Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum, Volume 106South African Museum, 2003 - Natural history |
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Page 154
... rounded in cross - section . Two additional ribs are present , one on either side of the thickened rib , and are sub - parallel to it , thus forming an irregularly tricarinate dorsal margin . Ventral margin sub - rectangular to rounded ...
... rounded in cross - section . Two additional ribs are present , one on either side of the thickened rib , and are sub - parallel to it , thus forming an irregularly tricarinate dorsal margin . Ventral margin sub - rectangular to rounded ...
Page 161
... rounded in cross - section , rarely acute , although the difference is probably due to post - depositional leaching of acute ribs . The ribs merge at the apical point of the test , where a short , blunt , rounded apical spine is ...
... rounded in cross - section , rarely acute , although the difference is probably due to post - depositional leaching of acute ribs . The ribs merge at the apical point of the test , where a short , blunt , rounded apical spine is ...
Page 191
... rounded to sub - rounded ventral margins and sub - rounded to acute dorsal margins . A very weak keel may occur on the dorsal margin in the early part of the test . The sutures are marked by raised , thick , low and rounded ribs that ...
... rounded to sub - rounded ventral margins and sub - rounded to acute dorsal margins . A very weak keel may occur on the dorsal margin in the early part of the test . The sutures are marked by raised , thick , low and rounded ribs that ...
Contents
Introduction | 5 |
Foraminiferal biozonation of the Sundays River Formation | 33 |
The Algoa Basin outcrops | 44 |
Copyright | |
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Common terms and phrases
Agrio Formation Albian ammonites apertural view Aptian Argentina assemblages Astacolus Barremian Bartenstein & Brand Berriasian Bettenstaedt borehole borehole PB-A1 Citharina Cliff outcrop sample Coega Coega Brick Pits core Dentalina DIEGO Dorothia dorsal margin down-hole appearance Early Barremian Early Cretaceous Early Hauterivian environments Eoguttulina Epistomina caracolla Espitalié & Sigal feet VII Figure final chamber final whorl foraminifera genus Graaff-Reinet grey claystone Haplophragmoides sp hofkeri Holotype illustrated Kimmeridgian Kirkwood Formation Lagena Late Hauterivian Biozone Late Valanginian Biozone lignite Lingulina Loeblich & Tappan Magniez-Jannin 1975 Majunga Basin Masiuk & Viña McLachlan Mngazana Basin Musacchio Nodosaria occur offshore ornamentation ostracods Paratype Planularia Pletmos Basin Portlandian rare lignite Reinholdella valendisensis Remarks Reuss Río Mayer Roemer shallow borehole shelf shell side view silty SOEKOR negative South Africa southern species specimens Stratigraphic range Sundays River Formation sutures test periphery test wall Trochammina Uitenhage Uitenhage to Graaff-Reinet Vaginulinopsis weakly Zoetgeneugd Cliff outcrop