نتایج جستجو برای: lower eocene

تعداد نتایج: 695634  

Journal: :Arabian Journal of Geosciences 2023

Abstract In Egypt, Wadi Qena Middle Eastern Desert, Paleogene successions exposed at Hawashiya and Abu Had sections from north to south were measured comprehensively investigated for their foraminiferal content. The Dakhla, Tarawan, Esna formations make up the sections. studied are subdivided into six biozones; they five zones of Late Paleocene ( Igorina albeari subzone (P3b), G. Globanomalina ...

Journal: :Journal of Maps 2022

The Cenozoic succession of the East Pisco Basin preserves sedimentary record several episodes deformation forearc crust along Peruvian margin. 1:50,000 scale geological map presented here encompasses an area about 1,000 km2 lying astride Ica River, and contributes to our understanding timing mode basin filling deformation. Our novel two-fold megasequence framework provides a sound basis for est...

Journal: :journal of tethys 0

calcareous nannofossil assemblages of the boundary paleocene-eocene deposits (pabdeh formation) of the zagros, dezful embayment-mansouri oilfield have been studied in detail. it consists of shale and grey marlstone with inter layers of calcareous argillites and marly claystone. we present a study focused on changes in calcareous nannofossils of the pabdeh formation during the paleocene/eocene b...

1999
RALPH E. HARBACH

Culiseta kishenehn, sp. n. and Cs. lemniscata, sp. n. (Diptera: Culicidae: Culisetini) are described from compression fossils from the 46 million year old Kishenehn shale deposits in Montana, USA. The new species appear to share features with extant species of subgenera Climacura and Culicella, respectively. The antiquity of Culiseta is examined and previously described Eocene fossil species ar...

2001
Leonel Silveira Lobo Sternberg

The spectacularly preserved Metasequoia wood excavated from the Fossil Forest site of Axel Heiberg Island (Canadian High Arctic) provides a unique window into the δ18O value of Eocene meteoric water via the analysis of fossil cellulose. Seventeen fossilized Metasequoia individuals yielded cellulose with δ18O (Vienna standard mean ocean water [VSMOW]) values ranging from 17.1‰ to 21.4‰ and with ...

2009
Lucy Stap Appy Sluijs Ellen Thomas Lucas Lourens

[1] Eocene Thermal Maximum 2 (ETM2 or H1; 53.7 Ma) represents a short-lived warming episode, associated with the injection of a large mass of C-depleted carbon into the ocean-atmosphere system. The mass of injected carbon, the extent of deep sea dissolution, and the amount of warming during ETM2 appear to be approximately half of those documented for the Paleocene-Eocene thermal maximum (PETM, ...

2012
DOUGLAS W. BURBANK

Abundant and clearly exposed relationships between structures and syntectonic sedimentary rocks in the southern Pyrenees make this area particularly suitable for detailed studies of the sequential development of a collisional orogenic belt. During the Pyrenean orogeny, major shortening occurred in the eastern Pyrenees in Eocene and early Oligocene times. Unto now, individual tectonic and deposi...

1999
S. BRUCE ARCHIBALD

Four new scorpionfly species of the family Cimbrophlebiidae (Mecoptera) are described in the genus Cimbrophlebia Willmann from two localities of the far-western North American Early Eocene Okanagan Highlands: C. flabelliformis sp. n. and C. leahyi sp. n. from McAbee, British Columbia, Canada; and C. brooksi sp. n. and C. westae, sp. n. from Republic, Washington, U.S.A. A further, partially pres...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید