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27 results for “Calcareous nannofossil”
Fig. 5 in Biostratigraphy (Calcareous Nannofossils And Molluscs) Of The Pannonian Deposits From Transylvania, Romania (Guşteriţa Quarry - Sibiu)
Fig. 5 The molluscs species of the Guşteriţa quarry. Scale bar 1cm. a Congeria banatica R. Hoernes, 1875; b Congeria banatica - monospecific assemblage; c Lymnocardium cf. promultistriatum Jekelius, 1944; d-e Paradacna lenzi (R. Hoernes, 1874); f Paradacna syrmiense (R. Hoernes, 1874); g-h Gyraulus tenuistriatus (Gorjanović-Kramberger, 1899); i Gyraulus ponticus (Lörenthey, 1893); j-k Undulotheca halavatsi Gorjanović-Kramberger, 1901.
Fig. 3 in Biostratigraphy (Calcareous Nannofossils And Molluscs) Of The Pannonian Deposits From Transylvania, Romania (Guşteriţa Quarry - Sibiu)
Fig. 3 Calcareous nannofossils from Guşteriţa quarry: a - f Isolithus semenenko Lyulieva, 1989; g - i Isolithus pavelici Ćorić & Vrsaljko; j, k Pontosphaera multipora (Kamptner, 1948 ex Deflandre in Deflandre & Fert, 1954) Roth, 1970; l Helicosphaera carteri (Wallich 1877) Kamptner, 1954; m Helicosphaera wallichii (Lohmann 1902) Okada & McIntyre, 1977; n, o Helicosphaera walbersdorfensis Müller, 1974; p Noelaerhabdus sp.; q Ascidian spicule; r, s Cyclicargolithus floridanus (Roth & Hay, in Hay et al., 1967) Bukry, 1971.; t Calcidiscus leptoporus (Murray & Blackman 1898) Loeblich & Tappan, 1978.
Fig. 4 in Biostratigraphy (Calcareous Nannofossils And Molluscs) Of The Pannonian Deposits From Transylvania, Romania (Guşteriţa Quarry - Sibiu)
Fig. 4 Calcareous nannofossils from Guşteriţa quarry: a Reticulofenestra pseudoumbilicus (Gartner, 1967) Gartner, 1969; b Coccolithus pelagicus (Wallich 1877) Schiller, 1930; c Calcidiscus leptoporus (Murray & Blackman 1898) Loeblich & Tappan, 1978; d Sphenolithus moriformis (Brönnimann & Stradner, 1960) Bramlette & Wilcoxon, 1967; e Sphenolithus heteromorphus Deflandre 1953; f. Rhabdosphaera pannonica Baldi-Beke, 1960; g Calciosolenia murrayi Gran, 1912 and Discoaster variabilis Martini and Bramlette, 1963; h Pannonian calcareous nannofossils assemblages with Isolithus pavelici and I. semenenko; Discoaster cf. variabilis.; i Candona sp. Baird, 1845 right valve; j Candona sp. Baird, 1845 right valve; k fragment of Candona sp.
Fig. 5 in Upper Burdigalian-Middle Sarmatian Calcareous Nannofossils From Totea-Văleni Area (Getic Depression, Romania)
Fig. 5 Upper Badenian-Bessarabian calcareous nannofossils: a Braarudosphaera bigelowii (Gran & Braarud) Deflandre (TO-1 borehole); b Calcidiscus macintyrei (Bukry & Bramlette) Loeblich & Tappan (TO-1 borehole); c Catinaster coalitus Martini & Bramlette (VA-1 borehole); d, e Discoaster exilis Martini & Bramlette (TO-1 borehole); f Discoaster musicus Stradner (TO-1 borehole); g Helicosphaera carteri (Wallich) Kamptner (TO-1 borehole); h Helicosphaera walberdorfensis Mueller (TO-1 borehole); i Reticulofenestra minuta Roth (TO-1 borehole); j Reticulofenestra perplexa (Burns) Wise (VA-1 borehole); k, l Sphenolithus abies Deflandre (VA-1 borehole); m Syracosphaera pulchra Lohmann (TO-1 borehole); n Noelaerhabdus bozinovicae tegulatus Bona & Gal (VA-1 borehole); o, p Isolithus semenenko Luľjeva (o – VA-1 borehole, p – RA-1 borehole).
Fig. 3 in Upper Burdigalian-Middle Sarmatian Calcareous Nannofossils From Totea-Văleni Area (Getic Depression, Romania)
Fig. 3 Upper Burdigalian calcareous nannofossils: a, b Calcidiscus leptoporus (Murray & Bramlette) Loeblich & Tappan (VA-1 borehole; a – N+ with ʎ compensator, b – NII with ʎ compensator); c Calcidiscus macintyrei (Bukry & Bramlette) Loeblich & Tappan (CO-1 borehole, N+); d Coccolithus miopelagicus Bukry (TO-2 borehole, NII); e Cyclicargolithus floridanus (Roth & Hay) Bukry (TO-2 borehole, NII); f, g Helicosphaera ampliaperta Bramlette & Wilcoxon (TO-1 borehole, f – N+, 7 – gNII); h Helicosphaera intermedia Martini (CO-1 borehole, N+); i, j Pontosphaera multipora (Kamptner) Roth (TO-3 borehole, i – N+, j – N+ with ʎ compensator); k, l Sphenolithusheteromorphus Deflandre (TO-3 borehole, k – N+,0o, l – N+, 45o).
Fig. 4 in Upper Burdigalian-Middle Sarmatian Calcareous Nannofossils From Totea-Văleni Area (Getic Depression, Romania)
Fig. 4 Lower to middle Badenian calcareous nannofossils: a Discoaster variabilis Martini & Bramlette (TO-2 borehole, NII); b Helicosphaera wallichii (Lohmann) Boudreaux & Hay (TO-2 borehole, N+); c, d Sphenolithus heteromorphus Deflandre (RA-1 borehole, c – N+, 0o, d – N+, 45o); e, f Pontosphaera discopora Schiller (RA-1 borehole, e – N+, f – NII), g Reticulofenestra haqii Backman (CO-1 borehole, N+); h Reticulofenestra pseudoumbilicus (Gartner) Gartner (CO-1 borehole, N+); i Umbilicosphaera jafari Müller (TO-2 borehole, NII); j Umbilicosphaera rotula (Kamptner) Varol (TO-2 borehole, NII).
Fig. 2 in Upper Burdigalian-Middle Sarmatian Calcareous Nannofossils From Totea-Văleni Area (Getic Depression, Romania)
Fig. 2 Lithology and biostratigraphy of the upper Burdigalian-middle Sarmatian deposits of the Totea - Colțești - Rădinești - Văleni area.
Fig. 1 a in Upper Burdigalian-Middle Sarmatian Calcareous Nannofossils From Totea-Văleni Area (Getic Depression, Romania)
Fig. 1 a Geological Map of Romania, scale 1: 1,000,000. Printed by the Geological Institute of Romania (1978), showing the location of the investigated area; b Location of the studied drillings on the scale 1:200,000 Pitești Sheet (Mihăilă et al., 1967) of the Geological Map of Romania, printed by the Geological Institute of Romania.
Fig. 4 in Uppermost Cretaceous Calcareous Nannofossils In Red Pelagic Sediments (Romanian Carpathians)
Fig. 4 Positions of sections in the Romanian Carpathian bend region, i.e., between the Dâmbovița, Ialomița and Prahova river basins, where red beds of the Gura Beliei Formation occur (www.googlemaps).
Fig. 3 in Uppermost Cretaceous Calcareous Nannofossils In Red Pelagic Sediments (Romanian Carpathians)
Fig. 3 Photographs of the exposed sediments in the Pucheni section. a variegated marlstones and claystones of the Plaiu Formation; b red marlstones and claystones of the Gura Beliei Formation; c the shaly turbidites of the Pucheni Formation (top of the studied section).
Fig. 6 in Biozonation And Correlation Of Two Wells In Niger Delta Using Calcareous Nannofossils
Fig. 6 Correlation of the MAY-01 and MAY-02 wells based on calcareous nannofossil zones, MFS and SB.
Fig. 2 in Biozonation And Correlation Of Two Wells In Niger Delta Using Calcareous Nannofossils
Fig. 2 Stratigraphy and paleoenvironment of the Eocene-Pliocene interval of the Niger Delta (modified from Doust & Omatsola, 1990)
Calcareous nannofossil size and abundance response to the Messinian Salinity Crisis onset and paleoenvironmental dynamics
<p>The file contains calcareous nannofossils (<em>Helicosphaera carteri, Sphenolithus abies, Umbilicosphaera rotula, Coccolithus pelagicus, Reticulofenestra minuta</em>) biometry data collected in the Messinian Perales section (Sorbas Basin, Spain) and in the Banengo and Pollenzo sections (Piedmont Basin, Italy)</p>
Late Miocene to Pliocene calcareous nannofossil assemblage records and paleotemperature gradients from the NW Australian shelf (IODP Sites U1463, U1464)
<p>IODP Expedition 356 drilled on the northwestern (NW) Australian shelf, recovering Miocene-Pleistocene sediments in an area where climate archives are scarce. In this work we investigated cores from two sites that are situated in two adjacent basins (IODP Site U1463 and U1464). Our analysis includes astronomically tuned records of relative abundance (%) and accumulation rates (N/cm<sup>2</sup> kyr) of the most common calcareous nannofossil species, estimates of the Shannon diversity index, as well as a ratio between dominant taxonomic groups termed the nannofossil stratification index (NSI) . Additionally, paleotemperature gradients between the NW Australian shelf area and the eastern Indian Ocean were calculated from previously published records. All the above records were used to reconstruct regional ocean circulation patterns, the relative intensity of seasonally flowing boundary currents, as well as changes in paleoproductivity and species dominance in the area between 6-3.5 million years ago (Ma).</p>
Fig. 1 Simplified geological map 1 in Biostratigraphy (Calcareous Nannofossils And Molluscs) Of The Pannonian Deposits From Transylvania, Romania (Guşteriţa Quarry - Sibiu)
Fig. 1 Simplified geological map 1:200.000 after Dessila Codarcea et al., 1968.
Fig. 2 in Biostratigraphy (Calcareous Nannofossils And Molluscs) Of The Pannonian Deposits From Transylvania, Romania (Guşteriţa Quarry - Sibiu)
Fig. 2 Guşteriţa quarry – A, B, and C sections.
Fig. 1 in Biozonation And Correlation Of Two Wells In Niger Delta Using Calcareous Nannofossils
Fig. 1 Geologic map of the Niger Delta region (after Correldor et al. 2005)
"Microfossil evidence for trophic changes during the Eocene–Oligocene transition in the South Atlantic (ODP Site 1263, Walvis Ridge)" - calcareous nannofossil census data
<p>This is a data supplement (<strong>Dataset A</strong>) to the paper "Microfossil evidence for trophic changes during the Eocene–Oligocene transition in the South Atlantic (ODP Site 1263, Walvis Ridge)" by Bordiga et al., 2015a (https://doi:10.5194/cp-11-1249-2015). Note that data are tabulated against depth in core (meters composite depth, mcd). Please refer to <strong>Table 1</strong> in Bordiga et al. (2015) for age-depth model.</p> <p><strong>Dataset A</strong>. Calcareous nannofossil census data (ODP Site 1263)</p> <p>One file (ODP 1263 dataset A_Bordiga et al. 2015.xls) containing:<br> Sample information; Raw counts, relative (%) and absolute abundances (N/ g) of all species and size-based groups detected (as illustrated in Figure S2 of the original publication).</p>
"Shifts in Phytoplankton Composition and Stepwise Climate Change during the Middle Miocene" - Age-depth models and calcareous nannofossil census data
<p>This is a data supplement to the paper "Shifts in Phytoplankton Composition and Stepwise Climate Change during the Middle Miocene" (Paleoceanography and Paleoclimatology).</p> <p><strong>Data Set S1</strong>. Age-depth models.</p> <p>This data set includes the file SI_Tables S2-S5_Henderiks_etal.xlsx containing raw age-depth tie point compilations for each site and sample age estimates, as well as the final, site-specific input files and output (age assignments) from the <em>Undatable </em>Matlab software Version 1.1 (Lougheed and Obrochta, 2019; https://doi.org/10.1029/2018PA003457). The age-depth models presented in this study can be reproduced by running the age-depth model input files in the <em>Undatable</em> graphical user interface (GUI), whereby the necessary settings for the specific number of Monte Carlo iterations, xfactor and bootstrapping are contained in the header of the input files. Note that input and output files are grouped in two zipped folders: a cm- and meter-depth scale version (the latter decreases computing time and produced the age-depth plots shown in Figures S1 and S2 of the paper).</p> <p><strong>Data Set S2</strong>. Calcareous nannofossil census data.</p> <p>The file SI_ds02_Henderiks_etal.xlsx consists of two separate data sheets:<br> 1. Middle Miocene nannofossil abundance estimates (N/g) and genus-level census counts (%, ±95% CI) at 5 different Atlantic deep-sea sites (Sites 982, 608, 925, 926 and 1264).<br> 2. Middle Miocene census counts (%, ±95% CI) of <em>Coccolithus</em> and <em>Reticulofenestra</em> morphospecies and size categories for Sites 982, 608, 925 and 926.</p>
Fig. 5 in Uppermost Cretaceous Calcareous Nannofossils In Red Pelagic Sediments (Romanian Carpathians)
Fig. 5 The areal occurrence of CORBs belonging to the Gura Beliei Formation, as post-tectonic cover of the Outer Dacides and Moldavides nappes. Geological map modified after Săndulescu et al. (1981) and Săndulescu (1984).
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