- CarieVinne
-
岗巴宗山剖面始于岗巴村东南约250 m处,向北北东方向测量至山顶,剖面长约2 km,岩层倾向东北,由西南向东北地层由老到新,出露的地层主要有下白垩统察且拉组,上白垩统冷青热组、岗巴村口组、宗山组及古近系的基堵拉组和宗浦组。其地层层序及古生物学、沉积学等特征如下:
古新统
宗浦组
下段
50.深灰色生物碎屑灰岩,风化面呈瘤状,构成向斜核部,富含腹足类、双壳类及有孔虫等化石。有孔虫主要有:Rotalia conoidalis,R.hensoni,R.oriental-is,R.pinariensis,R.lenticularis,R.sp.,Lockhartia cushmani,L.haimei,Smoutina corpuscula,S.cruysi 等;介形虫有:Bairdia acrocaudalis,Cytherel-loidea seostata 等 47 m
49.深灰色厚层—块状灰岩,富含有孔虫、腹足类及海胆等化石。有孔虫主要有:Rotalia dukhani,R.conoidalis,R.hensoni,R.pinarensis,R.lenticularis,Lockhartia cushmani,L.haimei,L.hunti,Smoutina corpuscula 等;腹足类有:Velates sp.;海胆有:Echinolampas nuclus Martheron 等 31 m
48.灰黑色中层灰岩夹薄层泥灰岩,产有孔虫、腹足类及双壳类化石。有孔虫主要有:Rotalia hensoni,R.pinarensis,R.trochidiformis,R.crassata,Lockhartia cushmani,Smoutina cruysi 等;腹足类有:Campanile brevius,Velates tibetica,Rhinoclavis pissarroi 等 16 m
47.深灰色块状灰岩,富含有孔虫、介形虫、海胆及腹足类等化石。有孔虫主要有:Rotalia dukhani,R.conoidalis,R.hensoni,R.orientalis,R.pinarensis,R.lenticularis,R.sp.,Lockhartia cushmani,L.haimei,L.hunti,Smoutina corpuscula,S.cruysi 等;介形虫有 Bairdia sp.;腹足类有:Campanile ganesha,Heligmotenta sp.,Diconomorpha elegans,Euspirocrommium cossmanni 等 22 m
-整 合
基堵拉组
46.黄褐色铁质细粒石英砂岩及含砾长石中粒石英砂岩,未见化石 6.1 m
45.灰白色中—粗粒石英砂岩,未见化石 32.9 m
44.灰白色中—细粒石英砂岩,呈厚层块状,中部夹有灰色砂质灰岩。砂质灰岩中产有介形虫、有孔虫及双壳类碎片。有孔虫有:Rotalia dukhani,R.hen-soni,R.sp.,Miliolidae gen.et sp.Indet.,Verneuilina sp.等;介形虫有:Bairdia fabaeformis,B.plana,B.ventrirotunda,B.sp.,Uroleberis inflata,U.imparilis,Cytherella firma,Propontocypris arrossa,Brachycythere xizangensis,Xestoleberis kangpaensis 等 132.5 m
43.灰白色中—细粒钙质砂岩,含双壳类、有孔虫及介形虫化石。有孔虫有:Rotalia dukhani,R.hensoni,R.sp.,Smoutina cruysi,S.grandis,S.sp.;双壳类有:Pholadomya clathrata,Mytilus arrialoorensis,Laevitrigonia(Eselaevitrigo-nia)cf.meridiana,Plaginostoma sp.,Cardium sp.,Granocardium(Ethmocardi-um)cf.whiteri,Xenocardita sp.等 6.4 m
-假 整 合
上白垩统
宗山组
上段
42.灰色中厚层生物碎屑灰岩 23.74 m
41.灰色薄层含生物碎屑微晶灰岩,含有孔虫、双壳类及珊瑚等化石。有孔虫有:Omphalocyclus macroporus 16.59 m
40.灰色砂质灰岩,局部见膏盐,呈条带状分布,风化面为褐黄色,含生物碎屑,产有孔虫及双壳类。有孔虫:Omphalocyclus macroporus;双壳类:Pinna sp.11.85 m
39.灰色中厚层生物碎屑微晶灰岩,含有孔虫、双壳类、珊瑚、腹足类等化石。有孔虫:Orbitoides media,O.apiculata,Omphalocyclus macroporus 14.37 m
38.深灰色有孔虫固着蛤灰岩,产有孔虫、双壳类、海胆、珊瑚等化石。有孔虫:Orbitoides media,O.apiculata 8.40 m
37.灰色中层状生物碎屑微晶灰岩。产有孔虫、海胆、珊瑚等化石。有孔虫:Omphalocyclus macroporus 5.90 m
36.灰色中厚层有孔虫灰岩,产有孔虫、双壳类、海胆、珊瑚、腹足类等化石。有孔虫:Orbitoides media,O.apiculata 11.15 m
35.黄灰色薄层钙质细砂岩。产有孔虫:Orbitoides apiculata 14.43 m
34.浅灰色生物碎屑灰岩。产有孔虫:Orbitoides media,Omphalocyclus macroporus;双壳类:Vepricardium sp.6.47 m
33.灰黑色中薄层有孔虫灰岩。产有孔虫:Orbitoides media,Omphalocyclus macrop-orus 10.07 m
下段
32.深灰色生物碎屑灰岩。产有孔虫:Orbitoides tissoti,Goupillaudina lecoitrei;双壳类:Bournonia haydeni,B.cf.haydeni,B.tibetica,Inoceramus(Catacera-mus)grandiformis,I.(C.)perlonga,Amphidonte ostracina 等 13.03 m
31.灰色薄层灰岩与薄层泥灰岩。产有孔虫:Globotruncanita stuartiformis,Heterohe-lix cordatus,Orbitoides tissoti,Spiroplectammina caribbeana,S.praelaevis,Bolivina basbeckensis,B.ornate,Gaudryina helvetica;双壳类:Protocardia hillanum,P.regularis,P.subtrigona,Neithea(N.)aequicostata,N.(N.)amanoi,Cer-atostreon spinosum,Aetostreon zongshanensis,Ostrea(O.)sp.88.18 m
30.灰色中层微晶灰岩,偶夹薄层或叶片状泥灰岩或钙质页岩,含菊石、海胆等化石 13.85 m
29.灰色中层至中厚层微晶灰岩。产有孔虫:Globotruncanita stuartiformis,Globotruncana linneiana,Heterohelix globulosa 22.88 m
28.灰色中层微晶灰岩夹黄绿色页岩。产有孔虫:Globotruncanita elevata,G.car-inata,Globotruncana linneiana,Dorothia stephensoni,D.conicula,D.oxycona,D.ovata,Ammobaculites indicus,A.phlegeri 10.54 m
27.深灰色中厚层微晶灰岩,偶夹泥岩。产有孔虫 Globotruncanita elevata,G.car-inata,G.sp.,Globotruncana ventricosa,G.bulloides,G.linneiana,G.sp.,Rosita fornicata,Heterohelix globulosa,H.cordatus,H.navarroensis,Laevihetero-helix sp.,Globorotalites micheliniana,Dorothia oxycona,D.sp.,Lenticulina sp.,Oolina sp.,Ammobaculites indicus,A.phlegeri 等 12.80 m
26.灰色薄层泥灰岩。产有孔虫、菊石等化石。有孔虫有:Globotruncanita stuarti-formis,G.stuarti,G.carinata,G.elevata,G.sp.,Globotruncana bulloides,G.sp.,Rosita fornicata,Praeglobotruncana anomala,Heterohelix globulosa,H.cordatus;菊石有:Pachydiscus gangbaensis,P.bassae,Menabites pauciturculatus,M.(Australiella)zongshanensis,M.(Australiella)minor,M.(Delawarella)jeanneti,M.(Delawarella)subdelawarnsis,Submortoniceras xizangense,Baculites sparsinodosus,Baculites sp.,Pseudoschloenbachia angusta 15.57 m
-整 合
岗巴村口组
上段
25.灰色薄层泥灰岩。产有孔虫:Hedbergella planispira,H.delrioensis,H.flan-drini,H.sp.,Whiteinella sp.,Heterohelix cordatus,H.carinata,H.reussi,H.globulosa,Dicarinella canaliculata,D.primitiva,D.asymetrica,D.sp.,Marginotruncana schneegansi,M.pseudolinneiana,M.coronata,M.sinuosa,Pseudoguembelina elegans,P.hariaensis,Dorothia sp.,Lenticulina sp.等 2.41 m
24.灰色薄层微晶灰岩夹黄绿色泥灰岩。产有孔虫:Dicarinella imbricata,D.concavata,Marginotruncana pseudolinneiana,M.coronata,M.sinuosa,M.sp.,Globotruncanita carinata,G.globigerinoides,G.carinata,Whiteinella baltica,W.archaeocretacea,W.sp.,Hedbergella delrioensis,H.holmdelensis,H.sp.,Het-erohelix globulosa,H.cordatus,H.reussi,Dorothia sp.,Lenticulina sp.等 12.70 m
23.灰色薄层微晶灰岩与黄绿色页岩互层。产有孔虫、双壳类化石。有孔虫:Marginotruncana renzi,M.coronata,M.schneegansi,M.pseudolinneiana,M.sinuosa,M.sp.,Dicarinella imbricata,D.primitiva,D.concavata,Whiteinella baltica,W.archaeocretacea,W.sp.,Hedbergella orectus,H.delrioensis,H.planispira,H.flandrini,H.holmdelensis,H.sp.,Heterohelix globulosa,H.cordatus,H.reussi,H.sp.,Dorothia sp.,Lenticulina sp.,Dentalinoides sp.等;双壳类:Ostrea(O.)cf.cymbula,Clavipholas triangularis 等 12.70 m
22.灰色薄层微晶灰岩夹黄绿色泥灰岩。产有孔虫、双壳类化石。有孔虫:Marginotruncana paraconcavata,M.sigali,M.coronata,M.schneegansi,M.pseudolinneiana,M.sinuosa,M.sp.,Dicarinella imbricata,D.primitiva,D.concavata,Whiteinella archaeocretacea,Hedbergella orectus,H.delrioensis,H.planispira,H.flandrini,H.holzli,H.sp.,Heterohelix globulosa,H.cordatus,H.reussi,H.pulchra,Dorothia sp.,Lenticulina smileyi,L.sp.,Dentalinoides sp.等 27.92 m
21.灰色薄层微晶灰岩夹黄绿色页岩。产有孔虫、双壳类化石。有孔虫:Marginotruncana schneegansi,M.coronata,M.tarfayaensis,M.sinuosa,M.pseudolinneiana,M.sp.,Dicarinella imbricata,D.canaliculata,Whiteinella balti-ca,Hedbergella delrioensis,H.planispira,H.flandrini,H.holzli,H.sp.,Heterohelix globulosa,H.cordatus,H.reussi,H.pulchra,H.sp.,Dorothia sp.,Lenticulina smileyi,L.sp.,Notoplanulina sp.等 27.10 m
20.灰色厚层微晶灰岩与黄绿色泥页岩互层。产有孔虫:Marginotruncana schnee-gansi,M.coronata,M.tarfayaensis,M.sinuosa,M.pseudolinneiana,M.sp.,Dicarinella imbricata,D.canaliculata,Whiteinella baltica,W.paradubia,W.brittonensis,W.archaeocretacea,W.inornata,Helvetoglobotruncana sp.,Hedbergella delrioensis,H.planispira,H.flandrini,H.holzli,H.orectus,H.crass,H.sp.,Heterohelix globulosa,H.cordatus,H.reussi,H.pulchra,H.moremani,H.sp.,Dorothia sp.,Lenticulina sp.,Notoplanulina sp.,Ophthalmid-ium sp.,Dentalinoides sp.,Oolina sp.,Valvulineria parva 等 28.12 m
下段
19.黄绿色泥页岩。产有孔虫:Marginotruncana schneegansi,M.renzi,Helve-toglobotruncana praehelvetica,H.sp.,Whiteinella baltica,Praeglobotruncana gibba,Hedbergella crass,H.orectos,H.delrioensis,H.sp.,Heterohelix globulosa,H.reussi,H.cordatus,H.sp.,Notoplanulina sp.等 13.65 m
18.灰色薄层微晶灰岩。产有孔虫:Helvetoglobotruncana praehelvetica,Hedbergella orectus,Heterohelix reussi,Valvulineria parva 等 2.56 m
17.下部为薄层泥灰岩与黄绿色页岩互层;上部为黄绿色页岩含泥灰岩透镜体。含有孔虫、双壳类化石。有孔虫:Praeglobotruncana helvetica,Hedbergella crass,H.delrioensis,Whiteinella baltica,W.aprica,W.brittonensis,W.archaeocre-tacea,Helvetoglobotruncana praehelvetica,H.helvetica,Heterohelix globulosa,H.sp.,Dicarinella hagni,Marginotruncana schneegansi,M.renzi 等 11.09 m
16.黄绿色页岩夹灰绿色泥灰岩薄层。产有孔虫:Hedbergella portsdownensis,H.murphi,H.crass,H.delrioensis,H.simplex,Whiteinella baltica,W.archaeoc-retacea,Helvetoglobotruncana praehelvetica,H.helvetica,Heterohelix globulosa,Marginotruncana schneegansi,M.renzi,Lenticulina franki,L.warregoensis 等 13.65 m
15.浅灰色薄层灰岩。产有孔虫:Hedbergella crass,H.delrioensis,Whiteinella baltica,W.aprica,W.archaeocretacea,Helvetoglobotruncana praehelvetica,H.helvetica,Heterohelix globulosa,Dicarinella hagni,Marginotruncana schneegansi,Haplophragmoides sp.等 2.56 m
14.灰绿色、黄绿色页岩与灰色薄层泥灰岩互层。产有孔虫及双壳类。有孔虫:Hedbergella portsdownensis,H.murphi,Whiteinella baltica,W.aprica,W.britto-nensis,W.archaeocretacea,Dicarinella hagni,D.elata,Spiroloculina sp.,Bi-planata peneropliformis;双壳类:Camptonectes virgatus,Pycnodonte(Phygraea)cf.vesiculosa,P.(P.)cf.pseudovesicularis 12.80 m
13.黄绿色页岩,含灰色泥灰岩结核。产有孔虫及双壳类。有孔虫:Hedbergella portsdownensis,H.delrioensis,H.murphi,Whiteinella baltica,W.archaeocre-tacea,Helvetoglobotruncana praehelvetica,H.helvetica,Heterohelix globulosa,H.sp.,Dicarinella hagni,D.algerina,Marginotruncana schneegansi,Lenticulina fran-ki,L.warregoensis,Spiroloculina sp.,Miliammina sp.,Biplanata peneropliformis;双壳类:Bakevellia subpseudorostrata,Phelopteria boeckhi,Inoceramus(Catacera-mus)sp.,I.(Endocostea)haydeni,Inoceramus(s.l.)cf.crippsi,I.(s.l.)flatus,I.(s.l.)sp.,Inoceramya(?)Xizangensis 42.5 m
-整 合
冷青热组
12.灰黑色页岩。产有孔虫、双壳类及介形虫化石。有孔虫有:Rotalipora appen-ninica,R.deekei,R.greenhornensis,R.cushmani,R.reicheli,R.montasl-vensis,Praeglobotruncana stephani,P.turbinate,P.gibba,P.aumalensis,Hed-bergella planispira,H.portsdownensis,H.simplex,H.delrioensis,Whiteinella baltica,W.aprica,W.brittonensis,W.archaeocretacea,Helvetoglobotruncana praehelvetica,Heterohelix globulosa,H.pulchra,H.reussi,H.sp.,Dicarinella algerina,D.elata,D.hagni,Clavihedbergella simplex,Globogerinelloides eaglefor-densis,G.bentonensis,Dorothia sphaeroidalis,D.conicula,D.gangbaensis,Lenticulina franki,L.warregoensis,L.sp.,Ammodiscus cretaceus,Gyroidina excre-ta,Gavelinella sp.,Textularia anacooraensis,T.sp.,Anomalina solis,Gyroidi-noides primitive,Gavelinolla intermedia,Dentalinoides sp.,Dentalina sp.,Tristix sp.,Lagena apiculata,L.sp.,Discorbis sp.,Nodosaria sp.,Lingulogavelinella sp.,Bigenerina sp.,Ammoglobigerina sp.,Gravellina sp.,Astacolus howchini,Ne-oflabellina leptodisca,Ammobaculites sp.,Quinqueloculina sp.,Eggerellia sp.92.39 m
11.黄绿色泥页岩夹瘤状灰岩,产有孔虫、菊石等化石。有孔虫有:Rotalipora appenninica,R.evoluta,R.greenhornensis,R.cushmani,R.reicheli,Prae-globotruncana stephani,P.turbinate,Dorothia sphaeroidalis,D.conicula,Lentic-ulina franki,Gyroidina excreta,G.tendami,Gyroidinoides primitive;菊石有:A-canthoceras sp.,Calycoceras newboldi 13.28 m
10.黑色页岩。产有孔虫:Rotalipora appenninica,R.evoluta,Hedbergella planispi-ra,Dorothia sphaeroidalis,Lenticulina franki,Gyroidinoides infracretacea,Anomalina solis 96.86 m
9.深灰色薄层角砾状灰岩 1.2 m
8.深灰色粉砂岩夹薄层微晶灰岩。有孔虫:Rotalipora appenninica 10.82 m
-整 合
下白垩统
察且拉组
7.黄绿、灰黑色粉砂质泥岩夹薄层钙质粉砂岩。产有孔虫:Globigerinelloides ea-glefordensis 20.50 m
6.黄绿色薄层粉砂岩夹钙质砂岩薄层或透镜体。产有孔虫:Globigerinelloides ea-glefordensis 23.32 m
5.黄绿色薄层钙质砂岩夹砂质灰岩 16.72 m
4.黄绿色薄层粉砂岩夹钙质砂岩 20.26 m
3.黄绿色页岩、泥质粉砂岩夹粉砂质泥岩薄层 34.27 m
2.黄绿色页岩夹钙质砂岩 10.03 m
1.灰黑色粉砂质泥岩夹粉砂岩薄层,偶夹泥灰岩薄层或透镜体>31.76 m