Chattian larger foraminifera from Risan Aneiza, northern Sinai, Egypt, and implications for Tethyan paleogeography
Boukhary, professor Mohamed; J. Kuss;
Abstract
ABSTRACT: Micropaleontologic studies on newly discovered, isolated occurrences of carbonate strata at Risan Aneiza, Northern Sinai,
identified six corallinacean taxa,five larger foraminifera taxa and two smaller foraminifera, among the larger foraminifera, one genus,
Risananeiza (type species: Risananeiza pustulosa) and one species: Nephrolepidina sinaica n.sp. are believed to be new. The larger
foraminifera are classified, described and illustrated. Among them Miogypsinoides complanatus is an index taxon according to Cahuzac
and Poignant (1997), for shallowwater Oligocene deposits of western European basins. This species indicates SB 23 (SB=shallowwater
benthic) - a late Oligocene, Chattian age (24.5Ma, Gradstein et al. 2004). The exposures are the first documented shallowmarine strata of
Upper Oligocene (Chattian) age for the region. Their location between coeval continental strata to the south and fine-grained
siliciclastics found in offshorewells is clear evidence of the position of the
identified six corallinacean taxa,five larger foraminifera taxa and two smaller foraminifera, among the larger foraminifera, one genus,
Risananeiza (type species: Risananeiza pustulosa) and one species: Nephrolepidina sinaica n.sp. are believed to be new. The larger
foraminifera are classified, described and illustrated. Among them Miogypsinoides complanatus is an index taxon according to Cahuzac
and Poignant (1997), for shallowwater Oligocene deposits of western European basins. This species indicates SB 23 (SB=shallowwater
benthic) - a late Oligocene, Chattian age (24.5Ma, Gradstein et al. 2004). The exposures are the first documented shallowmarine strata of
Upper Oligocene (Chattian) age for the region. Their location between coeval continental strata to the south and fine-grained
siliciclastics found in offshorewells is clear evidence of the position of the
Other data
| Title | Chattian larger foraminifera from Risan Aneiza, northern Sinai, Egypt, and implications for Tethyan paleogeography | Authors | Boukhary, professor Mohamed ; J. Kuss | Issue Date | 2008 | Journal | stratigraphy, vol. 5, no. 2, pp. 179-192, text-figures 1-7, plates 1-3, tables 1-2, 2008 |
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