Paleogene


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Related to Paleogene: Paleocene, Paleogene Period, Neogene

Paleogene

[′pāl·ē·ō‚jēn]
(geology)
A geologic time interval comprising the Oligocene, Eocene, and Paleocene of the lower Tertiary period. Also known as Eogene.
References in periodicals archive ?
The beach sands at the mouth of Wadi Hajar consists dominantly of monocrystalline recycled quartz from the Cretaceous quartz arenites and limestone to dolomite grains from the Paleogene carbonates.
(Eds.), Paleogene Larger Rotaliid Foraminifera from the Western and Central Neotethys: Springer International Publishing, Basel, Switzerland, 3-12.
Fangzheng fault depression is a series of narrow and Cenozoic fault basin distributed in the northeast direction in the Tan-lu fault zone, which stratum develops from bottom to top:Cretaceous (K), Paleogene Paleocene Xin'ancun Formation ([E.sub.1]x), Eocene Dalianhe Formation ([E.sub.2]d), Oligocene Baoquanling Formation ([E.sub.3]b: [E.sub.3]b1, [E.sub.3][b.sub.2], [E.sub.3][b.sub.3]), Neogene Fujin Formation (Nf), and the Quaternary (Q) stratum, generally in the direction of the North East 40 [degrees]-50 [degrees], the area is about 1460[km.sup.2].
Wang, "Paleogene sedimentary characteristics and their paleoclimatic implications in the Baise Basin, Guangxi," Acta Geologica Sinica, vol.
The story behind the formation of this understated forest goes back to the Oligocene epoch (a geologic epoch of the Paleogene Period and dates back to about 30 million years ago), when an ancient branch of the Nile carried trees along and deposited them in the area.
Among the topics are Otto Renz (1906-92): pioneer of the Cretaceous and Paleogene stratigraphy of the Central Apennines, a history of the paleomagnetic investigations in the Umbria-Marche Apennines, whether the Rotalipora cushmani extinction at Gubbio is a planktonic foraminiferal testimonial of the onset of the Caribbean large igneous province emplacement, environmental fluctuations during the latest Cenomanian level in the Gubbio area based on an ichnofabric approach, and the Eocene Thermal Maximum 3: reading the environmental perturbations at Gubbio.
This problem becomes particularly sensitive with older records (Paleogene, early Miocene), for which most taxonomic affinities are indeed blurred (see below).
Based on the deformation features of the northern segment of the Tancheng-Lujiang Fault Zone during various geologic stages in the Mesozoic to Cenozoic, the tectonic evolution can be subdivided into the following stages: 1) the left-lateral strike-slip ductile shear stage (the last stage of J2, Middle Jurassic), 2) the left-lateral tenso-shear stage (the earlier-mid period of K1, Lower Cretaceous), 3) the right-lateral compression shear stage (the later period to the last stage of K2, Upper Cretaceous), 4) the right-lateral strike-slip fault depression stage (E, Paleogene) and 5) the structural inversion stage (the end of E3, Oligocene) [3].
There are poor reservoir properties in some of the Upper Cretaceous volcano-genic rocks and the Paleogene, Miocene and Upper Pliocene Fms.