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441 results for “Maastrichtian”
Fig. 6 in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 6 Type of sections of Russoella radoiciciae (from Barattolo, 1987, modified). E, equatorial; A, axial; Tr, transversal; Oc, oblique centered; Onc, oblique not centered; Tes, tangential external symmetrical; Tis, tangential internal symmetrical; Tia, tangential internal asymmetrical.
Fig. 4 Russoella parthica n in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 4 Russoella parthica n. sp., middle-late Maastrichtian, Balkh province (N Afghanistan), sample S4 (= BA.4250); a-e drawing of specimens in various sections.
Fig. 3 Microfacies from the Kholm series. a in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 3 Microfacies from the Kholm series. a Foraminiferal packstone (Siderolites calcitrapoides, Praesiderolites vidali, Orbitoides spp., rotaliids), sample BA.4258, Maastrichtian; b Bryozoan packstone, sample BA.4266 Maastrichtian; c Bryozoan packstone, sample BA.4267, Maastrichtian; d Foraminiferal packstone (Miscellanea sp., echinoid fragments), sample BA.4285, Paleocene (probably Selandian). Scale bar = 1 mm.
Fig. 9 in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 9 Terquemella globularis Elliott, early Maastrichtian (W Afghanistan), Balkh province (N Afghanistan), sample T13 (= BA.4244); a-b drawing of specimens in various sections.
Fig. 8 in Dasycladalean Fossil Green Algae From The Maastrichtian-Paleocene Of Balkh Province (N Afghanistan)
Fig. 8 Terquemella sp., middle-late Maastrichtian, Balkh province (N Afghanistan), sample S4 (= BA.4250); a-c drawing of specimens in various sections.
Fig. 5 in Suraqalatia Brasieri Görmuş, Lawa & Nuaimy, 2017 (Larger Benthic Foraminifera; Suraqalatiidae N. Fam.) From The Late Maastrichtian Of The Tarbur Formation (Zagros Fold-Thrust-Belt) And Remarks On Dicyclina Munier-Chalmas, 1887
Fig. 5 Suraqalatia brasieri Görmüş, Lawa & Al Nuaimy, upper Maastrichtian Tarbur Formation of Mandegan section. Detailed view showing wall structure and exoskeleton (subepideremal network). Abbreviations: b = beam, ep = epiderm, f = foramen, s = septum. Thin-section Rt 63.
Fig. 4 in Suraqalatia Brasieri Görmuş, Lawa & Nuaimy, 2017 (Larger Benthic Foraminifera; Suraqalatiidae N. Fam.) From The Late Maastrichtian Of The Tarbur Formation (Zagros Fold-Thrust-Belt) And Remarks On Dicyclina Munier-Chalmas, 1887
Fig. 4 Suraqalatia brasieri Görmüş, Lawa & Al Nuaimy, upper Maastrichtian Tarbur Formation of Mandegan (a, e) and Naghan sections (b–d, f); oblique, partly tangential sections. Abbreviations: D = Dicyclina, L = Loftusia, N = Neobalkhania, O = Omphalocyclus. Scale bars = 1 mm. Thin-sections: Rt 63 (a), 2NG 183 (b), Rt 36 (c), 2NG 146 (d), 2NG 169 (f).
Fig. 2 in Suraqalatia Brasieri Görmuş, Lawa & Nuaimy, 2017 (Larger Benthic Foraminifera; Suraqalatiidae N. Fam.) From The Late Maastrichtian Of The Tarbur Formation (Zagros Fold-Thrust-Belt) And Remarks On Dicyclina Munier-Chalmas, 1887
Fig. 2 Distribution (total vertical range) of Suraqalatia brasieri Görmüş, Lawa & Al Nuaimy and some other larger benthic foraminifera in the Tarbur Formation of the Mandegan section.
Fig. 7 Persiacyclammina maastrichtiana n. gen., n in Persiacyclammina Maastrichtiana N. Gen., N. Sp., A New Larger Benthic Foraminifer From The Maastrichtian Of Iran
Fig. 7 Persiacyclammina maastrichtiana n. gen., n. sp., upper Maastrichtian Tarbur Formation of the Naghan section, Zagros Zone, SW Iran. a, Oblique equatorial section. b–c, m, q, Oblique sections. d, j, Oblique axial sections. e–f, l, o, Subaxial sections. g–i, k, Axial sections. n, p, Longitudinal sections. Abbreviations: r.n. = reticulate network, s.s. = subepidermal septulum. Thin-sections: 2NG 81-4 (a, f), 2NG 81-1 (b), NG 84 (c), 2NG 85-2 (d), 2NG 81 (e), 2NG 81-2 (g, q), 2NG 71 (h, m), 2NG 64 (I), 2NG 76 (k), 2NG 86 (l), 2NG 97 (n), NG 121 (o), 2NG 138 (p).
Fig. 7 Zagrosella rigaudii n.gen., n in Zagrosella Rigaudii N. Gen., N. Sp., A New Biokovinoidean Foraminifer From The Maastrichtian Of Iran
Fig. 7 Zagrosella rigaudii n.gen., n.sp., upper Maastrichtian Tarbur Formation of the Naghan section (except i from the Mandegan section), Zagros Zone, SW Iran. a–b, Axial sections. c, Slightly oblique subaxial section. d, Subaxial section. e–l, Oblique sections. Abbreviations: f = foramen, pi = pillar, t = structures interpreted as cryptoendolithic thaumatoporellaceans. Thin-sections: 2NG 60-1 (a), NG 85 (b), 2NG 94 (C), 2NG 15 (d), 2NG 27 (e), 2NG 83 (f), 2NG 39 (g), NG 94 (h), Rt 67-3 (i), NG 90 (j), NG 86 (k), 2NG 85 (l).
Fig. 5 Persiacyclammina maastrichtiana n. gen., n in Persiacyclammina Maastrichtiana N. Gen., N. Sp., A New Larger Benthic Foraminifer From The Maastrichtian Of Iran
Fig. 5 Persiacyclammina maastrichtiana n. gen., n. sp., upper Maastrichtian Tarbur Formation of the Naghan section, Zagros Zone, SW Iran. a, centered axial section. c–h, variously cut oblique sections. b, i, tangential sections. Abbreviation: r.n. = reticulate network. Thin-sections: NG 65 (a), NG 81 (b, h), NG 83-3 (c), NG 88 (d), 2NG 81 (e, g), NG 120 (f).
Fig. 9 in On The Occurrence Of Salpingoporella Pasmanica Radoičić, 2002, (Dasycladales) From The Late Maastrichtian Of The Zagros Zone, Sw Iran
Fig. 9 Some biostratigraphic importance larger benthic foraminifera from the Maastrichtian Tarbur Formation of the Mandegan section. a Omphalocyclus macroporus (Lamarck), thin-section RT 65. b-c Neobalkhania bignoti Cherchi, Radoičić & Schroeder, thin-sections Rt 79-2, SNSB-BSPG 2016 III-6 (Rt 79). d Orbitoides media d´Archiac, thinsection RT 30. e Gyroconulina columellifera Schroeder & Darmoian, thin-section Rt 113. f Loftusia sp., thin-section Rt 113. g Siderolites cf. calcitrapoides Lamarck, thin-section Rt 36. Scale bars = 1.0 mm, except b-c, e = 0.5 mm.
Fig. 7 in On The Occurrence Of Salpingoporella Pasmanica Radoičić, 2002, (Dasycladales) From The Late Maastrichtian Of The Zagros Zone, Sw Iran
Fig. 7 Schematic distribution of larger benthic foraminifera in the Eocene Trentinara Formation of Italy (based on Vecchio and Hottinger, 2007, fig. 5), and the Maastrichtian Tarbur Formation (examples; without scale). 1 Rotaliids (e.g., Rotorbinella), 2 Siderolites, 3 Orbitoides, 4 Loftusia, 5-6 Orbitolinidae (5: Dictyoconella minima), 7 Gyroconulina, 8 Rhapydionidae, 9 Spirolina, 10 Pyrgo?, 11 Broeckina. 5-7: Agglutinated conical foraminifera, 8-11: Porcelaneous foraminifera. Note the basinal facies corresponds to the Gurpi Formation.
Fig. 3 in Zagrosella Rigaudii N. Gen., N. Sp., A New Biokovinoidean Foraminifer From The Maastrichtian Of Iran
Fig. 3 Typical microfacies of samples with Zagrosella rigaudii n.gen., n.sp. (Z), from the upper Maastrichtian Tarbur Formation of the Naghan section. a–b Wackestones/packstones with benthic foraminifera, among many porcelaneous taxa, and remains of dasycladalean algae. Note the specimen with prominent enrolled stage and alternating pillars in the youngest chambers in a (right). Thin-sections: NG 8 (a), 2NG 85-4 (b).
Fig. 6 Persiacyclammina maastrichtiana n. gen., n in Persiacyclammina Maastrichtiana N. Gen., N. Sp., A New Larger Benthic Foraminifer From The Maastrichtian Of Iran
Fig. 6 Persiacyclammina maastrichtiana n. gen., n. sp., upper Maastrichtian Tarbur Formation of the Naghan section, Zagros Zone, SW Iran. a–c, Almost centered equatorial sections. Arrow: Detail from b, showing remnants of an organic membrane inside the proloculus. d (holotype specimen), g, i, k, Oblique equatorial sections. e–f, h, j, l, Oblique sections. m, Oblique section of specimen with four uncoiled chambers (last chamber is broken). Note differing coiling axis of enrolled and uncoiled parts. Arrows in c and g = single, basal to areal foramina of the early growth stage. Abbreviations: p = proloculus, s = septum, s.s. = subepidermal septulum. Thin-sections: NG 71 (a), 2NG 159 (b), 2NG 83 (c), 2NG 81-1 (d–e, h), NG 107 (f), NG 144-2 (g), NG 52-2 (i), NG 113 (j), NG 116 (k), 2NG 81 (m).
FIGURE 73. Hoploscaphites peterseni, macroconch. A–D. USNM 723221, USGS loc. 7215 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME
FIGURE 73. Hoploscaphites peterseni, macroconch. A–D. USNM 723221, USGS loc. 7215, Pierre Shale, Weston County, Wyoming. A, Right lateral; B, apertural; C, ventral; D, left lateral. Arrow indicates the approximate base of the body chamber.
FIGURE 72. Hoploscaphites peterseni, macroconch. A–D. AMNH 71935, AMNH loc. 3921 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME
FIGURE 72. Hoploscaphites peterseni, macroconch. A–D. AMNH 71935, AMNH loc. 3921, Baculites baculus or lower B. grandis Zone, Pierre Shale, Cedar Creek Anticline, east-central Montana. A, Right lateral; B, apertural; C, ventral; D, left lateral. Note the lethal injury on the adapical end of the body chamber (missing piece of shell). Arrow indicates the approximate base of the body chamber.
FIGURE 69. Hoploscaphites peterseni, macroconch. A–D. AMNH 108443 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME
FIGURE 69. Hoploscaphites peterseni, macroconch. A–D. AMNH 108443, Pierre Shale, Cedar Creek Anticline, east-central Montana. A, Right lateral; B, apertural; C, ventral; D, left lateral. Arrow indicates the base of the body chamber.
FIGURE 68. Hoploscaphites peterseni, macroconch. A–D. USNM 723220, USGS loc. D1976 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME
FIGURE 68. Hoploscaphites peterseni, macroconch. A–D. USNM 723220, USGS loc. D1976, lower Baculites baculus Zone, Pierre Shale, Niobrara County, Wyoming. A, Right lateral; B, apertural; C, ventral; D, left lateral. Arrow indicates the base of the body chamber.
FIGURE 63. Hoploscaphites peterseni, macroconch. A–D. AMNH 135993 in LARGE SCAPHITID AMMONITES (HOPLOSCAPHITES) FROM THE UPPER CRETACEOUS (UPPER CAMPANIAN–LOWER MAASTRICHTIAN) OF NORTH AMERICA: ENDLESS VARIATION ON A SINGLE THEME
FIGURE 63. Hoploscaphites peterseni, macroconch. A–D. AMNH 135993, coarsely ribbed specimen, AMNH loc. 3921, lower Baculites baculus Zone, Pierre Shale, Cedar Creek Anticline, east-central Montana. A, Right lateral; B, apertural; C, ventral; D, left lateral. Note the longitudinal furrow resulting from a sublethal injury. Arrow indicates the approximate base of the body chamber.
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