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Journal articles on the topic 'Biozonation'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Berger, Jean-Pierre. "Redefinition of European Oligo - Miocene Charophyte Biozonation." Australian Journal of Botany 47, no. 3 (1999): 283. http://dx.doi.org/10.1071/bt97102.

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Recent studies concerning the Oligo–Miocene stratigraphy (35 to 5 million years ago) need the revision of the calibration of the European charophyte biozonation by Riveline et al. in 1996. Moreover, another charophyte biozonation elaborated in Spain by Feist et al. in 1994 also modifies this standard model. Presented here is a discussion and a possible solution to redefine the Standard European Charophyte biozonation during the Oligocene and Miocene.

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2

Noble, Paula, and Jonathan Aitchison. "Early Paleozoic radiolarian biozonation." Geology 28, no. 4 (April 2000): 367–70. http://dx.doi.org/10.1130/0091-7613(2000)028<0367:eprb>2.3.co;2.

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3

Noble, Paula, and Jonathan Aitchison. "Early Paleozoic radiolarian biozonation." Geology 28, no. 4 (2000): 367. http://dx.doi.org/10.1130/0091-7613(2000)28<367:eprb>2.0.co;2.

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4

Verniers, J., V. Nestor, F. Paris, P. Dufka, S. Sutherland, and G. Van Grootel. "A global Chitinozoa biozonation for the Silurian." Geological Magazine 132, no. 6 (November 1995): 651–66. http://dx.doi.org/10.1017/s0016756800018896.

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AbstractA global Chitinozoan biozonation for the Silurian Period is proposed. Each biozone is an interval range defined by the first occurrence of an index species, selected from well-defined species with a relatively short biostratigraphic range. To be included in the scheme, index species must have been recorded from at least two major Silurian palaeocontinents where usable Chitinozoa assemblages have been studied, that is, Avalonia—Baltica (which had already undergone collision by the Silurian), Laurentia, Gondwana and Southern China. Seventeen biozones are identified with seven in the Llandovery: the fragilis, postrobusta, electa, maennili, alargada, dolioliformis and longicollis biozones; four in the Wenlock: the margaritana, cingulata, pachycephala and lycoperdoides biozones; three in the Ludlow: the elongata, philipi and barrandei biozones; and three in the Přídolí: the kosovensis, elegans and superba biozones. Chronostratigraphic calibration is partly provided by reference to the range of the appropriate Chitinozoa index species in the global stratotype sections and points (GSSP) of the Silurian series, e.g. in Bohemia (Czech Republic) for the Přídolí and the Welsh Borderland in England for the Ludlow and part of the Wenlock. When this information was not available, independent biostratigraphic control was provided by calibration with graptolite biozones or in a few cases, conodont or trilobite biozonal schemes. The index and most characteristic species of each biozone are illustrated and their total stratigraphie range provided.

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5

Lirer, Fabrizio, Luca Maria Foresi, Silvia Maria Iaccarino, Gianfranco Salvatorini, Elena Turco, Claudia Cosentino, Francisco Javier Sierro, and Antonio Caruso. "Mediterranean Neogene planktonic foraminifer biozonation and biochronology." Earth-Science Reviews 196 (September 2019): 102869. http://dx.doi.org/10.1016/j.earscirev.2019.05.013.

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6

Zimmerman, Alexander N., Claudia C. Johnson, and P. David Polly. "Taxonomic and evolutionary pattern revisions resulting from geometric morphometric analysis of Pennsylvanian Neognathodus conodonts, Illinois Basin." Paleobiology 44, no. 4 (August 30, 2018): 660–83. http://dx.doi.org/10.1017/pab.2018.28.

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AbstractConodont fossils are highly valuable for Paleozoic biostratigraphy and for interpreting evolutionary change, but identifying and describing conodont morphologies, and characterizing gradual shape variation remain challenging. We used geometric morphometric (GM) analysis to conduct the first landmark-based morphometric analysis of the biostratigraphically useful conodont genus Neognathodus. Our objective is to assess whether previously defined morphotype groups are reliably distinct from one another. As such, we reevaluate patterns of morphologic change in Neognathodus P1elements, perform maximum-likelihood tests of evolutionary modes, and construct novel, GM-based biozonations through a Desmoinesian (Middle Pennsylvanian) section in the Illinois Basin. Our GM results record the entire spectrum of shape variability among Neognathodus morphotypes, thus alleviating the problem of documenting and classifying gradual morphologic transitions between morphotypes. Statistically distinct GM groups support previously established classifications of N. bassleri, N. bothrops, and N. roundyi. Statistically indistinct pairs of GM groups do not support literature designations of N. medadultimus and N. medexultimus, and N. dilatus and N. metanodosus, and we synonymize each pair. Maximum-likelihood tests of evolutionary modes provide the first statistical assessment of Neognathodus evolutionary models in the Desmoinesian. The most likely evolutionary models are an unbiased random walk or a general random walk. We name four distinct biozones through the Desmoinesian using GM results, and these align with previous biozonation structure based on the Neognathodus Index (NI), illustrating that Neognathodus-based biostratigraphic correlations would not change between GM or NI methods. The structural similarity between both biozonations showcases that determining GM-based biozones is not redundant, as this comparison validates using landmark-based GM work to construct viable biozonations for subsequent stratigraphic correlations. Although this study is limited to the Illinois Basin, our quantitative methodology can be applied broadly to test taxonomic designations of additional genera, interpret statistically robust evolutionary patterns, and construct valid biozones for this significant chordate group.

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7

Samuelsson, J., and J. Verniers. "Ordovician chitinozoan biozonation of the Brabant Massif, Belgium." Review of Palaeobotany and Palynology 113, no. 1-3 (December 2000): 105–29. http://dx.doi.org/10.1016/s0034-6667(00)00055-5.

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8

LÖFGREN, A. "Conodont biozonation in the upper Arenig of Sweden." Geological Magazine 137, no. 1 (January 2000): 53–65. http://dx.doi.org/10.1017/s0016756800003484.

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Conodont faunas from the Arenigian Lanna/Volkhov Stage in Baltoscandia have been the subject of intensive study, particularly during the last decade, and different biozonations based on them have been proposed. The application of some of these zones is discussed here. The present investigation is mainly based on 64 samples from ten sections in Sweden, but conodont collections from Bornholm (Denmark) and Tamsalu (Estonia) have also been studied. Lindström's (1971) concept of the upper Arenigian Microzarkodina parva Zone is essentially replaced by a revised Baltoniodus norrlandicus Zone. The zone corresponds closely to Bagnoli & Stouge's (1997) recently distinguished B. norrlandicus and Lenodus antivariabilis zones, which can be recognized in sections where a more detailed subdivision and correlation is possible under the names of the T. quadrangulum Subzone and the L. antivariabilis Subzone, respectively.

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9

Boomer, Ian D. "Lower Jurassic Ostracod Biozonation of the Mochras Borehole." Journal of Micropalaeontology 9, no. 2 (March 1, 1991): 205–18. http://dx.doi.org/10.1144/jm.9.2.205.

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Abstract. The extensive Lower Jurassic sequence at Mochras has yielded a diverse ostracod fauna which includes many new taxa. Poor preservation precludes a complete taxonomic review of this material although four new species (Cytherella praetoarcensis, Ogmoconcha convexa, Lophodentina striata and Oligocythereis? mochrasensis) are erected herein. Changes in the faunal composition and the rates of faunal turnover are briefly described. An ostracod biozonation is proposed for the section, comparison with established Lower Jurassic zonal schemes reveals that the present section is distinct from most other European sequences.

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10

Schönfeld, Joachim, and Jackie Burnett. "Biostratigraphical correlation of the Campanian–Maastrichtian boundary: Lägerdorf–Hemmoor (northwestern Germany), DSDP Sites 548A, 549 and 551 (eastern North Atlantic) with palaeobiogeographical and palaeoceanographical implications." Geological Magazine 128, no. 5 (September 1991): 479–503. http://dx.doi.org/10.1017/s001675680001863x.

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AbstractA correlation of the Campanian–Maastrichtian boundary is attempted using foraminiferal and nannoplankton data from two areas: the eastern North Atlantic and northwestern Germany. The Boreal benthic and Tethyan planktonic foraminiferal zonation schemes are applied to Site 548A, where both foraminiferal groups occur frequently. A direct comparison of both biozonations reveals that the base of the Maastrichtian, according to planktonic foraminifers, has to be placed in the Upper Campanian of the Boreal benthic foraminiferal biozonation, which concurs with the nannoplankton results. The Tethyan Middle and Upper Maastrichtian are probably equivalent to the Upper Maastrichtian in the Boreal sense. The bases of the Maastrichtian substages are thus diachronous between the Boreal and Tethyan realms. Palaeotemperatures (which were estimated using the oxygen isotopic composition of the Goban Spur chalks) indicate, in combination with palaeowind directions, that the faunal and floral distribution pattern recorded is the result of a stable, warm water outflow from the northwest European epicontinental seas through the Channel area to the Celtic Shelf sea and Goban Spur. This mechanism appears to have been a dominant separating factor of the Boreal and Tethyan bioprovinces on the western European Shelf.

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11

Huber, B. T. "REVISED PALEOGENE PLANKTONIC FORAMINIFERAL BIOZONATION FOR THE AUSTRAL REALM." Journal of Foraminiferal Research 35, no. 4 (October 1, 2005): 299–314. http://dx.doi.org/10.2113/35.4.299.

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12

Smith, R. M. H., B. S. Rubidge, M. O. Day, and J. Botha. "Introduction to the tetrapod biozonation of the Karoo Supergroup." South African Journal of Geology 123, no. 2 (June 1, 2020): 131–40. http://dx.doi.org/10.25131/sajg.123.0009.

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13

Moczydlowska, Malgorzata. "Acritarch biozonation and regional correlation of the Lower Cambrian." Geologiska Föreningen i Stockholm Förhandlingar 113, no. 1 (March 15, 1991): 87. http://dx.doi.org/10.1080/11035899109453834.

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14

Huber, Brian T. "Upper cretaceous planktic foraminiferal biozonation for the austra realm." Marine Micropaleontology 20, no. 2 (December 1992): 107–28. http://dx.doi.org/10.1016/0377-8398(92)90002-2.

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15

López-Martínez, Rafael, Ricardo Barragán, Daniela Reháková, and Jorge Luis Cobiella-Reguera. "Calpionellid distribution and microfacies across the Jurassic/ Cretaceous boundary in western Cuba (Sierra de los Órganos)." Geologica Carpathica 64, no. 3 (June 1, 2013): 195–208. http://dx.doi.org/10.2478/geoca-2013-0014.

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Abstract A detailed bed-by-bed sampled stratigraphic section of the Guasasa Formation in the Rancho San Vicente area of the “Sierra de los Órganos”, western Cuba, provides well-supported evidence about facies and calpionellid distribution across the Jurassic/Cretaceous boundary. These new data allowed the definition of an updated and sound calpionellid biozonation scheme for the section. In this scheme, the drowning event of a carbonate platform displayed by the facies of the San Vicente Member, the lowermost unit of the section, is dated as Late Tithonian, Boneti Subzone. The Jurassic/Cretaceous boundary was recognized within the facies of the overlying El Americano Member on the basis of the acme of Calpionella alpina Lorenz. The boundary is placed nearly six meters above the contact between the San Vicente and the El Americano Members, in a facies linked to a sea-level drop. The recorded calpionellid bioevents should allow correlations of the Cuban biozonation scheme herein proposed, with other previously published schemes from distant areas of the Tethyan Domain.

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16

Vandenbroucke, Thijs, Jacques Verniers, and Euan N. K. Clarkson. "A chitinozoan biostratigraphy of the Upper Ordovician and lower Silurian strata of the Girvan area, Midland Valley, Scotland." Transactions of the Royal Society of Edinburgh: Earth Sciences 93, no. 2 (June 2002): 111–34. http://dx.doi.org/10.1017/s0263593300000365.

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ABSTRACTForty-six samples, taken from the Upper Ordovician and lower Silurian strata of the Girvan district, Midland Valley of Scotland, yield moderately well-preserved and diverse assemblages of chitinozoans. The area was chosen to study the composition of the chitinozoan assemblages, rarely described before in Scotland, which lay at the south-eastern margin of the Laurentia palaeocontinent. These assemblages are compared with those of the same age on other palaeocontinents, representing a critical time when both the Iapetus and Tornquist oceans were closing, thus forming the Caledonide and associated orogens. It is possible to correlate the chitinozoan occurrences at Girvan with those of other parts of Laurentia (Quebec area), other palaeocontinents such as Baltoscandia (Sweden, Estonia), Avalonia (Wales, Brabant Massif) and some parts of Northern Gondwana (Saudi Arabia). For the lower Silurian, it is possible to correlate with the global chitinozoan biozonation, and a calibration between the chitinozoan occurrences and the graptolite biozonation of Girvan is established. Several levels within the Balclatchie, South Shore, Three Mile, Shalloch, Wood Burn, Lauchlan, Drumyork Flags and other formations are accurately dated.

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17

GRAHN, YNGVE. "Ordovician and Silurian chitinozoan biozones of western Gondwana." Geological Magazine 143, no. 4 (June 6, 2006): 509–29. http://dx.doi.org/10.1017/s001675680600207x.

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A formal Ordovician–Silurian chitinozoan biozonation for western Gondwana is proposed. This palaeogeographic province includes South America, and was located in medium to high latitudes during Ordovician and Silurian times. Ordovician chitinozoans are known from northern Argentina, southern Bolivia, and Brazil. Silurian chitinozoans occur in Brazil, northern Argentina, southern Bolivia and southern Peru. No published information is available about Ordovician–Silurian chitinozoans from Ecuador, Colombia or Venezuela. Altogether more than 150 localities (including wells and outcrops) are included in this study, and 154 species have been encountered. A biozonation based on the first occurrence of critical chitinozoan species is introduced. Five biozones are defined in the Ordovician (zones of Desmochitina sp. gr. minor, Conochitina decipiens, Eremochitina brevis, Lagenochitina obeligis and Tanuchitina anticostiensis), and nine in the Silurian (zones of Belonechitina postrobusta, Spinachitina harringtoni, Pogonochitina djalmai, Margachitina margaritana–Salopochitina monterrosae, Angochitina echinata, Eisenackitina granulata, Fungochitina kosovensis and the subzones of Sphaerochitina solutidina and Desmochitina cf. D. densa). These biozones are compared with known graptolite, conodont, acritarch and spore zones from the same area, and chitinozoan zones on a global basis.

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18

Loydell, David K. "A comment on a 'global Chitinozoa biozonation for the Silurian'." Newsletters on Stratigraphy 34, no. 2 (December 18, 1996): 127–28. http://dx.doi.org/10.1127/nos/34/1996/127.

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19

Itaki, Takuya, and Ken Ikehara. "Radiolarian biozonation for the upper Quaternary in the Japan Sea." Journal of the Geological Society of Japan 109, no. 2 (2003): 96–105. http://dx.doi.org/10.5575/geosoc.109.96.

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20

Agnini, Claudia. "Low to middle latitude Paleogene calcareous nannofossil biozonation and biochronology." Rendiconti online della Società Geologica Italiana 31 (July 2014): 9–10. http://dx.doi.org/10.3301/rol.2014.19.

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21

Bown, P. R., M. K. E. Cooper, and A. R. Lord. "A Calcareous Nannofossil Biozonation Scheme for the early to mid Mesozoic." Newsletters on Stratigraphy 20, no. 2 (December 20, 1988): 91–114. http://dx.doi.org/10.1127/nos/20/1988/91.

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22

Gallagher, L. T. "Calcareous nannofossil Biozonation of the Tertiary of the North Sea Basin." Newsletters on Stratigraphy 22, no. 1 (May 30, 1990): 21–41. http://dx.doi.org/10.1127/nos/22/1990/21.

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23

Itiowe, K., F. A. Lucas, and C. O. Olise. "Foraminiferal biostratigraphy and paleoenvironmental analysis of the sediments penetrated by Sahaiawei-1 well in the Northern Delta Depobelt, Niger Delta Basin." Global Journal of Geological Sciences 18 (November 3, 2020): 119–26. http://dx.doi.org/10.4314/gjgs.v18i1.10.

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Foraminifera biostratigraphy and paleoenvironmental analysis of the sediments penetrated by Sahaiawei-1 Well in the Northern Delta Depobelt, Niger Delta Basin was carried out in order to determine the foraminifera biozonation, age, paleobathymetry, depositional environment and paleo-oxygen condition of the well. The total foraminifera population recovered was two thousand, three hundred and sixty five (2365), with planktic foraminifera constituting one hundred and fifty four (154) forms, while calcareous benthic and agglutinated benthic foraminifera recovered accounted for two thousand, one hundred and sixty two (2162) and fourty nine (49) of the total foraminifera population respectively. The total foraminifera species recovered was fifty nine (59); planktic accounted for twenty (20) foraminifera species, while calcareous and agglutinated benthic foraminifera accounted for thirty one (31) and eight (8) foraminifera species respectively. Five benthic foramineferabiozones were identified: lumped P7-P13, P5-P6/P7, lumped P3-P4, lumped P1-P2 and M18 Zones of Blow (1969, 1979). The result of the analysis indicates that the entire analysed interval (1800ft – 10680ft) was deposited during the Late Maastrichtian to Late Eocene epoch. The depositional environments of the Well varied from littoral, marginal, shallow and deep marine environments. Keywords: Biozonation, Calcareous, Arenaceous, Agglutinated, Hyposaline Marshes, Hyposaline Shelf Sea

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24

Hayakawa, Tatsuya, and Hiromichi Hirano. "A revised inoceramid biozonation for the Upper Cretaceous based on high-resolution carbon isotope stratigraphy in northwestern Hokkaido, Japan." Acta Geologica Polonica 63, no. 2 (June 1, 2013): 239–63. http://dx.doi.org/10.2478/agp-2013-0010.

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Abstract Hayakawa, T., Hirano, H. 2013. A revised inoceramid biozonation for the Upper Cretaceous based on high-resolution carbon isotope stratigraphy in northwestern Hokkaido, Japan. Acta Geologica Polonica, 63 (2), 239-263. Warszawa. Biostratigraphic correlations of inoceramid bivalves between the North Pacific and Euramerican provinces have been difficult because the inoceramid biostratigraphy of the Japanese strata has been based on endemic species of the northwest Pacific. In this study, carbon stable isotope fluctuations of terrestrial organic matter are assembled for the Upper Cretaceous Yezo Group in the Haboro and Obira areas, Hokkaido, Japan, in order to revise the chronology of the inoceramid biozonation in Japan. The carbon isotope curves are correlated with those of marine carbonates in English and German sections with the aid of age-diagnostic taxa. According to the correlations of the carbon isotope curves, 11 isotope events are recognised in the sections studied. As a result of these correlations, the chronology of the inoceramid biozones of the Northwest Pacific has been considerably revised. The revised inoceramid biozones suggest that the timing of the origination and extinction of the inoceramids in the North Pacific biotic province is different from the stage/substage boundaries defined by inoceramids, as used in Europe and North America.

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25

ZALASIEWICZ, JAN, and MARK WILLIAMS. "Graptolite biozonation of the Wenlock Series (Silurian) of the Builth Wells district, central Wales." Geological Magazine 136, no. 3 (May 1999): 263–83. http://dx.doi.org/10.1017/s0016756899002599.

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The graptolite biozonation of the Wenlock Series in the Builth Wells district is reassessed. The graptolite fauna is dominated by relatively few, but variable, species of Monograptus s.s., Pristiograptus and Monoclimacis. These species are mostly long-ranging and are of limited biostratigraphical use. Biozonation is based largely on the relatively rare cyrtograptids. The lower Wenlock Series of the district comprises the widely recognized centrifugus, murchisoni and riccartonensis biozones. The middle to upper Wenlock biostratigraphy differs from that previously recognized in the UK. Above the riccartonensis Biozone, dubius, rigidus and lundgreni biozones are distinguished. Separate flexilis and ellesae biozones are not recognized: Monograptus flexilis appears earlier than, then largely co-exists with, Cyrtograptus rigidus s.l.; while Cyrtograptus ellesae appears later than Cyrtograptus lundgreni. The uppermost Wenlock nassa–ludensis Biozone is sparsely fossiliferous; its subdivision has not proved possible. This revised biostratigraphical scheme for the Wenlock Series of the Builth Wells district suggests that the Sheinwoodian–Homerian boundary, as defined in the Welsh Borderland, might occur within, rather than at the base of, the lundgreni Biozone. However, difficulties in correlation with other Wenlock sequences, particularly overseas, suggest significant biofacies control, with the Wenlock seas of the Builth Wells district appearing to have been periodically inhospitable to graptolites.

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26

Akmaluddin, Akmaluddin, Muhammad Virgiawan Agustin, and Ma’ruf Kurniawan Adi. "Stratigraphy and Foraminiferal Biostratigraphy of Sentolo Formation in Sedayu Area: Local Unconformity Identification in Early Pliocene." Journal of Applied Geology 3, no. 2 (August 7, 2019): 32. http://dx.doi.org/10.22146/jag.48596.

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The study area is located in Sedayu District, Bantul Regency, Special Regionof Yogyakarta Province which belongs to the Sentolo Formation. This area is an interesting place to study because there are erosional boundaries that indicate an unconformity in the Sentolo Formation. In this study, stratigraphic measurements and sampling were carried out in the field, then the samples were prepared and analyzed for the content of planktic and benthic foraminifera fossil. The results of the analysis are the determination of biozonation, paleobathimetry, and identification of sedimentation rates and unconformity. From the data analysis, ware known that the Sentolo Formation in Sedayu area can be divided into three lithofacies, namely thickening upward calcareous sandstone – calcareous siltstone facies, channel calcareous sandstone – calcareous siltstone facies andthinning upward limestone facies. Based on the biostratigraphy analysis, can be divided into four biozonations, namely the PL1A, PL1B, PL1C, and PL2 zones which are includedin the Early Pliocene age. There is an unconformity in the facies boundary of the channel calcareous sandstone – calcareous siltstone facies with thinning upward limestone facies, identified by the presence of an erosional boundary at that interval and also supported by sudden changes in paleobatimetry from Upper Bathyal to Middle Neritic. The sedimentation rate identified in this area has a value of 15.5 m / Ma which identified in the lower facies. The extrapolation results of age and sedimentation rates concluded that the unconformity occurred at 4.46–4.20 Ma, and eroded 4.03 m thick of sedimentary rocks

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27

Birkhead, Paul K. "Stromatoporoid biozonation of the Cedar City Formation, Middle Devonian of Missouri." Journal of Paleontology 60, no. 2 (March 1986): 268–72. http://dx.doi.org/10.1017/s002233600002179x.

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The Cedar City Formation is divisible into three stromatoporoid biozones. These zones are differentiated by the mutually exclusive stratigraphic occurrences of the species 1) Syringostroma astrorhizoides, 2) Stromatoporella congregabilis and 3) Stachyodes crebrum. Chronologically, the zones range from late Emsian to early Frasnian. Lithofacies of the Cedar City are not restrictive as to the stromatoporoid species they contain.

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28

VANDENBROUCKE, THIJS R. A. "An Upper Ordovician chitinozoan biozonation in British Avalonia (England and Wales)." Lethaia 41, no. 3 (September 2008): 275–94. http://dx.doi.org/10.1111/j.1502-3931.2007.00090.x.

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29

Nestor, V. "A summary and revision of the East Baltic Silurian chitinozoan biozonation." Estonian Journal of Earth Sciences 61, no. 4 (2012): 242. http://dx.doi.org/10.3176/earth.2012.4.05.

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30

Veseli, Vladimir, Ivo Velic, Igor Vlahovic, Josip Tisljar, and Damir Stankovic. "Biozonation of Sinemurian and Pliensbachian larger benthic foraminifera (Velebit Mt., Croatia)." Anuário do Instituto de Geociências 29, no. 1 (January 1, 2006): 368–69. http://dx.doi.org/10.11137/2006_1_368-369.

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31

Pedersen, Anette Mønsted. "Foraminiferal biozonation in the Early Pleistocene in the Central North Sea." Danmarks Geologiske Undersøgelse Serie C 13 (December 31, 1995): 1–56. http://dx.doi.org/10.34194/seriec.v13.7116.

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Pliocene and Pleistocene deposits from 66 boreholes from the central and northern North Sea have been examined for their content of benthic foraminifera. In this area the Pliocene/Pleistocene boundary is generally placed at the bottom or middle of the Elphidium oregonense Subzone or at the last local occurrence of Cibicides grossus. A detailed study of the temporal relationship between these two species in the western part of the Danish sector shows, that the last local occurrence of Cibicides grossus in this area is older than the Elphidium oregonense Subzone. On the basis of the results concerning the Lower Pleistocene an emendation of the foraminiferal biostratigraphy for this sub-series is proposed and related to previous work on the biostratigraphy and palaeogeography of the North Sea area. The investigation indicates the existence of two distinct new subzones within the Elphidiella hannai/Cassidulina teretis range: The oldest of the two new subzones is an Acme-zone with Buliminidae as the characteristic taxon, and it is named the Stainforthia/Bulimina Subzone. The depositional environment was a boreal shelf with a water depth presumed to exceed 100 m. Based on its stratigraphic position and enviromental indications the Subzone is referred to the Tiglian stage. The youngest of the two new subzones is a local Range-zone, defined by the presence of the arctic species Elphidiella gorbunovi, and it is named the Elphidiella gorbunovi Subzone. The depositional environment was an arctic shelf with a water depth of less than 50 m. The occurrence of Elphidiella gorbunovi in the central North Sea thus indicates a cold interval in either the Eburonian or the Menapian stage. Succeeding the Elphidiella gorbunovi Subzone, the foraminiferal fauna and the sediment indicate increasingly near-coastal environment and a warming of the climate.

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Pallikarakis, Aggelos, Ioannis Papanikolaou, Klaus Reicherter, Maria Triantaphyllou, Margarita Dimiza, and Olga Koukousioura. "Constraining the regional uplift rate of the Corinth Isthmus area (Greece), through biostratigraphic and tectonic data." Zeitschrift für Geomorphologie, Supplementary Issues 62, no. 2 (October 1, 2019): 127–42. http://dx.doi.org/10.1127/zfg_suppl/2019/0609.

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The eastern Corinth Gulf is constantly uplifted at least since Middle Pleistocene. This uplift is the combined result of the regional uplift and the activity of major active faults which influence the area. These tectonic movements which control the sedimentation processes of the study area resulted in a complex stratigraphy, paleogeography and paleoenvironment of the Corinth Isthmus. Stratigraphy supported with nannofossil biozonation data, demonstrates that marine sedimentation processes occurred during MIS 7 and MIS 5, providing some important constraints regarding the uplift rate of the area. An 0.22 ± 0.12 mm/yr uplift rate is extracted through nannofossils biozonation which is in agreement with published data from U/Th coral dating in a neighboring setting, adding confidence to the measured uplift rates. In order to constrain the regional uplift of the area, the influence of the surrounding active faults has been extracted. The latter has been implemented by extracting the influence of each individual active fault to the study site (using the fault geometry, fault slip-rates, the fault dip and the fault footwall uplift/ hangingwall subsidence ratio), in order to calculate the regional uplift rate. By considering the stratigra- phy and the biostratigraphy of the eastern part of the Corinth Isthmus and by extracting the influence of the active faults, a~0.34 ± 0.04 mm/yr regional uplift is calculated.

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Agnini, Claudia, Eliana Fornaciari, Isabella Raffi, Rita Catanzariti, Heiko Pälike, Jan Backman, and Domenico Rio. "Biozonation and biochronology of Paleogene calcareous nannofossils from low and middle latitudes." Newsletters on Stratigraphy 47, no. 2 (June 1, 2014): 131–81. http://dx.doi.org/10.1127/0078-0421/2014/0042.

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Morris, Peter H., Alex Cullum, Martin A. Pearce, and David J. Batten. "Megaspore assemblages from the Åre Formation (Rhaetian–Pliensbachian) offshore mid-Norway, and their value as field and regional stratigraphical markers." Journal of Micropalaeontology 28, no. 2 (November 1, 2009): 161–81. http://dx.doi.org/10.1144/jm.28.2.161.

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Abstract. A megaspore biozonation of the non-marine Åre Formation is proposed, based on a micropalaeontological analysis of key Haltenbanken area wells (Block 6608/11). The lower part of the Åre Formation is divisible into Banksisporites pinguis, Nathorstisporites hopliticus and Horstisporites areolatus zones, and subzones, occupying the Rhaetian–Hettangian interval. In the upper Åre Formation a marked turnover of megaspore assemblages is evident, with the appearance of several species of Trileites and the mesofossil Kuqaia quadrata. On this basis, the biozonation is extended into the Sinemurian–Pliensbachian, with the recognition of the Kuqaia quadrata Zone and subzones. Reference to selected wells in the Urd Field (Block 6608/10) and further south demonstrates that these biozones correlate across the northern Haltenbanken region. Biozonal boundaries are calibrated with miospore/microplankton markers where possible, to provide a robust bio-chronostratigraphical framework with which to evaluate the stratigraphy of the Åre Formation and its reservoir units. Comparison with published European biostratigraphical data shows that a similar megaspore succession exists through the Rhaeto-Liassic interval, with shifts in megaspore composition occurring within the same time intervals. On this evidence it is suggested that the megaspore biozones identified are regionally extensive and may reflect palaeoclimatic controls on the distribution of the megaspore-producing plants. It is concluded that megaspores are a stratigraphically important microfossil group, which should be utilized routinely in Upper Triassic–Jurassic oil field and regional biostratigraphical studies.

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Robert, Emmanuel, Luc Georges Bulot, Étienne Jaillard, and Bernard Peybernès. "Proposition d’une nouvelle biozonation par ammonites de l’Albien du Bassin andin (Pérou)." Comptes Rendus Palevol 1, no. 5 (December 2002): 267–74. http://dx.doi.org/10.1016/s1631-0683(02)00040-4.

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OSTERMAN, L. E., M. A. BUZAS, and L. A. C. HAYEK. "SHE Analysis for Biozonation of Benthic Foraminiferal Assemblages from Western Arctic Ocean." PALAIOS 17, no. 3 (June 1, 2002): 297–303. http://dx.doi.org/10.1669/0883-1351(2002)017<0297:safbob>2.0.co;2.

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Fioroni, Chiara, Giuliana Villa, Davide Persico, Sherwood W. Wise, and Laura Pea. "Revised middle Eocene-upper Oligocene calcareous nannofossil biozonation for the Southern Ocean." Revue de Micropaléontologie 55, no. 2 (April 2012): 53–70. http://dx.doi.org/10.1016/j.revmic.2012.03.001.

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38

Truyols-Massoni, M. "Devonian homoctenids of the Cantabrian zone (NW, Spain): An attempt of biozonation." Geobios 22, no. 5 (January 1989): 671–76. http://dx.doi.org/10.1016/s0016-6995(89)80120-2.

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39

Pashko, Pandeli Llazar. "Upper Silurian (Gorstian, Ludfordian, PŘÍDOLÍ) Graptolite Biozonation in the Muhurr area (Albania)." Bulletin of the Geological Society of Greece 56, no. 1 (April 24, 2020): 147. http://dx.doi.org/10.12681/bgsg.21688.

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Three stratigraphical sections and several outcrops through the upper Silurian graptolite shales of the Muhurr area, Albania have been revised. Based on a new detailed re-examination and re-evaluation of graptolite collections and previously unpublished and published studies, a biozonal scheme with much new biostratigraphical data is established. The graptolite assemblages are dominated by Monograptidae: Neodiversograptus, Saetograptus, Bohemograptus, Colonograptus, Pseudomonoclimacis and Lobograptus which are associated with several Retiolitidae. A total of 37 graptolite species has been identified; selected important species are illustrated. The present study recognized and defined the following seven upper Silurian graptolite biozones: nilssoni and scanicus-chimaera in the Gorstian Stage, leintwardinensis, tenuis and formosus in the Ludfordian Stage and parultimus-ultimus and perneri in the Přídolí Series.

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Rasmussen, Bo Wilhelm, Jan Audun Rasmussen, and Arne Thorshøj Nielsen. "Biozonation of the Furongian (upper Cambrian) Alum Shale Formation at Hunneberg, Sweden." GFF 138, no. 4 (May 24, 2016): 467–89. http://dx.doi.org/10.1080/11035897.2016.1168866.

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Siesser, William G., David J. Ward, and Alan R. Lord. "Calcareous nannoplankton biozonation of the Thanetian Stage (Palaeocene) in the type area." Journal of Micropalaeontology 6, no. 1 (May 1, 1987): 85–102. http://dx.doi.org/10.1144/jm.6.1.85.

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Abstract. The Thanetian Stage in the type area is composed of the Thanet Formation, the Woolwich Bottom Bed and the Oldhaven Beds. The Thanet Formation at the stratotype localities in southeastern England contains calcareous nannoplankton Zones NP 6/7 and NP 8. The Woolwich Bottom Bed and Oldhaven Beds are not zonable in the type area. The marine “Bottom Bed” of the Woolwich and Reading Beds is, however, assignable to Zone NP 9 outside the type area (at Clarendon Hill in Wiltshire).

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Zhen, Yong Yi, and Ian G. Percival. "Late Ordovician conodont biozonation of Australia—current status and regional biostratigraphic correlations." Alcheringa: An Australasian Journal of Palaeontology 41, no. 3 (March 21, 2017): 285–305. http://dx.doi.org/10.1080/03115518.2017.1282982.

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Fadiya, Lawrence Suyi, and Babajide Moshood Salami. "A Neogene calcareous nannofossil biozonation scheme for the deep offshore Niger Delta." Journal of African Earth Sciences 112 (December 2015): 251–75. http://dx.doi.org/10.1016/j.jafrearsci.2015.08.018.

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Braun, Andreas, and Reinhard Schmidt-Effing. "Biozonation, diagenesis and evolution of radiolarians in the Lower Carboniferous of Germany." Marine Micropaleontology 21, no. 4 (May 1993): 369–83. http://dx.doi.org/10.1016/0377-8398(93)90027-u.

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Smith, Tegan, John Laurie, Lisa Hall, Robert Nicoll, Andrew Kelman, and James Ogg. "The times they are a-changin': Australian biozones, petroleum basins, and the international geologic time scale (GTS) 2012." APPEA Journal 54, no. 2 (2014): 473. http://dx.doi.org/10.1071/aj13046.

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The international Geologic Time Scale (GTS) continually evolves due to refinements in age dating and the addition of more defined stages. The GTS 2012 has replaced GTS 2004 as the global standard timescale, resulting in changes to the age and duration of most chronological stages. These revisions have implications for interpreted ages and durations of sedimentary rocks in Australian basins, with ramifications for petroleum systems modelling. Accurate stratigraphic ages are required to reliably model the burial history of a basin, hence kerogen maturation and hydrocarbon expulsion and migration. When the resolution of the time scale is increased, models that utilise updated ages will better reflect the true basin history. The international GTS is largely built around northern hemisphere datasets. At APPEA 2009, Laurie et al. announced a program to tie Australian biozones to GTS 2004. Now, with the implementation of GTS 2012, these ties are being updated and refined, requiring a comprehensive review of the correlations between Australian and International biozonation schemes. The use of Geoscience Australia’s Timescales Database and a customised ‘Australian Datapack’ for the visualisation software package TimeScale Creator has greatly facilitated the transition from GTS 2004 to GTS 2012, as anticipated in the design of the program in 2009. Geoscience Australia’s basin biozonation and stratigraphy charts (e.g. Northern Carnarvon and Browse basins) are being reproduced to reflect the GTS 2012 and modified stratigraphic ages. Additionally, new charts are being added to the series, including a set of onshore basin charts, such as the Georgina and Canning basins.

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Backman, Jan, Isabella Raffi, Domenico Rio, Eliana Fornaciari, and Heiko Pälike. "Biozonation and biochronology of Miocene through Pleistocene calcareous nannofossils from low and middle latitudes." Newsletters on Stratigraphy 45, no. 3 (November 1, 2012): 221–44. http://dx.doi.org/10.1127/0078-0421/2012/0022.

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47

Löfgren, Anita M. "Arenig (Lower Ordovician) conodonts and biozonation in the eastern Siljan district, central Sweden." Journal of Paleontology 68, no. 6 (November 1994): 1350–68. http://dx.doi.org/10.1017/s0022336000034338.

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Based on biostratigraphic investigations in the eastern Siljan district, central Sweden, and combined with earlier studies at Hunneberg, south-central Sweden, it is shown that the early post-Tremadoc-age Paroistodus proteus conodont Zone can be divided into four successive subzones. These are, in ascending order: the Drepanoistodus aff. D. amoenus Subzone; the Tripodus Subzone; the Paracordylodus gracilis Subzone; and the Oelandodus elongatus-Acodus deltatus deltatus Subzone. The lowermost of the subzones is a concurrent range zone, with its reference section at Storeklev, Hunneberg, and the other three interval zones with the reference section at Sjurberg in the eastern Siljan district. Correlations between these two areas, as well as with the Flåsjö area, Jämtland, the Finngrundet core, and some other areas, are discussed, and it is concluded that the Drepanoistodus aff. D. amoenus Subzone and the Tripodus Subzone together correspond to the Megistaspis (Ekeraspis) armata trilobite Zone, and occur below the Hunnegraptus copiosus graptolite Zone. The Paracordylodus gracilis Subzone is equivalent with the lower part of the Megistaspis (Varvaspis) planilimbata trilobite Zone, and may correspond to the Hunnegraptus copiosus Zone. The uppermost subzone, the Oelandodus elongatus-Acodus deltatus deltatus Subzone, equals the upper part of the M. (V.) planilimbata Zone, and the local base of the Tetragraptus phyllograptoides graptolite Zone is close to the base of this conodont subzone. The last occurrences of T. phyllograptoides are close to the top of this conodont subzone. Also included in the investigation are the uppermost part of the uppermost Tremadoc Paltodus deltifer Zone and the conodont zones overlying the P. proteus Zone in the eastern Siljan district, the Prioniodus elegans Zone and the Oepikodus evae Zone; the latter zone corresponds to the trilobite zones of Megalaspides (M.) dalecarlicus and Megistaspis (Varvaspis) estonica. A few samples from the superimposed Baltoniodus triangularis, B. navis, and Paroistodus originalis Zones have been investigated and are described as well. The correlation of these conodont zones and subzones with those of areas outside Baltoscandia, particularly North America, is also discussed.

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Challands, T. J., T. R. A. Vandenbroucke, H. A. Armstrong, and J. R. Davies. "Chitinozoan biozonation in the upper Katian and Hirnantian of the Welsh Basin, UK." Review of Palaeobotany and Palynology 210 (November 2014): 1–21. http://dx.doi.org/10.1016/j.revpalbo.2014.07.001.

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EGENHOFF, SVEN O., JÖRG MALETZ, and BERND-DIETRICH ERDTMANN. "Lower Ordovician graptolite biozonation and lithofacies of southern Bolivia: relevance for palaeogeographic interpretations." Geological Magazine 141, no. 3 (May 2004): 287–99. http://dx.doi.org/10.1017/s0016756804009239.

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The interpretation of the lithofacies and basin evolution of the early Ordovician of southern Bolivia is based on a number of sections on an E–W transect. Lithostratigraphic units are extremely diachronous and only the available data on the graptolite biostratigraphy enabled an interpretation of the basin evolution. The newly proposed graptolite biozonation includes the biozones of Rhabdinopora flabelliformis, Adelograptus sp., Araneograptus murrayi, Hunnegraptus copiosus, Tetragraptus phyllograptoides, Expansograptus protobalticus, Expansograptus holmi, Baltograptus minutus, Azygograptus lapworthi and Isograptus victoriae. Isograptus victoriae is the first isograptid identified from Gondwanan South America. The early Ordovician succession of southern Bolivia is the most complete one documented from South America and can be used as a standard for this continent. The faunas are most easily correlated with the faunal succession of Scandinavia and without doubt belong to the Atlantic graptolite faunal province. They show distinct differences from coeval faunas of the Argentine Precordillera, referable to the Pacific faunal province.

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Morzadec, Pierre. "Évolution, biozonation et biogéographie de protacanthina gandl, trilobite du dévonien inférieur Nord-Gondwanien." Geobios 23, no. 6 (January 1990): 719–35. http://dx.doi.org/10.1016/s0016-6995(06)80338-4.

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