1-20 OF 42 RESULTS FOR

Nannotetrina

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 2021
EISBN: 978-1-56576-377-7
Image
Photomicrographs of selected calcareous nannofossils identified in the Argille e Calcari Fm. All specimens X1200: 1) Chiasmolithus gigas, crossed nicols. Sample CDP50; 2) Reticulofenestra dictyoda, crossed nicols. Sample CDP46; 3) Pseudotriquetrorhabdulus inversus, crossed nicols. Sample CDP50; 4) Sphenolithus furcatolithoides, crossed nicols. Sample CDP50; 5) Sphenolithus spiniger, crossed nicols. Sample CDP48; 6) Neococcolithes dubius, crossed nicols. Sample CDP48; 7) Discoaster barbadiensis, parallel light. Sample CDP48; 8) Discoaster saipanensis, parallel light. Sample CDP48; 9) Chiasmolithus grandis, parallel light. Sample CDP51; 10) Nannotetrina cristata, parallel light. Sample CDP48; 11) Nannotetrina alata, parallel light. Sample CDP46; 12) Nannotetrina pappii, parallel light. Sample CDP48.
Published: 01 June 2015
. Sample CDP48; 9) Chiasmolithus grandis , parallel light. Sample CDP51; 10) Nannotetrina cristata , parallel light. Sample CDP48; 11) Nannotetrina alata , parallel light. Sample CDP46; 12) Nannotetrina pappii , parallel light. Sample CDP48.
Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 January 2014
GeoArabia (2014) 19 (1): 117–140.
..., Discoaster sublodoensis, Nannotetrina quadrata, Reticulofenestra umbilicus and Chiasmolithus solitus , indicate an Early to Middle Eocene age, while the presence of Maastrichtian and Paleocene forms suggests major reworking. The presence of Cretaceous taxa reflects either subaerial erosive input from...
FIGURES | View All (18)
Journal Article
Published: 01 September 2011
Journal of Micropalaeontology (2011) 30 (2): 129–139.
... . NP14 . The Discoaster sublodoensis Zone is 85 m thick in the Nizzana Formation. The base of this zone is the FO of Discoaster sublodoensis . The top underlies the FO of Nannotetrina fulgens . The FO of Blackites inflatus marks the base of the NP14b subzone. Many inflated and curved-spine...
FIGURES | View All (5)
Journal Article
Published: 01 June 2015
Italian Journal of Geosciences (2015) 134 (2): 200–218.
.... Sample CDP48; 9) Chiasmolithus grandis , parallel light. Sample CDP51; 10) Nannotetrina cristata , parallel light. Sample CDP48; 11) Nannotetrina alata , parallel light. Sample CDP46; 12) Nannotetrina pappii , parallel light. Sample CDP48. ...
FIGURES | View All (15)
Journal Article
Published: 01 January 2007
Micropaleontology (2007) 53 (1-2): 127–144.
... of T. orthostylus may range higher than previously indicated. In Arroyo El Bulito section, California, Bukry (1973b) mentioned that the stratigraphic range of T. orthostylus is high as the middle Eocene Nannotetrina quadrata (= N. fulgens) Zone as several zones present above its presumed level...
FIGURES | View All (9)
Journal Article
Published: 01 June 2017
Italian Journal of Geosciences (2017) 136 (2): 171–185.
... Miocene assemblages (Tabs. 3-9), H. paleocarteri only occurs in late Chattian-Aquitanian assemblages ( Figs. 9 - 10 ; Tab. 3). Nannotetrina is present in the Mt. Cisa, Mt. Modino and Costalta sections, where N. cristata ( Fig. 10 ) and N. fulgens ( Figs. 5 and 7 ) were also recognized...
FIGURES | View All (16)
Image
Microphotographs of selected calcareous nannofossil species from the Mt. Modino Unit succession. Scale bar 5μm. Photographs are in XPL unless otherwise noted.
Published: 01 June 2017
. Cribrocentrum reticulatum . Sample TMM45. 11. Nannotetrina cristata . Sample TMM1. 12. Helicosphaera euphratis . Sample TMM19. 13. Sphenolithus calyculus . Sample TMM73. 14. Sphenolithus ciperoensis . Sample TMM69. 15. Sphenolithus radians . Sample TMM1. 16. Sphenolithus delphix . Sample TMM12. 17
Image
Fig. 8
Published: 01 June 2009
, Monte Melino Sect.; (b) Helicosphaera ampliaperta XP, San Mariano Sect.; (c) Dictyococcites bisectus XP, Capanne 2 Sect.; (d) Nannotetrina sp. NL, Cava Casilini Sect.; (e) Tribrachiathus orthostylus NL, Cava Casilini Sect.; (f) Helicosphaera euphratis XP, Passignano E Sect.; (g) Helicosphaera
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 2021
DOI: 10.2110/sepmcsp.14.175
EISBN: 978-1-56576-377-7
... .: Chiasmolithus ; D. : Discoaster [ Heliodiscoaster herein]; N .: Nannotetrina . TEXT-FIGURE 46 Stratigraphic range of selected species in the Gorrondaxte section around the Ypresian/Lutetian boundary. Zones are from (a): Okada and Bukry, 1980; (b): Martini, 1971a. Dotted lines: very rare...
FIGURES | View All (69)
Journal Article
Journal: Geology
Published: 01 January 2010
Geology (2010) 38 (1): 23–26.
... to be consistent with the first occurrence (FO) of Hantkenina (see Molina et al., 2006 , for a review). This is in contrast to the results of Toumarkine and Bolli (1975) and Proto-Decima et al. (1975) from the Possagno section, where the FO of Hantkenina was found in the Nannotetrina fulgens Zone...
FIGURES | View All (5)
Journal Article
Published: 01 September 1986
Journal of the Geological Society (1986) 143 (5): 729–735.
... of the Lutetian (Abrard s Lutetian I) in its type area, belongs to Zone NP14 (upper part). The first Nannotetrina fulgens, the appearance of which species marks the base of Zone NP15, occurs a few metres above the base of the Lutetian (in Abrard s Lutetian 11). Thus, it is the uppermost part of Zone NP14 which...
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 2021
DOI: 10.2110/sepmcsp.14.433
EISBN: 978-1-56576-377-7
........................................................................................ Appendix C IIb1. Essentially tetra-radial symmetry (tertinaliths.................................................... Nannotetrina IIb2. Hexaradial symmetry................................................................................. Appendix D 2a. rim non scalloped (catinaliths...
Journal Article
Published: 01 June 2009
Italian Journal of Geosciences (2009) 128 (2): 341–352.
..., Monte Melino Sect.; (b) Helicosphaera ampliaperta XP, San Mariano Sect.; (c) Dictyococcites bisectus XP, Capanne 2 Sect.; (d) Nannotetrina sp. NL, Cava Casilini Sect.; (e) Tribrachiathus orthostylus NL, Cava Casilini Sect.; (f) Helicosphaera euphratis XP, Passignano E Sect.; (g) Helicosphaera...
FIGURES | View All (12)
Journal Article
Journal: GSA Bulletin
Published: 06 September 2017
GSA Bulletin (2018) 130 (1-2): 193–207.
..., detrital magnetite. The genus Nannotetrina included only Nannotetrina cristata , which was present from the base up to 40.0 msl. The calcareous nannofossils are common to abundant and show good preservation in almost all the samples. The time interval studied would span the middle Eocene...
FIGURES | View All (8)
Journal Article
Journal: GSA Bulletin
Published: 01 September 2022
GSA Bulletin (2023) 135 (5-6): 1280–1296.
..., top, and top common, respectively. GPTS12—Geomagnetic Polarity Time Scale 2012 ( Gradstein et al., 2012 ). TABLE 2. NANNOFOSSIL-BASED DATUMS USED AS AGE-DEPTH TIE POINTS FOR THE MIDDLE EOCENE BELAYA RIVER SECTION IN THIS STUDY According to Backman (1987), the top of Nannotetrina...
FIGURES | View All (6)
Journal Article
Journal: GSA Bulletin
Published: 01 March 2007
GSA Bulletin (2007) 119 (3-4): 413–427.
... 119 m, we define its first common occurrence (FCO) at 122 m, together with the LO of Nannotetrina spp. (Fig. 9) . A discrepancy between this identification and that of Monechi and Thierstein (1985) is due to the different taxonomic concept of R. umbilica size >12.5 µm in Monechi...
FIGURES | View All (10)
Journal Article
Published: 01 April 2014
Russ. Geol. Geophys. (2014) 55 (4): 483–494.
...). The Charlesdowniea coleothrypta s.l. Zone, traced in the Nyurol’ka Formation, is divided into two subzones. By nanoplankton, this zone corresponds to the Marthasterites tribrachiatus, Discoaster lodoensis, D. sublodoensis Zone and, partly, to the Nannotetrina fulgens Zone (upper Ypresian–Lutetian...
FIGURES | View All (4)
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 2021
DOI: 10.2110/sepmcsp.14.345
EISBN: 978-1-56576-377-7
... sp. B [= Discoaster sp. 1 Perch-Nielsen, 1971b, p. 65, pl. 52, fig. 9] Heliodiscoaster sp. C [= Discoaster binodosus Perch-Nielsen et al., 1978] Genus Nannotetrina Achuthan & Stradner 1969 emend. Aubry 2015a, p. 345 Type Species: Nannotetrina fulgens (Stradner) Achuthan...
Journal Article
Published: 01 April 2014
Journal of Foraminiferal Research (2014) 44 (2): 187–201.
... between planktic foraminferal and calcareous nannofossil zones. The relative position of the calcareous nannofossils and planktic foraminiferal horizons characterizing Zone NP15a (B of Nannotetrina fulgens ), Bc of G. nuttalli (possible base of Zone E8, see considerations above) and Zone NP15b (B...
FIGURES | View All (5)