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Actinoptychus

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1— <b>Actinoptychus</b> heliopelta  Grunow, sample Bethany Beach, 1142.3 ft. 2— Ac...
in > Geosphere
Published: 01 October 2013
Plate 4. 1— Actinoptychus heliopelta Grunow, sample Bethany Beach, 1142.3 ft. 2— Actinoptychus marylandicus Andrews, sample BG&E (Baltimore Gas and Electric Company), 139.5 ft. 3— Cymatogonia amblyoceras (Ehrenberg) Hanna, sample 29A-157R-1, 70 cm. 4— Sceptroneis caduceus Ehrenberg
Journal Article
Journal: PALAIOS
Published: 01 February 2000
PALAIOS (2000) 15 (1): 65-72.
..., Fragilaria construens (Ehrenberg) Grunow, Synedra ulna (Nitzsch) Ehrenberg, and Surrirella Turpin, as well as the freshwater algae Botryococcus Kutzing and Pediastrum Meyen. Shallow marine diatoms are represented by Actinoptychus Ehrenberg, Actinocyclus ehrenbergii Ralfs, Paralia sulcata (Ehrenberg) Cleve...
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Series: Geological Society, London, Special Publications
Published: 01 January 2000
DOI: 10.1144/GSL.SP.2000.181.01.07
EISBN: 9781862394292
... sulcata , Actinoptychus senarius ) and by a contemporary decrease in the holoplanktonic species towards the top, suggesting progressive environmental stress and a shallowing of the basin. Five of these cycles are clearly distinguished characterizing the initial stages of the evaporitic desiccation event...
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Journal Article
Published: 01 September 1983
Journal of Paleontology (1983) 57 (5): 883-891.
...Thomas J. Bergstresser; William N. Krebs Abstract Late Cretaceous (Campanian-Maastrichtian) diatoms found in the Pierre Shale of Wyoming, Colorado and Kansas are pyritized and appear to represent the genera Actinoptychus, Coscinodiscus, Trinacria, Endictya? and Gladius?. Three unidentifiable forms...
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*  CHARACTERISTIC DIATOMS OF THE UPPER PART OF MONTEREY SHALE  FIG. 1.— Act...
Published: 01 March 1925
PLATE 4. * CHARACTERISTIC DIATOMS OF THE UPPER PART OF MONTEREY SHALE FIG. 1.— Actinoptychus glabratus , var.; enlarged 340 diameters. FIG. 2.— Actinoptychus glabratus incisa Grunow; enlarged 210 diameters. FIG. 3.— Coscinodiscus incretus A. Schmidt; enlarged 270 diameters. FIG. 4
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Scanning electron micrographs of diatoms to illustrate some of the morpholo...
Published: 01 September 2014
Fig. 5. Scanning electron micrographs of diatoms to illustrate some of the morphological features. ( a ) Internal view of whole valve of Actinoptychus , showing valve undulation, radially arranged striae and labiate processes (lp) near the valve margin in alternate sectors. ( b ) External view
Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.230.01.14
EISBN: 9781862394780
.... Biddulphia biddulphiana, Saint-Josse, sample 17.87, SEM. Valve view. Frustule well preserved in pyrite (a); internal mould in framboids of pyrite (b). Fig. 5. Paralia siberica, Saint-Josse, sample 32.55-32.60, SEM. External view, specimen very well preserved. Figs 6 & 7. Actinoptychus senarius...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1928
AAPG Bulletin (1928) 12 (10): 969-983.
... radians Rattray Actinoptychus labratus montereyi Grunow Actinoptychus grundlerii Schmidt Actinoptychus interpunctatus Brightwell Actinoptychus laevigatus Grunow Actinoptychus minutus Greville Actinoptychus nitidus Greville Actinoptychus socius Schmidt Actinoptychus splendens crucifera...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1925
AAPG Bulletin (1925) 9 (2): 228-234b.
...PLATE 4. * CHARACTERISTIC DIATOMS OF THE UPPER PART OF MONTEREY SHALE FIG. 1.— Actinoptychus glabratus , var.; enlarged 340 diameters. FIG. 2.— Actinoptychus glabratus incisa Grunow; enlarged 210 diameters. FIG. 3.— Coscinodiscus incretus A. Schmidt; enlarged 270 diameters. FIG. 4...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1978
AAPG Bulletin (1978) 62 (9): 1714-1715.
... ( Lohman, 1948 ): Actinoptychus heliopelta Grunow, Aulacodiscus sollitianus Norman, and Craspedodiscus elegans Ehrenberg(?), plus a solitary radiolarian. Our samples of the 584 to 586-ft core from which Valia et al (1977) reported Miocene foraminifers yielded none of those species and only a few...
Journal Article
Journal: Geosphere
Published: 01 October 2013
Geosphere (2013) 9 (5): 1286-1302.
...Plate 4. 1— Actinoptychus heliopelta Grunow, sample Bethany Beach, 1142.3 ft. 2— Actinoptychus marylandicus Andrews, sample BG&E (Baltimore Gas and Electric Company), 139.5 ft. 3— Cymatogonia amblyoceras (Ehrenberg) Hanna, sample 29A-157R-1, 70 cm. 4— Sceptroneis caduceus Ehrenberg...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1945
AAPG Bulletin (1945) 29 (8): 1196-1202.
... a few frustules at the 1140–1150 level. The 1130–1140-foot level was examined critically as it represented the oldest diatom flora. The following species were identified: Actinocyclus crassus (W. Smith) Van Heurck, A. Ehrenbergii Ralfs, A. Heliopelta var. versicolor Brun, Actinoptychus...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 December 2003
PALAIOS (2003) 18 (6): 477-494.
... but consistent microfossil component. Diatoms include intact Paralia sulcata chains, Coscinodiscus spp., Actinoptychus spp., Cyclotella spp., Cymbella spp., Diploneis spp., and Chaetoceros resting spores. Silicoflagellate species include Dictyocha speculum and Dictyocha fibula , with D...
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Journal Article
Published: 01 December 2000
Journal of Micropalaeontology (2000) 19 (2): 123-131.
... across the Goban Spur margin; (b) bathymetric sections. Table 1. Raw counts of diatom data for the Goban Spur margin (B =Barren). Sample Transect 1 Transect 2 D86-1 D86-2 D86-3 D86-4 D86-5 D86-6 D86-7 D86-8 OMEX-C D86-9 D86-10 D86-11 Actinoptychus...
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Series: The Micropalaeontological Society, Special Publications
Published: 01 January 2017
DOI: 10.1144/TMS7.5
EISBN: 9781786203069
..., this zone is typified by a dominance of marine, marine-brackish and brackish water diatom species, with both planktonic and benthic species regularly encountered. The species present were typified by Paralia sulcata, Actinoptychus senarius, Nitzschia navicularis, Diploneis didyma and Achnanthes brevipes...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2000
DOI: 10.1144/GSL.SP.2000.166.01.07
EISBN: 9781862394148
... and HBM24). Some taxa are especially resistant to post-depositional dissolution (e.g. Paralia sulcata (Ehrenberg) Cleve, Actinoptychus senarius (Ehrenberg) Ehrenberg, Scoloneis tumida (Brebisson ex Kutzing) D. G. Mann) and dominate the flora of some outer-estuary cores in medium sands and silts...
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Series: AAPG Memoir
Published: 01 January 2003
DOI: 10.1306/M77973
EISBN: 9781629810041
... of three well preserved specimens of a large centric diatom ( Actinoptychus sp.). Note the simple circular shapes and the complexly patterned, radially arranged, sieve-like pore structure. PPL, HA = 0.51 mm Recent sediment, Florida Close-up view of two specimens of a centric diatom, Trinacria...
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Journal Article
Published: 01 September 2014
Journal of Micropalaeontology (2014) 33 (2): 111-120.
...Fig. 5. Scanning electron micrographs of diatoms to illustrate some of the morphological features. ( a ) Internal view of whole valve of Actinoptychus , showing valve undulation, radially arranged striae and labiate processes (lp) near the valve margin in alternate sectors. ( b ) External view...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1943
AAPG Bulletin (1943) 27 (10): 1335-1360.
..., Coscinodiscus aeginensis, C. asteromphalus, C. aff. excentricus, C. intersectus, C. obscurus, C. stellaris, C. vetustissimus, Actinocyclus octonarius, Actinoptychus marmoreus, A. perisetosus, Lithodesmium cornigerum, Xanthiopyxis ovalis, Thalassionema nitzschioides , and several undescribed forms. Pelagic...
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Series: GCSSEPM
Published: 01 December 1997
DOI: 10.5724/gcs.97.18.0377
EISBN: 978-1-944966-31-7
... marine algae. Those present include the nonmarine diatoms Aulacoseira spp., Fragilaria construens, Synedra ulna, and Surrirella spp . as well as the freshwater algae Botryococcus sp. and Pediastrum sp . Shallow marine diatoms are represented by Actinoptychus spp., Actinocyclus ehrenbergii, Paralia...