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Schizosphaerella

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Nannofossil abundance (quantity of coccoliths and  <span class="search-highlight">Schizosphaerella</span>  per fi...
Published: 01 July 2004
Fig. 2.  Nannofossil abundance (quantity of coccoliths and Schizosphaerella per field of view in the slide) and dinoflagellate cyst percentage decrease at the base of the C. superbus nannofossil Zone of the Pozzale section. Sphaeromorphs and Tasmanites dominate the palynofacies. In the same
Series: Geological Society, London, Special Publications
Published: 03 November 2021
DOI: 10.1144/SP514-2021-19
EISBN: 9781786209993
...-isotope excursion, along with high amounts of taxa indicative of nutrient-rich environments (Biscutaceae). Such conditions attest to high productivity. Fluxes show the lowest values in the core of the event, along with a size decrease of Schizosphaerella and a peak in Calyculaceae. The recovery...
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Middle to Upper Jurassic calcareous nannofossils from core samples in onsho...
Published: 01 October 2015
-Dhruma Transition; (2) Schizosphaerella punctulata , XPL, Well B, 14,330.75 ft, Dhruma Formation; (3) Schizosphaerella punctulata , XPL, Well B, 14,386.90 ft, Dhruma Formation; (4) Schizosphaerella punctulata , XPL, Well B, 14,358.50 ft, Dhruma Formation; (5) Schizosphaerella punctulata
Journal Article
Published: 01 May 2015
Russ. Geol. Geophys. (2015) 56 (5): 737–744.
... and Zweili, L. sigillatus (Stradner) Prins, Zeugrhabdotus erectus (Deflandre) Reinhardt, Schizosphaerella punctulata Deflandre and Dangeard, Biscutum dubium (Noël) Grün, Polypodorhabdus escaigii Noël, Anfractus harrisonii Medd, Stephanolithion speciosum Deflandre speciosum...
FIGURES
Journal Article
Journal: Paleobiology
Published: 24 April 2015
Paleobiology (2015) 41 (3): 415–435.
... Copyright © 2015 The Paleontological Society. All rights reserved. 2015 The Paleontological Society. All rights reserved. Figure 2 Calcareous nannofossils photographs from Cabo-Mondego (CM) and Chaudon-Norante (CN) under cross-polarized light. 1. Schizosphaerella sp. CM67; 2...
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Series: Geological Society, London, Special Publications
Published: 03 November 2021
DOI: 10.1144/SP514-2020-256
EISBN: 9781786209993
... by an extinction event. The results were introduced within a principal component analysis and compared with the stable isotope and total organic carbon curves. During the latest Pliensbachian, the Mirabile and the lowermost part of the Semicelatum Ammonite Subzones, Schizosphaerella , Bussonius prinsii...
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Journal Article
Published: 01 September 2005
Bulletin de la Société Géologique de France (2005) 176 (5): 457–466.
... in the lower part of the section (fig. 3 ). The nannofossil assemblages were composed of dominant coccolithophorids and of Schizosphaerella spp. ( incertae sedis ). A total of 16 species was identified and the composition showed great variations. Nannofloral species richness, diversity and evenness have...
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Journal Article
Published: 01 July 2004
Journal of the Geological Society (2004) 161 (4): 685–693.
...Fig. 2.  Nannofossil abundance (quantity of coccoliths and Schizosphaerella per field of view in the slide) and dinoflagellate cyst percentage decrease at the base of the C. superbus nannofossil Zone of the Pozzale section. Sphaeromorphs and Tasmanites dominate the palynofacies. In the same...
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Journal Article
Journal: Geology
Published: 13 August 2020
Geology (2020) 48 (12): 1184–1188.
... aragonite and Ω calcite declined to the lowest levels during the late Polymorphum Zone and early Levisoni Zone (Fig. S4). Although a comparison of the δ 11 B signal to the high-resolution CaCO 3 and Schizosphaerella records is complicated by disparate temporal resolutions of the data sets...
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Multiproxy record across the Pliensbachian-Toarcian boundary (ammonite zone...
Published: 13 August 2020
Pliensbachian pH Neritan model of Ridgwell (2005) . Plot is truncated at pH value 7 due to fact that some values fell below effective range of pH calibrations. NIST951—Boric acid isotopic standard. (D) Size of calcareous nannofossil Schizosphaerella (light blue) and bulk rock CaCO 3 content (dark blue
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The Cabo Mondego section showing the δ 13 C (Suchéras-Marx et al.  2012 ), ...
Published: 24 April 2015
Figure 3 The Cabo Mondego section showing the δ 13 C (Suchéras-Marx et al. 2012 ), nannofossil absolute abundance (gray), and nannofossil flux (black) based on time estimation of early Bajocian ammonite zones (Suchéras-Marx et al. 2013 ); Schizosphaerella spp
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Scanning electron microscope and light microscope (LM) images of nannofossi...
Published: 06 February 2019
Plate 1. Scanning electron microscope and light microscope (LM) images of nannofossils from the Tofino section in Italy. Images 1 and 3—encrusted Schizosphaerella puctulata (Deflandre and Dangeard, 1938), sample 188. Images 2 and 4—inner mold of S. punctulata , sample 178. Image 5— Mitrolithus
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 October 2015
GeoArabia (2015) 20 (4): 125–180.
...-Dhruma Transition; (2) Schizosphaerella punctulata , XPL, Well B, 14,330.75 ft, Dhruma Formation; (3) Schizosphaerella punctulata , XPL, Well B, 14,386.90 ft, Dhruma Formation; (4) Schizosphaerella punctulata , XPL, Well B, 14,358.50 ft, Dhruma Formation; (5) Schizosphaerella punctulata...
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Calcareous nannofossils photographs from Cabo-Mondego (CM) and Chaudon-Nora...
Published: 24 April 2015
Figure 2 Calcareous nannofossils photographs from Cabo-Mondego (CM) and Chaudon-Norante (CN) under cross-polarized light. 1. Schizosphaerella sp. CM67; 2. Biscutum dubium CM26; 3. Similiscutum precarium CM17; 4. Biscutum depravatum CM62; 5. Discorhabdus
Journal Article
Journal: GSA Bulletin
Published: 06 February 2019
GSA Bulletin (2019) 131 (7-8): 1255–1275.
...Plate 1. Scanning electron microscope and light microscope (LM) images of nannofossils from the Tofino section in Italy. Images 1 and 3—encrusted Schizosphaerella puctulata (Deflandre and Dangeard, 1938), sample 188. Images 2 and 4—inner mold of S. punctulata , sample 178. Image 5— Mitrolithus...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 April 2013
GeoArabia (2013) 18 (2): 215–219.
...) was recognized in this formation that suggests a correlation with the Bajocian. The upper NJ10 assemblages are characterized by the presence of L. crucicentralis, W. contractu and W. britannica , while the lower NJ10 assemblages are marked by the abundance of Schizosphaerella punctulata with D. criotus...
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(a) Photomicrograph of dark marl thin-section (plane polarized light, width...
Published: 30 January 2017
BL120 and fig. 2.4F of Weedon ( 1987 a ) , bed 32a, Bucklandi Zone, Lyme Regis. (d) SEM photograph showing an aggregate of coccoliths next to Schizosphaerella punctulata (centre) both surrounded by a matrix of organic matter, clay and calcite microspar (width of view 53 μm). Laminated shale sample
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Calcareous nannoplankton in the Jurassic sediments of the Dobrudja foredeep...
Published: 01 May 2015
, Watznaueria manivitiae Bukry, Western region; Fig. 34, Cyclagelosphaera margerelii Noël, Western region; Fig. 35, Schizosphaerella punctulata Deflandre and Dangeard, Central region.
Journal Article
Published: 22 February 2011
Geological Magazine (2011) 148 (4): 619–631.
... the lower to middle part of the Kastelli Pelites for a thickness of about 20 m. Twelve samples were barren of nannofossils, and the rest contained very few specimens. The assemblage is represented by rare Schizosphaerella spp., Mitrolithus jansae and M. elegans , Calyculus spp., Similiscutum...
Journal Article
Published: 01 November 2009
Proceedings of the Yorkshire Geological Society (2009) 57 (3-4): 133–142.
...). Unfortunately, the sample yielded only a single identifiable specimen, referable to the genus Schizosphaerella spp. (incertae sedis), which has a range from Hettangian to Kimmeridgian and thus brings no precision to the age of the specimen (G. Suan, pers. comm.). It is noteworthy that nannofossils are usually...
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