Integrated biostratigraphy of planktonic Foraminifera, calcareous nannofossils, radiolarians and diatoms of Middle and Upper Miocene sequences of central and northeast Honshu, Japan

1984 ◽  
Vol 31 (12) ◽  
pp. 871
Keyword(s):  
Planktonic Foraminifera ◽  
Calcareous Nannofossils ◽  
Upper Miocene

scholarly journals Stratigraphy of Cretaceous to Lower Pliocene sediments in the northern part of Cyprus based on comparative 87Sr/86Sr isotopic, nannofossil and planktonic foraminiferal dating

2012 ◽  
Vol 150 (2) ◽  
pp. 333-359 ◽  
Author(s):  
GILLIAN A. MCCAY ◽  
ALASTAIR H. F. ROBERTSON ◽  
DICK KROON ◽  
ISABELLA RAFFI ◽  
ROBERT M. ELLAM ◽  
...  
Keyword(s):  
Planktonic Foraminifera ◽  
Isotope Analysis ◽  
Early Miocene ◽  
Calcareous Nannofossils ◽  
Sr Isotope ◽  
Upper Eocene ◽  
Sediment Reworking ◽  
Upper Miocene ◽  
The North ◽  
North And South

AbstractNew age data from Sr isotope analysis and both planktonic foraminifera and nannofossils are presented and discussed here for the Upper Eocene–Upper Miocene sedimentary rocks of the Değirmenlik (Kythrea) Group. New dating is also given of some Cretaceous and Pliocene sediments. In a revised stratigraphy the Değirmenlik (Kythrea) Group is divided into ten formations. Different Upper Miocene formations are developed to the north and south of a regionally important, E–W-trending syn-sedimentary fault. The samples were dated wherever possible by three independent methods, namely utilizing Sr isotopes, calcareous nannofossils and planktonic foraminifera. Some of the Sr isotopic dates are incompatible with the nannofossil and/or the planktonic foraminiferal dates. This is mainly due to reworking within gravity-deposited or current-affected sediments. When combined, the reliable age data allow an overall biostratigraphy and chronology to be erected. Several of the boundaries of previously defined formations are revised. Sr data that are incompatible with well-constrained biostratigraphical ages are commonly of Early Miocene age. This is attributed to a regional uplift event located to the east of Cyprus, specifically the collision of the Anatolian (Eurasian) and Arabian (African) plates during Early Miocene time. This study, therefore, demonstrates that analytically sound Sr isotopic ages can yield geologically misleading ages, particularly where extensive sediment reworking has occurred. Convincing ages are obtained when isotopic dating is combined with as many forms of biostratigraphical dating as possible, and this may also reveal previously unsuspected geological events (e.g. tectonic uplift or current activity).

Micropaleontological proxies as tool to date serpentinite mud volcanisms and seamount subduction and to reconstruct paleoenvironmental conditions in the Mariana convergent margin system (IODP Expedition 366)

2020 ◽  
Author(s):  
Arianna Valentina Del Gaudio ◽  
Werner E. Piller ◽  
Gerald Auer ◽  
Patrick Grunert ◽  
Walter Kurz
Keyword(s):  
Benthic Foraminifera ◽  
Planktonic Foraminifera ◽  
Detailed Comparison ◽  
Extreme Environment ◽  
Tropical Species ◽  
Calcareous Nannofossils ◽  
Pelagic Sediment ◽  
Convergent Margin ◽  
Flow Activity ◽  
Mud Flow

<p>The Mariana forearc system represents the only known currently active serpentine mud volcanism in a convergent margin setting. Here, International Ocean Discovery Program (IODP) Expedition 366 recovered material from three serpentinite mud volcanoes at increasing distances from the Mariana trench subduction zone along a south-to-north transect: Yinazao (Blue Moon), Fantangisña (Celestial), and Asùt Tesoru (Big Blue). Cores contain serpentinite mud with lithic clasts from the subducting Pacific Plate, forearc crust and mantle. Furthermore, at almost all drilled sites, a thin cover of pelagic sediment containing planktic and benthic foraminifera, calcareous nannofossils, radiolaria and sponge spicules was recovered, constraining the most recent mud volcano activity. The base of the seamounts overlies pelagic sediment and volcanic ash/tephra layers which establish a maximum age for the mud activity. Additionally, separate serpentinite mud flows are intercalated by distinct sedimentary layers.</p><p>Integrated biostratigraphy, based on planktonic foraminifera and calcareous nannofossils, is used to assess the minimum and maximum age of mud flow activity and of the distinct sedimentary layers and serpentinite mud flow layers. Biostratigraphic information will also provide time indications on lower plate dehydration and serpentinization of the forearc wedge. Preliminary results from Fantangisña seamount (Site U1497 and U1498) reveal the existence of biostratigraphic marker species for both planktonic foraminifera and calcareous nannofossils. Specifically, the presence of <em>Globigerinella calida</em>, <em>Globorotalia flexuosa</em>, <em>Globorotalia truncatulinoides</em>, <em>Globorotalia tumida</em>, <em>Sphaeroidinella dehiscens</em> (amongst planktic foraminifera) and <em>Gephyrocapsa</em> spp., <em>Pseudoemiliania lacunosa</em>, <em>Reticulofenestra asanoi</em>, <em>Discoaster deflandrei</em>, <em>Discoaster variabilis</em> (amongst calcareous nannofossils) allow a possible age assessment from Late Pleistocene to Late Miocene.</p><p>Planktonic assemblages are dominated by (sub)tropical Globigerinoides forms such as <em>G. conglobatus</em>, <em>G. ruber</em>, <em>G. elongatus</em>, <em>G. sacculifer</em>, <em>G. trilobus</em>. Other common (sub)tropical species detected are G<em>. menardii</em>, and <em>O. universa</em>, whereas <em>G. siphonifera</em>, <em>N. dutertrei</em>, <em>S. dehiscens</em> and <em>P. obliquiloculata</em> are less common.</p><p>Benthic foraminifera are less abundant but show high diversity. Forms of <em>Lagena</em>, <em>Cibicidoides</em>, <em>Fissurina</em>, <em>Ehrenbergina</em>, <em>Gyroidina</em>, <em>Melonis</em>, <em>Pullenia</em>, <em>Osangularia</em>, <em>Favulina</em>, <em>Reophax</em>, <em>Rhabdammina</em>, <em>Saccorhiza</em>, and <em>Hormosinella</em> are present. To the best of our knowledge, the occurrence of benthic forms in such environments is highly unusual and has not been recorded in detail so far.</p><p>Quantitative and statistical analyses on foraminifera assemblages will provide information on water column and bottom water conditions. Moreover, a detailed comparison between assemblages pre- and post-volcanism may reflect possible changes in the ecological conditions.</p><p>Collected data will not only allow to constrain in time the evolution of submarine volcanoes in the Mariana convergent system but also to investigate foraminifera ecology in such an extreme environment.</p><p> </p>

scholarly journals Berriasian planktonic foraminifera and calcareous nannofossils from Crimea Mountains, with reference to microfossil evolution

2018 ◽  
Vol 138 (2) ◽  
pp. 213-236 ◽  
Author(s):  
F. M. Gradstein ◽  
A. Waskowska ◽  
L. Kopaevich ◽  
D. K. Watkins ◽  
H. Friis ◽  
...  
Keyword(s):  
Planktonic Foraminifera ◽  
Calcareous Nannofossils

scholarly journals BP Gulf of Mexico Neogene Astronomically-tuned Time Scale (BP GNATTS)

2019 ◽  
Vol 131 (11-12) ◽  
pp. 1871-1888 ◽  
Author(s):  
J.A. Bergen ◽  
S. Truax ◽  
E. de Kaenel ◽  
S. Blair ◽  
E. Browning ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Time Scale ◽  
Eastern Mediterranean ◽  
Planktonic Foraminifera ◽  
Calcareous Nannofossils ◽  
Scale Parameters ◽  
Ocean Drilling ◽  
Astronomical Tuning ◽  
Gulf Of Mexico Basin ◽  
Fifth Order

Abstract This paper introduces an integrated Neogene microfossil biostratigraphic chart developed within post-merger BP for the Gulf of Mexico Basin and is the first published industrial framework “fully-tuned” to orbital periodicities. Astronomical-tuning was accomplished through a 15-year research program on the Ocean Drilling Program’s (ODP) Leg 154 sediments (offshore NE Brazil) with sampling resolution for calcareous nannofossils and planktonic foraminifera ∼20 k.y. and 40 k.y. (thousand year), respectively. This framework extends from the Late Oligocene (25.05 Ma) to Recent at an average Chart Horizon resolution for the Neogene of 144 k.y., approximately double that of published Gulf of Mexico biostratigraphic charts and a fivefold increase over the highest resolution global calcareous microfossil biozonation. Such resolution approximates that of fourth to fifth order parasequences and is a critical component in the verification of seismic correlations between mini-basins in the deep-water Gulf of Mexico. Its utility in global time-scale construction and correlation has been proven, in part, by application of the scheme in full to internal research for the Oligocene–Miocene boundary interval on the global boundary stratotype section and point (GSSP) in northern Italy and offshore wells in the eastern Mediterranean Sea. This step change in Neogene resolution, now at the level of cyclostratigraphy (the orbital periodicity of eccentricity) and the magnetostratigraphic chron, demonstrates the potential for calcareous microfossil biostratigraphy to more consistently reinforce correlations of these time scale parameters. The integration of microfossil disciplines, consistent taxonomies, and rigorous analytical methodologies are all critical to obtaining and reproducing this new level of biostratigraphic resolution.

Structural evolution of the early Miocene in the eastern Betic internal-external zone boundary (SE Spain)

2001 ◽  
Vol 172 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Jose Enrique Tent-Manclu ◽  
Manuel Martin-Martin ◽  
Jose Antonio Martin-Perez ◽  
Francisco Serrano
Keyword(s):  
Planktonic Foraminifera ◽  
Structural Evolution ◽  
The Other ◽  
Calcareous Nannofossils ◽  
Zone Boundary ◽  
Geodynamic Evolution ◽  
Se Spain ◽  
External Zone ◽  
Internal Zone ◽  
The Moment

Abstract The Internal-External Zone boundary (IEZB) in the eastern Betic Cordillera partially coincides with the Cadiz-Alicante Accident, mainly a major transcurrent fault of N060E direction. The study of an area located along the IEZB at a point where it separates from the Cadiz-Alicante accident has provided details concerning the geodynamic evolution of the cordillera at the moment of its structuration. Here the Internal Zone, consists of rocks assigned to the Malaguide Complex, dating its last sedimentation to the Aquitanian, and deposits assigned to the Vinuela Group (early-middle Burdigalian). The nappes of the Internal Zone were emplaced during the latest Aquitanian and the Vinuela Group (here the El Nino Formation) sealed it but was afterwards affected by the collision with the External Zone. On the other side of the boundary, the External Zone comprises two tectonic units: the Penarrubia Unit (late Cretaceous-middle Burdigalian), which is made up mainly of limestones and marls, and the El Frances Chaotic Complex composed by a set of different lithologies, all from the External Zone in a marly matrix that could be interpreted as a collisional melange formed in the early-middle Burdigalian. The contact between the two domains corresponds to a backthrust of the External Zone over the Internal Zone which occurred in the middle Burdigalian. The deposits sealing the IEZB are dated by calcareous nannofossils and planktonic foraminifera as late Burdigalian, and comprise clasts from both domains.

Biostratigraphy of the supra-ophiolite sediments of the Troodos Massif, Cyprus: the Cretaceous Perapedhi, Kannaviou, Moni and Kathikas formations

1994 ◽  
Vol 131 (4) ◽  
pp. 499-518 ◽  
Author(s):  
E. Urquhart ◽  
F. T. Banner
Keyword(s):  
Late Cretaceous ◽  
Planktonic Foraminifera ◽  
Time Interval ◽  
Short Time Interval ◽  
Geological History ◽  
Calcareous Nannofossils ◽  
The Matrix ◽  
History Of ◽  
Short Time ◽  
First Time

AbstractThe Troodos Massif of Cyprus exposes a classic and much-studied ophiolite sequence representing oceanic crust of Late Cretaceous age. K-Ar dating of the sheeted dykes and of the overlying pillow lavas gives a range of 83±3 Ma (earliest Campanian) and 75±5 Ma (late Campanian) respectively for the formation of the upper levels of the ophiolite. An autochthonous sequence of Late Cretaceous to Recent age sediments is exposed resting on the ophiolite, the oldest part of which reflects sedimentation in an apparently deep marine, oceanic setting. Little biostratigraphical information is available to constrain the chronostratigraphy of these sediments in relation to the complex geological history of the island, including the uplift and unroofing of the ophiolite, despite their richness in microfauna and flora. This paper provides an integrated biostratigraphical study based on radiolaria, planktonic foraminifera and calcareous nannofossils of the oldest part of the supra-ophiolite succession, of the Cretaceous Perapedhi, Kannaviou, Moni and Kathikas formations. For the first time, well-defined micropalaeontological evidence establishes the relative ages of these formations. The umbers of the Perapedhi formation are no younger than Campanian in age while the volcaniclastic sediments of the Kannaviou formation were also deposited during Campanian times. The matrix of the Moni formation contains a microfauna consistent with the hypothesis that it is derived from the Kannaviou. In contrast, the Kathikas formation is composed of sediment derived mainly from the allochthonous Mamonia complex, but autochthonous pelagic interbed horizons demonstrate that it was deposited probably within a very short time interval during the late Maastrichtian. Key index species are figured, including the first published micrographs of Cretaceous planktonic foraminifera from Cyprus.

Calcareous plankton bio-chronostratigraphy of the Maltese Lower Globigerina Limestone member

2013 ◽  
Vol 63 (1) ◽  
pp. 105-135 ◽  
Author(s):  
Niccolo’ Baldassini ◽  
Roberto Mazzei ◽  
Luca Maria Foresi ◽  
Federica Riforgiato ◽  
Gianfranco Salvatorini
Keyword(s):  
Surface Waters ◽  
Planktonic Foraminifera ◽  
Calcareous Nannofossils ◽  
Calcareous Plankton ◽  
Oxygen Stable Isotope ◽  
Quantitative Analyses ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Cooling Trend ◽  
Coccolithus Pelagicus ◽  
Upper Boundary

Abstract Baldassini, N., Mazzei, R., Foresi L.M., Riforgiato, F. and Salvatorini, G. 2012. Calcareous plankton bio-chronostratigraphy of the Maltese Lower Globigerina Limestone member. Acta Geologica Polonica, 63 (1), 105-135. Warszawa. The planktonic foraminifera and calcareous nannofossil biostratigraphy of the Maltese Lower Globigerina Limestone member has been investigated. The member was dated to early planktonic foraminiferal P22 Zone and nannofossil NP25 Zone (upper Chattian). A climate-stratigraphic approach, based on the quantitative analyses of calcareous nannofossils, was used additionally to achieve a more precise chronology. The species Coccolithus pelagicus (diameter £11 μm) and the genus Umbilicosphaera were selected for the recognition of cold and warm surface waters intervals respectively. The ratio of their percentages enabled the construction of a Climatic Factor (CLF) curve. The CLF values were consistent with a warm climatic phase, which is probably represented by the portion of the oxygen stable isotope curve of Miller et al. above the Oi2c event and below the beginning of the cooling trend that culminates in the Mi1 event. Considering these two climatic events and the upper boundary of the NP25 Zone, it can be inferred that the deposition of the Lower Globigerina Limestone member took place between 25.1 and 24.3 Ma.

Sign in / Sign up

Export Citation Format

Share Document