The base of the campanian stage does not have a ratified global stratotype section and point gssp. Mesozoic calcareous nannofossil assemblages recovered during ocean drilling program leg 149 from the iberia abyssal plain off the coast of portugal were examined to determine the age of the rifting processes that affected the western iberia margin. Calcareous nannofossils are widely used in cenozoic marine biostratigraphy. This study presents the foraminiferal and calcareous nannofossil biostratigraphies of the three sections proposed as candidates for the coniaciansantonian boundary stratotype. Highresolution nannofossil data indicate changes in the composition, abundance and diversity of the midoligocene 30. A thorough understanding of the cenozoic niger delta will improve understanding and exploration of the evolution of deeper offshore belts, help researchers.
The paper particularly focuses on the campanian maastrichtian interval that forms the bulk of the upper cretaceous sediments recovered during leg 198. A detailed nannofossil zonation has been derived for the cenomanian. The calcareous nannoplankton biostratigraphy is im portant in the. Research the international nannoplankton association. Applications of calcareous nannofossils and stable. Highresolution calcareous nannofossil biostratigraphy of. This paper presents the results of shorebased calcareous nannofossil biostratigraphy of the upper cretaceous sites 120712, represented by 409 samples.
This study aims to contribute in the understanding of highresolution biostratigraphy and paleoecologic interpretations. Pdf a cenozoic calcareous nannofossil biozonation from. Kent d,e, domenico rio a a department of geology, paleontology and geophysics, university of padova, via giotto, 1 i357 padova, italy b department of earth sciences, university of milan, via mangiagalli 34, i. Application of calcareous nannofossil to petroleum.
However, a very short nannofossil break is noted within zone np10 subzones np10b and np10c are missing which is overlain by zone np11. Early miocene quantitative calcareous nannofossil biostratigraphy from the tropical atlantic waheed a. Palynomorphs, foraminifera and calcareous nannofossils biostratigraphy of campanianturonian sediments in bornu basin, northeastern nigeria adeyemi o. Paleoclimatic and biostratigraphic significance of calcareous mannofossils from. Five biozones reinhardtites levis, arkhangelskiella cymbiformis, lithraphidites quadratus, micula murus, and micula prinsii were distinguished. The preservation of calcareous nannofossils ap pear to. The biostratigraphic interpretations are based mainly on the lowest occurrence lo and highest occurrence ho of the marker species. Ocean drilling program scientific results, 1, 465 487. Late cretaceous calcareous nannofossil biostratigraphy and. Eocene biostratigraphy and magnetic stratigraphy from possagno, italy. Biozonation and biochronology of miocene through pleistocene calcareous nannofossils from low and middle latitudes jan backman 1, isabella raffi 2, domenico rio 3, eliana fornaciari 3, and heiko palike 4 with 10 figures and 4 tables abstract. Calcareous nannofossil biostratigraphy 85 biostratigraphic interpretations hole 965a only one hole was drilled at site 965. Calcareous nannofossil revised biostratigraphy of the.
This biostratigraphy, based on the investigation of numerous sections from europe, north america, and africa, allows accurate correlation of sections from shelf and deep. A calcareous nannofossils biostratigraphic study has been carried out on the strata penetrated of well 02 located in the shallow offshore area of the niger delta, nigeria. The two sections were analyzed spanning an interval from l. Jul 31, 2017 international journal of scientific engineering and science volume 1, issue 6, pp. Adeagbo 2 1department of geology, university of ibadan, ibadan, nigeria. Currently, published nannofossil schemes for the coniaciansantonian lack the resolution necessary to define this stage boundary figure 1. Eocene biostratigraphy and magnetic stratigraphy from. Principle of faunal succession rocks formed during any particular interval of geologic time can be recognized and distinguished by their fossil content from rocks formed during other time intervals.
The examination of the studied samples resulted in the identification of thirtysix calcareous nannoplankton species belonging to twentythree. Watkins quantitative analysis for the lower miocene of ocean drilling program hole 959a from the west african margin was performed to. Moreover, the cal careous nannofossil biozonation has been correlated to the planktonic foraminiferal zones of berggren et al. Calcareous nannofossils biostratigraphy of oil shales from jordan.
These formations are the abu roash and the khoman from base to top, respectively. Nannofossil biostratigraphy of the paleocenelower eocene succession in the thamad area, east central sinai, egypt. Late eocene through oligocene calcareous nannofossils. A study of quantitative calcareous nannofossil biostratigraphy and magnetostratigraphy of a. International journal of scientific engineering and science volume 1, issue 6, pp. Calcareous nannofossil content of the maastrichtian succession at the western coast of the gulf of suez in egypt has been studied. Abundance data of nannofossil taxa were collected by quantitative methods. Integrated calcareous nannofossil biostratigraphy and. Cenozoic foraminifera and calcareous nannofossil biostratigraphy of the niger delta fills the gap for earth scientists and those working in the oil and gas industry.
The following counting methods were applied in this work. Calcareous nannofossil and planktonic foraminiferal. More elaborate biostratigraphic schemes for the middle and late jurassic were proposed by amezieux 1972, barnard and hay 1974, hamilton 1977, 1978, 1979, 1982, medd 1982. Oct 18, 2015 the upper cretaceous succession of the northwestern desert in egypt comprises two distinctive formations distributed throughout the studied subsurface succession. The only useful event is the fo of the horseshoe shaped genus amaurolithus.
Calcareous nannofossil biostratigraphy of the marine. Twentynine meters of olive gray to grayish orange laminated chalk with abundant bentonite, iron, and gypsum seams is exposed at locality. Site 1256 nannofossil biostratigraphy in chapter 1 refined the authors shorebased shipboard quaternarymiddlemiocene nannofossil biostratigraphy with 16 zonescombined zones recognized based on 28 nannofossil datums. Nannofossils definition of nannofossils by the free. Calcareous nannofossil biostratigraphy and assemblages of. For almost all taxa at least a short diagnosis, full citation, and geological range has been provided. The petroleum industry has utilized calcareous nannofossil and foraminiferal biostratigraphy in age determination and stratigraphic correlation for many decades in the gulf of mexico. Evolution of the cretaceous calcareous nannofossil genus. T1 highresolution calcareous nannofossil biostratigraphy of the santoniancampanian stage boundary, western interior basin, usa. Chapters on the mesozoic contain electron microscope illustrations as well as light. The upper cretaceous succession of the northwestern desert in egypt comprises two distinctive formations distributed throughout the studied subsurface succession. Jan 31, 2006 a study of quantitative calcareous nannofossil biostratigraphy and magnetostratigraphy of a.
Highresolution calcareous nannofossil biostratigraphy for. Application of calcareous nannofossil to petroleum exploration. Calcareous nannofossil biostratigraphy is the most comprehensive atlas of this fossil group ever produced, containing 65 full page plates with over 2,000 individual photographs, together with comments concerning stratigraphic distribution and identification. This paper presents the cenozoic nannofossil biostratigraphy of site 1208, focusing on the expanded neogene section, comprising an apparently continuous middle mioceneholocene succession zones cn5cn15, in which nannofloras are diverse and abundant throughout, and a fragmentary paleogenelower miocene section zones cp8 to cn1ccn2, which. Thus far a detailed calcareous nannofossil biostratigraphy is lacking. Nannofossil biostratigraphy, leg 22, deep sea drilling project stefan gartner, jr. Calcareous nannofossil biostratigraphy of a lower cretaceous. Calcareous nannofossil biostratigraphic study of the pugo. Kar dating on wellpreserved glauconite grains from the marnes duttins and lowermost part of the urgonien jaune delivered ages of 127.
Cenozoic foraminifera and calcareous nannofossil biostratigraphy of the niger delta is available just as exploration and production activities are moving into the little known deep water terrain of the niger delta. Calcareous nannofossil biostratigraphy of the pugo river section, philippines 57 and the nannofossil zone assignment nn11, the present study con. Calcareous nannofossil assemblages from the smoky hill member of the niobrara formation in the central western interior seaway. The two biozones of calcareous nannofossils identified from may01 and may02 wells were correlated based on their. Nannofossil biostratigraphy of neogene sediments in florida. Lithologies ranged from nannofossil ooze to clay in the upper four cores to packstones, grainstones, and wackestones containing only benthic. Sageman b a department of earth and atmospheric sciences, university of nebraska, lincoln, ne 68588, usa b department of earth and planetary sciences, northwestern university, evanston, il 60208, usa. Show less cenozoic foraminifera and calcareous nannofossil biostratigraphy of the niger delta is available just as exploration and production activities are moving into the little. Their application in calcareous nannofossil biostratigraphy and biochronology studies has been discussed at length by backman and shackleton 1983 and rio et al.
The calcareous nannofossil response to climate variability claudia agnini a, giovanni muttoni b,c, dennis v. Geological surveys, which merged last summer, just proior to the. Sudr formation the term sudr chalk was originally introduced by 34 for the chalky limestone succession exposed at wadi sudr, west central sinai. Calcareous nannofossil biostratigraphy and paleoecology of. Pdf calcareous nannofossil biostratigraphy of a, b, c, d. The paleoceneeocene boundary was placed at the base a of. His dissertation is on the impact of oae2 on nannofossil assemblages of the western interior and improving correlation to. He is studying midcretaceous calcareous nannofossils.
A thorough understanding of the cenozoic niger delta will improve understanding and exploration of the evolution of deeper offshore belts, help researchers strengthen and refine. Texas coastal plain biostratigraphy, sequence stratigraphy, and reservoir characterization. The response of calcareous nannofossil assemblages to the paleocene eocene thermal maximum at the walvis ridge in the south atlantic isabella raf. The hole consisted of 27 cores that reached a total depth of 240. The nannofossil assemblages are dominated by cyclicargolithus floridanus, sphenolithus moriformis and. Prediscosphaera biostratigraphy and paleoe cology of the. Watkins quantitative analysis for the lower miocene of ocean drilling program hole 959a from the west african margin was performed to document all. Five biozones reinhardtites levis, arkhangelskiella cymbiformis, lithraphidites quadratus, micula murus, and micula prinsii were. Other bioevents were used to improve nannofossil biostratigraphy. Jurassic calcareous nannofossil zonation and overview with.
Nannofossil biostratigraphy of the paleocenelower eocene. Nanofossils definition of nanofossils by the free dictionary. Calcareous nannofossils are an exceptionally import. Calcareous nannofossil quantitative biostratigraphy of holes 969e and 963b eastern mediterranean1 enrico di stefano2 abstract the distribution patterns of the selected biostratigraphically useful calcareous nannofossils were analyzed in the pliocene. Through decades of experience, biostratigraphers have developed a robust, empirically verified sequence of bioevents or markers for the offshore miocene sediments. The lower part of the latter covers the topmost part of the esna formation where its upper part lies within the base of the egma formation. The response of calcareous nannofossil assemblages to the. Calcareous nannofossil bioevents have been utilized as proxies for stage boundaries when macrofossil resolution is too coarse or macrofossils are poorly preserved. Upper berriasian to lower aptian calcareous nannofossil assemblages have been studied from a siliciclastic deepsea. Apr 12, 2014 calcareous nannofossil content of the maastrichtian succession at the western coast of the gulf of suez in egypt has been studied. The examination of the studied samples resulted in the identification of thirtysix calcareous nannoplankton species belonging to twentythree genera.
New biostratigraphic markers for onshore paleogene reservoir identification and characterization supplemental grant, texas higher education coordinating board, atp, 53105 through 7262005, d. Highresolution calcareous nannofossil biostratigraphy of the santoniancampanian stage boundary, western interior basin, usa zachary a. Turonian boundary interval consisting of three zones, two subzones, and nine additional biohorizons. Arthur 8r fiscaer 0977 and arthur 1979 surveyed and measured the section. William is examining the nannofossil biostratigraphy of the oligocene of the gulf of mexico and other areas. A previous study negri and vigliotti, 1997 revealed dif. Nannofossil biostratigraphy in the present study, the zonal schemes of martini 1971 and okada and bukry 1980 have been followed. The earliest calcareous nannofossil biostratigraphy was published by stradner 1963 before more detailed taxonomic studies were available. Petrography and mineralogy of the attarat um ghudran oil. Calcareous nannofossil biostratigraphy of mesozoic sediments recovered from the western pacific, leg 129.