Orbitally induced limestone/marlstone rhythms in the albian-cenomanian cismon section (Venetian region, northern Italy): Sedimentology, calcareous and siliceous plankton distribution, elemental and isotope geochemistry

Palaeogeography, Palaeoclimatology, Palaeoecology

Volumn 126, Issue 3-4, 1996, Pages 227-260

  Bellanca, A ^a   Claps, M ^b   Erba, E ^c   Masetti, D ^b   Neri, R ^a   Premoli Silva, I ^c   Venezia, F ^a  

^a UNIVERSITY OF PALERMO   (Italy)

^b UNIVERSITY OF FERRARA   (Italy)

^c UNIVERSITY OF MILAN   (Italy)

Author keywords

C(org) rich deposits; calcareous plankton; Cretaceous; cycle stratigraphy; geochemical tracers; Southern Alps

Indexed keywords

CRETACEOUS; CYCLIC SEDIMENT; CYCLIC SEDIMENTATION; MILANKOVITCH CYCLE; SEQUENCE STRATIGRAPHY;

ITALY, VENETO;

EID: 0030436105     PISSN: 00310182     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0031-0182(96)00041-7     Document Type: Article

References (106)

1. Arthur, M.A., Jenkyns, H.C., Brumsack, H.J. and Schlanger, S.O., 1990. Stratigraphy, geochemistry and palaegeography of organic carbon-rich Cretaceous sequences. In: R.N. Ginsburg and B. Beaudoin (Editors), Cretaceous Resources, Events and Rhythms. Kluwer, Dordrecht, pp. 75-119.
2. Arthur, M.A., Schlanger, S.O. and Jenkyns, H.C., 1987. The Cenomanian-Turonian anoxic event, II Paleoceanographic controls on organic matter production and preservation. In: J. Brooks and A. Fleet (Editors), Marine Petroleum Source Rocks. Geol. Soc. Spec. Publ., 26: 401-420.
3. Balzer, W., 1982. On the distribution of iron and manganese at the sediment/water interface: thermodynamic versus kinetic control. Geochim. Cosmochim. Acta, 46: 1153-1161.
4. Barron, E.J., Arthur, A.M. and Kauffman, E.G., 1985. Cretaceous rhythmic bedding sequences: a plausible link between orbital variations and climate. Earth Planet. Sci. Lett., 72: 327-340.
5. Berger, A., 1984. Accuracy and frequency stability of the earth's orbital elements during the Quaternary. In: A.L. Berger et al. (Editors), Milankovitch and Climate, Part 1. Reidel, Dordrecht, pp. 3-39.
6. Berger, A. and Loutre, M.F., 1994. Astronomical forcing through geological time. In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 15-24.
7. Bernoulli, D. and Jenkyns, H., 1974. Alpine, Mediterranean and Central Atlantic Mesozoic facies in relation to the early evolution of the Tethys. In: R.H. Dott and R.H. Shaver (Editors), Modern and Ancient Geosynclinal Sedimentation. SEPM Spec. Publ., 19: 129-160.
8. Bersezio, R., 1993. Sedimentary events and rhythms in an Early Cretaceous pelagic environment: the Maiolica Fm of the Lombardy Basin (Southern Alps). G. Geol., 55(1): 5-20.
9. Bosellini, A., Masetti, D. and Sarti, M., 1981. A Jurassic "Tongue of the Ocean" infilled with oolitic sands: the Belluno Trough, Venetian Alps, Italy. Mar. Geol., 44: 55-95.
10. Bottjer, D.J., Arthur, M.A., Dean, W.E., Hattin, D.E. and Savdra, C.E., 1986. Rhythmic bedding produced in Cretaceous pelagic carbonate environments: sensitive recorders of climatic cycles. Paleoceanography, 1: 467-481.
11. Brasier, M.D., Anderson, M.M. and Corfield, R.M., 1992. Oxygen and carbon isotope stratigraphy of early Cambrian carbonates in southeastern Newfoundland and England. Geol. Mag., 129: 265-279.
12. Breit, G.N. and Wanty, R.B., 1991. Vanadium accumulation in carbonaceous rocks: A review of geochemical controls during deposition and diagenesis. Chem. Geol., 91: 83-97.
13. Broecker, W.S. and Peng, T.H., 1982. Tracers in the Sea. Lamont-Doherty Geol. Observ., New York, 690 pp.
14. Brumsack, H.J., 1980. Geochemistry of Cretaceous black shales from the Atlantic Ocean (DSDP Legs 11, 14, 36 and 41). Chem. Geol., 4: 1-25.
15. Calvert, S.E. and Price, N.B., 1972. Diffusion and reaction profiles of dissoved manganese in the pore waters of marine sediments. Earth Planet. Sci. Lett., 16: 245-259.
16. Caron, M., 1983. La spéciation chez les Foraminifères planctique: une réponse adaptée aux contraintes de l'environnement. Zitteliana, 10: 671-676.
17. Caron, M., 1985. Cretaceous planktic foraminifera. In: H.M. Bolli et al. (Editors), Plankton Stratigraphy. Cambridge Univ. Press, pp. 17-86.
18. Channell, J.E.T., Lowrie, W. and Medizza, F., 1979. Middle and Early Cretaceous magnetic stratigraphy from the Cismon section, Northern Italy. Earth Planet. Sci. Lett., 42: 153-166.
19. Chatfield, C., 1989. The Analysis of Time Series: An Introduction. Chapman and Hall, London, 240 pp.
20. Claps, M. and Masetti, D., 1994. Milankovitch periodicities recorded in Cretaceous deep-sea sequences from the Southern Alps (Northern Italy). In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 99-107.
21. Cook, H.E. and Egbert, R.M., 1983. Diagenesis of deep-sea carbonates. In: G. Larsen and G.V. Chilingar (Editors), Diagenesis in Sediments and Sedimentary Rocks. 2 (Devel. Sedimentol., 25B). Elsevier, Amsterdam, pp. 213-288.
22. Curry, W.B., Ostermann, D.R., Guptha, M.V.S. and Ittekott, V., 1992. Foraminiferal production and monsoonal upwelling in the Arabian Sea: evidence from sediment traps. In: C.P. Summerhayes et al. (Editors), Upwelling Systems: Evolution Since the Early Miocene. Geol. Soc. Spec. Publ., 64: 93-106.
23. De Boer, P.L., 1982. Cyclicity and storage of organic matter in Middle Cretaceous pelagic sediment. In: G. Einsele and A. Seilacher (Editors), Cyclic and Event Stratification. Springer, Berlin, pp. 456-475.
24. De Boer, P.L. and Smith, D.G., 1994. Orbital forcing and cyclic sequences. In: P.L. de Boer and D.G. Smith (Editors). Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 1-14.
25. De Boer, P.L. and Wonders, A.A.H., 1984. Astronomically induced rhythmic bedding in Cretaceous pelagic sediments near Moria (Italy). In: A.L. Berger et al. (Editors). Milankovitch and Climate, Part 1. Reidel, Dordrecht, pp. 163-175.
26. Diggle, P.J., 1990. Time Series. A Biostatistical Introduction. Oxford Univ. Press, London, 257 pp.
27. Dymond, J., Suess, E. and Lyle, M., 1992. Barium in deep-sea sediment: a geochemical proxy for paleoproductivity. Paleoceanography, 7: 163-181.
28. Erba, E., 1986. I Nannofossili calcarei nell'Aptiano-Albiano (Cretacico inferiore): biostratigrafia, paleoceanografia e diagenesi degli Scisti a Fucoidi del pozzo Piobbico (Marche). Thesis, Milano Univ.
29. Erba, E., 1992a. Middle Cretaceous calcareous nannofossils from the western tropical Pacific (ODP Leg 129): evidence for paleoequatorial crossings. In: R.L. Larson, Y. Lancelot et al., Proc. ODP Sci. Results, 129: 189-201.
30. Erba, E., 1992b. Calcareous nannofossil distribution in pelagic rhythmic sediments (Aptian-Albian Piobbico core, Central Italy). Riv. Ital. Paleontol. Stratigr., 97: 455-484.
31. Erba, E. and Premoli Silva, I., 1994. Orbitally driven cycles in trace fossils distribution from the Piobbico core (late Albian, central Italy). In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 211-225.
32. Falkner, K.K., Klinkhammer, G.P., Bowers, T.S., Todd, J.F. and Lewis, B.L., 1993. The behavior of barium in anoxic marine waters. Geochim. Cosmochim. Acta, 57: 537-554.
33. Fischer, A.G., 1986. Climatic rhythms recorded in strata. Annu. Rev. Earth Planet. Sci., 14: 351-376.
34. Fischer, A.G., De Boer, P.L. and Premoli Silva, I., 1990. Cyclostratigraphy. In: R.N. Ginsburg and B. Beaudoin (Editors), Cretaceous Resources, Events and Rhythms - Background and Plans for Research. Kluwer, Dordrecht, pp. 139-172.
35. Fischer, A. and Schwarzacher, W., 1984. Cretaceous bedding rhythms under orbital control? In: A.L. Berger et al. (Editors), Milankovitch and Climate. Reidel, Dordrecht, pp. 163-175.
36. Force, E.R. and Cannon, W.F., 1988. Depositional model for shallow-marine manganese deposits around black shale basins. Econ. Geol., 83: 93-117.
37. Franzini, M., Leoni, L. and Saitta, M., 1975. Revisione di una metodologia analitica per fluorescenza X basata sulla correzione completa degli effetti di matrice. Rend. Soc. Ital. Miner. Petrol., 21: 99-108.
38. Glikson, M., Chappell, B.W., Freeman, R.S. and Webber, E., 1985. Trace elements in oil shales, their source and organic association with particular reference to Australian deposits. Chem. Geol., 53: 155-174.
39. Gradstein, F.M., Agterberg, F.P., Ogg, J.G., Hardenbol, J., Van Veen, P., Thierry, J. and Huang, Z., 1994. A Mesozoic Time Scale. J. Geophys. Res., 99/B12: 24,051-24,074.
40. Hallock, P., Premoli Silva, I. and Boersma, A., 1991. Similarities between planktonic and larger foraminiferal evolutionary trends through Paleogene paleoceanographic changes. Palaeogeogr. Palaeoclimatol. Palaeoecol., 83: 49-64.
41. Harland, W.B., Armstrong, R.L., Cox, A.V., Craig, L.E., Smith, A.G. and Smith, D.G., 1990. A Geologic Time Scale 1989. Cambridge Univ. Press, New York, 265 pp.
42. Hatch, J.R. and Leventhal, J.S., 1992. Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian (Missourian) Stark Shale Member of the Dennis Limestone, Wabaunsee County, Kansas, U.S.A. Chem. Geol., 99: 65-82.
43. Herbert, T.D., Premoli Silva, I., Erba, E. and Fischer, A.G., 1995. Orbital chronology of Cretaceous-Paleocene marine sediments. In: W.A. Berggren et al. (Editors), Geochronology Time Scales and Global Stratigraphic Correlation. SEPM Spec Publ., 54: 81-93.
44. Hinnov, L.A. and Goldhammer, R.K., 1991. Spectral analysis of the Middle Triassic Latemar Limestone. J. Sediment. Petrol., 61: 1173-1193.
45. 34S in the world ocean. J. Geol., 99: 355-370.
46. Huerta-Diaz, M.A. and Morse, J.W., 1992. Pyritization of trace metals in anoxic marine sediments. Geochim. Cosmochim. Acta, 56: 2681-2702.
47. Jenkyns, H.C. and Clayton, C.J., 1986. Black shales and carbon isotopes in pelagic sediments from the Tethyan Lower Jurassic. Sedimentology, 33: 87-106.
48. Jenkyns, H.C., Gale, A.S. and Corfield, R.M., 1994. Carbon-and oxygen-isotope stratigraphy of the English Chalk and Italian Scaglia and its paleoclimatic significance. Geol. Mag., 131: 1-34.
49. Krauskopf, K.B., 1979. Introduction to Geochemistry. McGraw-Hill Kogakusha, Tokyo, 617 pp.
50. Leckie, R.M., 1987. Paleoecology of mid-Cretaceous planktonic foraminifera: A comparison of open ocean and epicontinental sea assemblages. Micropaleontology, 33: 164-176.
51. Leckie, R.M., 1989. A paleoceanographic model for the early evolutionary history of planktonic foraminifera. Palaeogeogr. Palaeoclimatol. Palaeoecol., 73: 107-138.
52. Leventhal, J.S. and Hosterman, J.W., 1982. Chemical and mineralogical analysis of Devonian black-shale samples from Martin County, Kentucky; Carroll and Washington counties, Ohio; Wise County, Virginia; and Overton County, Tennessee, U.S.A. Chem. Geol., 37: 239-264.
53. Lewan, M.D., 1984. Factors controlling the proportionality of vanadium to nickel in crude oils. Geochim. Cosmochim. Acta, 48: 2231-2238.
54. Lewan, M.D. and Maynard, J.B., 1982. Factors controlling enrichment of vanadium and nickel in the bitumen of organic sedimentary rocks. Geochim. Cosmochim. Acta, 46: 2547-2560.
55. Machhour, L., Philip, J. and Oudin, J.L., 1994. Formation of laminite deposits in anaerobic-dysaerobic marine environments. Mar. Geol., 117: 287-302.
56. Manivit, H., Perch-Nielsen, K., Prins, B. and Verbeek, J.W., 1977. Mid Cretaceous calcareous nannofossil biostratigraphy. K. Ned. Akad. Wet. Proc. Ser. B, 80: 169-181.
57. Marcucci Passerini, M., Bettini, P., Dainelli, J. and Sirugo, A., 1991. The "Bonarelli Horizon" in the central Apennines (Italy): radiolarian biostratigraphy. Cretaceous Res., 12: 321-331.
58. Marshall, J.D., 1992. Climatic and oceanographic isotopic signals from the carbonate rock record and their preservation. Geol. Mag., 129: 143-160.
59. McKenzie, J.A., 1985. Carbon isotopes and productivity in the lacustrine and marine environment. In: W. Stumm (Editor), Chemical Processes in Lakes. Wiley, New York, pp. 99-118.
60. Milankovitch, M., 1941. Kanon der Erdbestrahlung und seine Anwendungen auf das Eiszeitenproblem. Spec. Acad. R. Serbe, Belgrade (English translation U.S. Dep. Comm.), 133, 633 pp.
61. Mutterlose, J., 1991. Das Verteilungs-und Migrations-Muster des kalkigen Nannoplanktons in der Unterkreide (Valangin-Apt) NW-Deutschland. Palaeontographica B, 221: 27-152.
62. Odermatt, J.R. and Curiale, J.A., 1991. Organically bound metals and biomarkers in the Monterey Formation of the Santa Maria Basin, California. Chem. Geol., 91: 99-113.
63. Piepgras, D.J. and Jacobsen, S.B., 1992. The behaviour of rare earth elements in seawater: Precise determination of variations in the North Pacific water column. Geochim. Cosmochim. Acta, 56: 1851-1862.
64. Prange, A. and Kremling, K., 1985. Distribution of dissolved molybdenum, uranium and vanadium in Baltic Sea waters. Mar. Chem., 16: 259-274.
65. Pratt, L.M., Force, E.R. and Pomerol, B., 1991. Coupled manganese and carbon-isotopic events in marine carbonates at the Cenomanian-Turonian boundary. J. Sediment. Petrol., 61: 370-383.
66. Premoli Silva, I. and Sliter, V.W., 1994. Cretaceous planktonic foraminiferal biostratigraphy and evolutionary trends from the Bottaccione section, Gubbio, Italy. Palaeontogr. Ital., 82: 1-89.
67. Premoli Silva, I., Erba, E. and Tornaghi, M.E., 1989a. Paleoenvironmental signals and changes in surface fertility in Mid Cretaceous Corg-rich pelagic facies of the Fucoid Marls (Central Italy). Geobios Spec. Mem., 11: 225-236.
68. Premoli Silva, I., Ripepe, M. and Tornaghi, M.E., 1989b. Planktonic foraminiferal distribution record productivity cycles: evidence from the Aptian-Albian Piobbico core (Central Italy). Terra Nova, 1: 443-448.
69. Reijmer, J.J.G., Sprenger, A., Ten Kate, W.G.H.Z., Schlager, W. and Krystyn, L., 1994. Periodicities in the composition of Late Triassic calciturbitides (Eastern Alps, Austria). In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 323-343.
70. ROCC Group (Research on Cretaceous Cycles Group), 1986. Rhythmic bedding in Upper Cretaceous pelagic carbonate sequences: varying sedimentary response to climatic forcing. Geology, 14: 153-156.
71. Ricken, W., 1991. Variation of sedimentation rates in rhythmically bedded sediments. Distinction between depositional types. In: G. Einsele et al. (Editors), Cycles and Events in Stratigraphy. Springer, Berlin, pp. 167-187.
72. Ricken, W., 1994. Complex rhythmic sedimentation related to third order sea-level variations: Upper Cretaceous, Western Interior Basin, USA. In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 167-193.
73. Roth, P.H., 1978. Cretaceous Nannoplankton Biostratigraphy and Oceanography of the Northwestern Atlantic Ocean. In: W.E. Benson, R.E. Sheridan et al., Init. Rep. DSDP, 44: 731-759.
74. Roth, P.H., 1981. Mid-Cretaceous calcareous nannoplankton from the central Pacific: implication for paleoceanography. In: J. Thiede, T.L. Valuer et al., Init. Rep. DSDP, 62: 471-489.
75. Roth, P.H., 1989. Ocean circulation and calcareous nannoplankton evolution during the Jurassic and Cretaceous. Palaeogeogr. Palaeoclimatol. Palaeoecol., 74: 111-126.
76. Roth, P.H. and Bowdler, J.L., 1981. Middle Cretaceous calcareous nannoplankton biogeography and oceanography of the Atlantic ocean. In: J.E. Warme et al. (Editors), The Deep Sea Drilling Project: A Decade of Progress. SEPM Spec. Publ., 32: 517-546.
77. Roth, P.H. and Krumbach, K.R., 1986. Middle Cretaceous calcareous nannofossil biogeography and preservation in the Atlantic and Indian oceans: implications for paleoceanography. Mar. Micropaleontol., 10: 235-266.
78. Sass, E. and Kolodny, Y., 1972. Stable isotopes, chemistry and petrology of carbonate concretions (Mishash Formation, Israel). Chem. Geol., 10: 261-286.
79. 18O depletion in marine anaerobic pore water. Geology, 19: 839-842.
80. Savrda, C.E. and Bottjer, D.J., 1994. Ichnofossils and ichnofabrics in rhythmically bedded pelagic/hemi-pelagic carbonates: recognition and evaluation of benthic redox and scour cycles. In: P.L. de Boer and D.G. Smith (Editors), Orbital Forcing and Cyclic Sequences. IAS Spec. Publ., 19: 195-210.
81. Schlanger, S.O. and Jenkyns, H.C., 1976. Cretaceous oceanic anoxic events: causes and consequences. Geol. Mijnbouw, 55: 179-184.
82. Schmitz, B., 1987. Barium, equatorial high productivity, and the northward wandering of the Indian Continent. Paleoceanography, 2: 63-77.
83. Scholle, P. and Arthur, M.A., 1980. Carbon isotopic fluctuations in pelagic limestones: potential stratigraphic and petroleum exploration tool. AAPG Bull., 64: 67-87.
84. Schwarzacher, W. and Fischer, A., 1982. Limestone-shale bedding and perturbation in the earth's orbit. In: G. Einsele and A. Seilacher (Editors), Cyclic and Event Stratification. Springer, Berlin, pp. 72-95.
85. Scudeler Baccelle, L. and Semenza, E., 1974. Flysch terrigeno con strutture contornitiche nel Cretacico delle Dolomiti Ampezzane. Caratteristiche sedimentologiche e significato paleoambientale. Ann. Univ. Ferrara, Sez. 9, 5, 9: 165-199.
86. Shackleton, N.J., Hall, M.A. and Pate, D., 1993. High-resolution stable isotope stratigraphy from bulk sediment. Paleoceanography, 8: 141-148.
87. Shaw, T.J., Gieskes, J.M. and Jahnke, R.A., 1990. Early diagenesis in differing depositional environments: The response of transition metals in pore water. Geochim. Cosmochim. Acta, 54: 1233-1246.
88. Sissingh, W., 1977. Biostratigraphy of Cretaceous calcareous nannoplankton. Geol. Mijnbouw, 56: 37-65.
89. Sliter, W.V., 1989. Biostratigraphic zonation for Cretaceous planktonic foraminifers examined in thin section. J. Foraminiferal Res., 19: 1-19.
90. Spicer, R.A. and Corfield, R.M., 1992. A review of terrestrial and marine climates in the Cretaceous with implications for modelling the "Greenhouse Earth". Geol. Mag., 129: 169-180.
91. Stein, R., Rullkötter, J. and Welte, D.H., 1986. Accumulation of organic-carbon-rich sediments in the Late Jurassic and Cretaceous Atlantic Ocean - A synthesis. Chem. Geol., 56: 1-32.
92. Thierstein, H.R., 1973. Lower Cretaceous calcareous nannoplankton biostratigraphy. Ab. Geol. Bund., A 29: 1-52.
93. Thierstein, H.R., 1976. Mesozoic calcareous nannoplankton biostratigraphy of marine sediments. Mar. Micropaleontol., 1: 325-362.
94. Thierstein, H.R. and Roth, P.H., 1991. Stable isotopic and carbonate cyclicity in Lower Cretaceous deep-sea sediments: dominance of diagenetic effects. Mar. Geol., 97: 1-34.
95. Tornaghi, M.E., Premoli Silva, I. and Ripepe, M., 1989. Lithostratigraphy and planktonic foraminiferal biostratigraphy of the Aptian-Albian "Scisti a Fucoidi" in the Piobbico core, Marche, Italy: background for cyclostratigraphy. Riv. Ital. Paleontol. Stratigr., 95: 223-264.
96. Tribovillard, N.P., Desprairies, A., Lallier-Vergès, E., Bertrand, P., Moureau, N., Ramdani, A. and Ramanampisoa, L., 1994. Geochemical study of organic-matter rich cycles from the Kimineridge Clay Formation of Yorkshire (UK): productivity versus anoxia. Palaeogeogr. Palaeoclimatol. Palaeoecol., 108: 165-181.
97. Van Os, B.J.H., Lourens, L.J., Hilgen, F.J. and De Lange, G.J., 1994. The formation of Pliocene sapropels and carbonate cycles in the Mediterranean: Diagenesis, dilution, and productivity. Paleoceanography, 9: 601-617.
98. Watkins, D.K., 1989. Nannoplankton productivity fluctuations and rhythmically-bedded pelagic carbonates of the Greenhorn Limestones (Upper Cretaceous). Palaeogeogr. Palaeoclimatol. Palaeoecol., 74: 75-86.
99. Wedepohl, K.H., 1978. Manganese: abundance in common sediments and sedimentary rocks. In: Handbook of Geochemistry. Springer, Berlin, II/3, pp. 1-17.
100. Weissert, H., 1989. C-isotope stratigraphy, a monitor of paleoenvironmental change: a case study from the Early Cretaceous. Surv. Geophys., 10: 1-61.
101. Weissert, H. and Bréhéret, J.G., 1991. A carbonate carbon-isotope record from the Aptian-Albian sediments of the Vocontian trough (SE France). Bull. Soc. Geol. Fr., 162: 1133-1140.
102. Weissert, H. and Channell, J.E.T., 1989. Tethyan carbonate carbon isotope stratigraphy across the Jurassic-Cretaceous boundary: an indicator of decelerated global carbon cycling? Paleoceanography, 4/4:483-494.
103. Weissert, H. and Lini, A., 1991. Ice age interlude during the time of Cretaceous greenhouse climate? In: D.W. Müller et al. (Editors), Controversies in Modern Geology. Academic Press, London, pp. 173-191.
104. 2: Natural Variations Archean to Present (Geophys. Monogr., 32). AGU, Washington, pp. 531-545.
105. Winterer, L. and Bosellini, A., 1981. Subsidence and sedimentation on Jurassic passive continental margin, Southern Alps, Italy. AAPG Bull., 65: 394-421.
106. Wonders, A.A.H., 1980. Planktonic foraminifera of the Middle and Late Cretaceous of the western Mediterranean area. Utrecht Micropaleontol. Bull., 24, 157 pp.