Late Albian (Upper Gault)
Zonal and Sub-Zonal Ammonites
Mortoniceras
inflatum Zone
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Zonal Ammonite Mortoniceras inflatum
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Sub-Zonal Ammonite Callihoplites auritus |
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Sub-Zonal Ammonite Hysteroceras varicosum |
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Sub-Zonal Ammonite Hysteroceras orbignyi |
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Sub-Zonal Ammonite Dipoloceras cristatum |
References: |
a. Wright C. W. 1996. Treatise on Invertebrate Paleontology (Part L Mollusca 4 Revised) Volume 4: Cretaceous Ammonoidea b. Spath L. F. 1929. A Monograph of the Ammonoidea of the Gault; Part VIII. Palaeontographical Society London |
Jim Craig - 2000
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