NewLate Eocene genus Gaziryina (Foraminifera) from the Al Bayda Formation (ShahhatMarl Member), Al Jabal al Akhdar, Northern Cyrenaica, Libya
Boukhary, professor Mohamed; Ahmed M. Muftah1;
Abstract
ABSTRACT: The foraminifers of the ShahhatMember of the Al Bayda Formation exposed in three sections (at theWadi Az Zad quarry,
and theWadi Al Kuf and Al Hamamah road cuts) in the region of Jabal Al Akhdar in Libya have been investigated. The rock unit consists
of marly limestone grading intomarl in places and is assigned a Late Eocene age according to the presence of forms suggesting the Nummulites
fabianii Biozone, and suggesting also the EarlyOligocene age, towhich the ShahhatMember has been generally assigned inmost
previous publications should be revised. Nummulites ruetimeyeri de la Harpe 1883 and Chapmanina gassinensis (Silvestri 1904) has
been recovered in association with Nummulites fabianii (Prever in Fabiani 1905). Gaziryina pulchellus (Hantken 1883) n. gen. in de la
Harpe (1883) has also been retrieved in associationwith a Nonion-Uvigerina assemblage suggesting relatively deep marine conditions in
the lower intervals of the investigated Late Eocene marly sequence. Nummulites gizehensis (Forskal) is found in the underlying Darnah
Formation (Middle Eocene, Lutetian), and the overlying algal limestone of the remaining of the Al Bayda Formation includes species
and theWadi Al Kuf and Al Hamamah road cuts) in the region of Jabal Al Akhdar in Libya have been investigated. The rock unit consists
of marly limestone grading intomarl in places and is assigned a Late Eocene age according to the presence of forms suggesting the Nummulites
fabianii Biozone, and suggesting also the EarlyOligocene age, towhich the ShahhatMember has been generally assigned inmost
previous publications should be revised. Nummulites ruetimeyeri de la Harpe 1883 and Chapmanina gassinensis (Silvestri 1904) has
been recovered in association with Nummulites fabianii (Prever in Fabiani 1905). Gaziryina pulchellus (Hantken 1883) n. gen. in de la
Harpe (1883) has also been retrieved in associationwith a Nonion-Uvigerina assemblage suggesting relatively deep marine conditions in
the lower intervals of the investigated Late Eocene marly sequence. Nummulites gizehensis (Forskal) is found in the underlying Darnah
Formation (Middle Eocene, Lutetian), and the overlying algal limestone of the remaining of the Al Bayda Formation includes species
Other data
| Title | NewLate Eocene genus Gaziryina (Foraminifera) from the Al Bayda Formation (ShahhatMarl Member), Al Jabal al Akhdar, Northern Cyrenaica, Libya | Authors | Boukhary, professor Mohamed ; Ahmed M. Muftah1 | Issue Date | 2013 | Journal | micropaleontology, vol. 59, nos. 2–3, text-figures 1–5, plate 1, pp. 103–109, 2013 |
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