 376.72 377.2 377.42 Palmatolepis rhenana Fras-6 377.6 II d 378.09 Palmatolepis jamieae Fras-5 379.0

379.72 379.56 Poorly known Palmatolepis hassi 380 379.86 Manticoceras 380.27 Fras-4 380.8 380.89 381.4 Palmatolepis punctata II c 381.74 Fras-3 382.0 Palmatolepis transitans 383.0

Fras-2 384.0 Mesotaxis falsiovalis 384.68 385 385.3 385.3 Fras-1 385.5 385.59 Giv-7 385.9 Skeletognathus norrisi 386.02 385.89 Giv-6 386.2 II b 386.28 386.79 Klapperina disparilis Pharciceras Giv-5 387.5 387.25 Schmidtognathus hermanni 388.0 387.84 388.23 Givetian Giv-4 388.4 389.04 389.49 varcus 390 Giv-3 390.0 II a 390.37 II a 390.5 390.46 Maenioceras 390.64 Giv-2 391.0 Devonian 391.12 391.21 391.31 Polygnathus hemiansatus 391.8 Giv-1 391.6 391.88 Middle Eif-3 392.3 Polygnathus xylus - ensensis 392.45 392.6 Eif-2 392.8 393.0 I f 392.94 Eif-1 393.3 I e 393.37 Tortodus kock. kockelianus 393.98 Pinacites Tortodus kock. australis Eifelian 394.76 395 Ems-8 395.0 I d 394.94 395.16 395.19 Lower Ems-7 395.4 Polygnathus costatus costatus

396.56 396.65 Polygnathus costatus partitus

397.5 Ems-6 397.5 397.5

398.3 Anarcestes Polygnathus costatus patulus 398.93 Ems-5 399.5 400 Polygnathus serotinus 400.35 I c 400.35 I c

Ems-4 401.2 Polygnathus inversus Emsian 402.54 402.6 402.73 Polygnathus nothoperbonus Anetoceras 404.0 Ems-3 404.17 404.34 Polygnathus gronbergi / hyperchron Sayan (Rn) excavatus 405 404.9 Graptolite Zones Ems-2 406.0 Polygnathus kitabicus 406.45 407.0 Ems-1 407.0 yukonensis Early 407.74 Polygnathus pireneae 408.35 408.32

Pragian I b 409.21 I b Eognathodus sulcatus kindlei Monograptus falcarius

410 Prag-1 410.0 409.94 Eognathodus sulcatus sulcatus 410.82 410.78 411.2 I a 411.2 I a Loch-4 411.5 Only straight ammonoids known Pedavis pesavis Monograptus hercinicus 412.5 delta Loch-3 413.5 414.0 - Ozarkodina eurekaensis Loch-2 414.5 Monograptus praehercynicus, M. 414.85 Sea Level uniformis 415 woschmidti - Loch-1 415.5 0 100 200m postwoschmidti 416.0 416.1 0 a Monograptus bouceki - elegans detortus transgrediens - perneri Silur-8 Monograptus branikensis - Pri-1 417.5 lochkovensis 418.02 Ozarkodina remscheidensis Pridoli Interval Zone Monograptus parultimus - ultimus 418.7 Lud-3 419.0 Ozarkodina crispa Monograptus formosus 419.75 Silur-7 Ozarkodina snajdri Interval Zone Neocucullograptus kozlowskii -

420 -Pridoli Polonograptus podoliensis Lud-2 420.5 420.7 Polygnathoides siluricus mixed-polarity interval 421.0 Saetograptus leintwardinensis 421.3 Lud-1 Ancoradella ploeckensis Ludlow Lobograptus scanicus 422.0 Silur-6 [ not zoned ] 422.9 stauros Neodiversograptus nilssoni Gor-1 423.0 Colonograptus ludensis Colonograptus praedeubeli - deubeli 424.0 Silur-5a Ozarkodina bohemica Pristiograptus parvus - 425 Hom-2 425.0 Gothograptus nassa 425.55 Ozarkodina sagitta sagitta Cyrtograptus lundgreni 426.2 Hom-1 426.0 Silur-5 Cyrtograptus rigidus - perneri Wenlock 426.68 polarity interval

Wenlock Normal- Wenlock Ozarkodina sagitta rhenana Monograptus riccartonensis - belophorus - antennularis Shein-1 427.5 Kockelella ranuliformis Cyrtograptus centrifugus - 428.2 428.18 murchisoni Tely-4 429.0 Cyrtograptus lapworthi - insectus Silur-4 amorphognathoides 429.75

430 Upper Oktavites spiralis Interval Zone Tely-3 430.5 Pterospathodus celloni Monograptus griestoniensis - 431.75 Pterospathodus eopennatus crenulata Monograptus crispus Silurian Tely-2 433.0 Spirograptus turriculatus Silur-3 434.0

435 Tely-1 435.0 staurognathoides Spirograptus guerichi

436.0 435.9 Stimulograptus sedgwickii Aer-2 436.8 Silur-2 Lituigraptus convolutus polarity interval Llandovery Llandovery mixed- Monograptus argenteus - 437.79 leptotheca Pterospathodus tenuis Demirastrites triangulatus- 439.0 Aer-1 439.0 pectinatus

440 Ordovician Coronograptus cyphus

Tippecanoe Silur-1 Sealevel Events (Baltoscandia) Distomodus kentuckyensis 441.12 Orthograptus vesiculosis Parakidograptus acuminatus Rhuddanian (Saelabonn) Transgressive Event Akidograptus ascensus Rexroadus nathani 443.7 Rhud-1 443.7 Lowstand Normalograptus? persculptus Event Ordovician: North Atlantic 444.6 Hirnantian Ashgill Langoyene Drowning Conodont Zones 445 Event Normalograptus? extraordinarius 445.6 Lowstand Terminal Husbergoya Hirn-1 445.7 Lowstand Event 445.88 Interval Kat-7 446.3 446.7 Husbergoya Drowning Paraorthograptus pacificus Event ordovicicus Kat-6 447.3 Spannslokket Drowning 447.65 Event Hirnantian-

Lt. N Kat-5 448.0 448.4 pre-pacificus Grimsoya Regressive Kat-4 449.0 Event 449.35 Linearis Drowning-3 Climacograptus? uncinatus 450 Kat-3 450.0 Event Katian Dicellograptus gravis 451.0

Linearis Drowning-2 Event Kat-2 452.0 Dicranograptus kirki Linearis Drowning-1 Amorphognathus superbus

Late Event Solvang Lowstand Event

Lower 453.75 Nakkholmen Drowning Diplacanthograptus spiniferus Event

Frognarkilen Lowstand 455 Diplacanthograptus lanceolatus Kat-1 Event 455.8 455.5 455.75 Late Sand-3 456.2 Llanvirn- Keila Drowning Event Caradoc Orthograptus calcaratus 457.2 Highstand Amorphognathus tvaerensis Arnestad Drowning Sand-2 458.2 Vollen Lowstand Sandbian-E. Katian mixed interval (Pavlov-Gallet, 2005)

459.69 Nemagraptus gracilis 460

460.9 Sand-1 460.9 Pygodus anserinus 461.35 Darr-4 461.8 462.2 Archiclimacograptus riddellensis Furudal Highstand Pygodus serra Darr-3 462.8 463.28 Skarlov Lowstand Helskjer Drowning Darr-2 464.0 Event Pseudoclimacograptus Eoplacognathus suecicus decoratus 465 Stein Lowstand Event 465.5 Basal Llanvirn Drowning Event Eoplacognathus variabilis Undulograptus intersitus Late Arenig - Darr-1 467.0 Middle Early Llanvirn Lowstand Undulograptus austrodentatus 468.1 norrlandicus Cardiograptus morsus 468.6 Oncograptus upsilon Paroistodus originalis Isograptus victoriae maximus Komstad Regressive

470 Ordovician Baltoniodus navis Event Isograptus victoriae victoriae Gardlosa Drowning 471.0 Event Dap-2 Baltoniodus triangulatus 471.48 Basal Whiterock Isograptus victoriae lunatus 471.8 Dap-1 471.8 Lowstand 472.34 Isograptus primulus Mayero Flo-5 473.0 Mid Arenig Oepikodus evae Didymograptus protobifidus Highstand

Reversed Superchron 474.0 Evae Drowning Event (Pendeograptus fruticosus) 475 Flo-4 475.0 Floian Upper 475.5 Billingen Transgressive Event Flo-3 476.0 elegans 476.45 Flo-2 477.0 Tetragraptus approximatus

478.2 478.6

Late Tremadoc- 480 E. Arenig

Early Lowstand Paroistodus proteus Flo-1 481.0 Copiosus Drowning Event Araneograptus pulchellus

482.26

Tremadocian Trem-3 483.8 Hagastrand Drowning Event Ceratopyge Regressive Event 485 485.15 Kiaerograptus Drowning Paltodus deltifer Aorograptus victoriae Event Early- Peltocare Regression Psigraptus jacksoni Event Middle Zones and Black Mountain Anisograptus Trem-2 486.8 Tremadocian Regression Event major events 487.55 Highstand Stonehenge angulatus Trilobite Zones and Cambrian events Transgression South China - 488.3 Trem-1 488.3 Hysterolenus - Onychopyge C. prolindstromi (Australia) 488.65 Acerocare Regressive Event Hirsutodontus simplex (Australia) Camb10-4 489.0 Leiostegium constrictum - Eopatokephalus nyaicus 489.4 Shenjiawania brevica Cordylodus proavus (Australia) Late 489.8 Mictosaukia striata -Fatocephalus Mictosaukia perplexa 490 Camb10-3 Stage 10 Cambrian Archaeuloma taoyuanense - Dolgeuloma abunda - D. Neoagn. quasibilobus - 490.5 Lowstand Leioagnostus cf. bexelli dolganensis Shergoldia nomas Ord-Camb boundary Camb10-2 491.2 Lotagnostus americanus - 491.56 Ketyna ketiensis - Monosulcatina laeve series (Pavlov-Gallet, 2005) Hedinaspis regalis Sinosaukia impages 492.0 Camb10-1 492.0 Probinacunaspis nasalis - Rhaptagn. clarki maximus - Rh. papilio Peichiashania hunanensis Rh. bifax - N. denticulatus Tukalandaspis egens 493.2 Eolotagnostus decoratus - Rh. clarki prolatus - Caz. secatrix Kaolishaniella Rh.c. patulus - C. squamosa - H. lilyensis Stage 9 Peichiashania tertia - P. quarta Rhaptagnostus ciliensis - Irvinella norilica Peich. secunda - Pro. glabella

Furongian Onchonotellus cf. kuruktagensis 495 Camb9-1 495.0 Norilagn. quadratus - Irvingella cipita Agnostotes orientalis - Irvingella Wentsuia iota - Rhaptagn. apsis 496.0 angustilimbata Irvingella tropica Agnostotes orientalis - Irvingella perfecta Corynexochus plumula - Stigmatoa diloma Erixanium sentum 497.0 Sinoproceratopyge cf. kiangshanensis Erixanium sentum Paibian Innitagnostus inexpectans - [ Blank zone ] Proceratopyge protracta Proceratopyge cryptica Glyptagnostus reticulatus Glyptagnostus reticulatus Glyptagnostus reticulatus 499.0 Paib-1 499.0 Glyptagnostus stolidotus Glyptagnostus stolidotus Glyptagnostus stolidotus Middle 500 500.0 Linguagnostis reconditus Achmarhachis quasivespa Pedinocephalina - Toxotis Acrocephalella granulosa - Guzhangian Guzh-2 501.0 Proagnostus bulbus Erediaspis eretes 501.35 Koldiniella prolixa Dam. torosa - Fer. janitrix Guzh-1 502.0 Lejopyge laevigata Lejopyge laevigata - Lejopyge laevigata Oidalagnostus trispinifer

503.0 Sauk 502.9 Lejopyge armata Goniagnostus nathorsti Anomocarioides limbataeformis Goniagnostus nathorsti 504.0 Drum-2 Doryagnostus deltoides Ptychagnostus punctuosus Drumian Ptychagnostus punctuosus Anopolenus henrici - 505 505.0 Euragnostus opimus Corynexochus perforatus Series 3 Ptychagnostus atavus Drum-1 506.0 506.5 Ptychagnostus atavus Tomagnostus fissus 506.5 Camb5-3 507.0 Ptychagnostus gibbus Ptychagnostus gibbus Ptychagnostus gibbus 507.18 Pentagnostus shergoldi Camb5-2 507.5 Pentagnostus praecurrens Stage 5 508.1 Oryctocephalus orientalis Pentagnostus anabarensis Kounamkites Camb5-1 509.0 Mid-Cambrian series (Pavlov-Gallet, 2005) Oryctocephalus indicus 510.0 510 510.13 Xystridura negrina Ovatoryctocara granulata - Ovatoryctocara granulata - holopygus Schistocephalus antiquus Camb4-2 511.5 Protoryctocephalus Anabaraspis splendens Redlichia forresti Stage 4 512.75 Lermontovia grandis

Arthricocephalites - Changaspis Bergeroniellus ketemensis Camb4-1 514.0 [ Gap ] Bergeroniellus ornata 515.0 514.67 Arthricocephalus 515 Bergeroniellus asiaticus Camb3-5 515.5 Pararaia janeae Bergeroniellus gurarii 516.25 Sichuanolenus - Chengkouia Series 2 Pararaia bunyerooensis B. micmacciformis -Erbiella Camb3-4 517.0 Pararaia tatei 517.32 Camb3-3 517.8 Judomia Stage 3 518.2

Cambrian Abadiella huoi Camb3-2 518.8 Pagetiellus anabarus Hupeidiscus - Sinodiscus 520 519.9 Fallotaspis

521.0 Profallotaspis jakutensis Camb3-1 521.0 SMALL SHELLY SMALL SHELLY FOSSIL ZONES: ARCHAEOCYATHAN ZONES: ZONES: Dok. lenaicus-Tum. primigenius 522.5 Sinosachites flabelliformis - Tannuolina zhangwentangi Dokidocyathus regularis Watsonella Camb2-2 524.0 [ Blank zone ] Stage 2 Nochoroicyathus sunnaginicus 525 525.4 Heraultipegma yunnanensis

[ Blank zone ] [ Blank zone ] Lower

528.0 Camb2-1 528.0 SMALL SHELLY FOSSIL ZONES:

Siphogonuchites triangularis - 530 530.0 Paragloborilus subglobosus Purella antiqua

Fort-6 533.0

533.9 Early-Cambrian series (Kirschvink and Rozanov, 1984; Kirschvink, 1978) and Rozanov, 535 Fortunian Fort-5 535.0 535.45 Anabarites trisulcatus - Fort-4 536.0 Protohertzium anabarica Anabarites trisulcatus

536.8

Fort-3 538.0

539.0

540 Fort-2 540.0

540.7

542.0 Fort-1 542.0

542.8

Vend-4 544.0

545 544.83 Vend-3 545.5

546.63

Vend-2 548.0 548.5 Vend-1 549.0

550