Results 31 to 40 of about 140,932 (287)

Geochemistry and petrogenesis of mafic and intermediate dyke swarms in eastern Tafresh (Urumieh-Dokhtar magmatic belt) [PDF]

open access: yesپترولوژی
IntroductionThe Urumieh-Dokhtar magmatic belt is one of the most active magmatic regions of Iran during the Cenozoic era. There are differing views regarding the tectonomagmatic setting of this magmatism; some attribute it to active continental margin ...
Ahmadreza Ahmadi, Behnaz Hosseini
doaj   +1 more source

The onset of grasses in the Amazon drainage basin, evidence from the fossil record [PDF]

open access: yes, 2020
Poaceae (the grass family) originated in the Cretaceous, but first dominate the palynological records of the Amazon drainage basin (ADB) in the Neogene (23 to 2.5 million years ago (Ma)).
Hoorn, Carina, Kirschner, Judith A.
core   +3 more sources

Miocene cladocera from Poland [PDF]

open access: yesScientific Reports, 2020
AbstractThe Bełchatów Lignite Mine of Poland is a treasure-cove for mid-to late Miocene plant and animal fossils, deposited in a slow-flowing river valley with swamps and oxbow lakes. Here, we report the finding of abundant fossil anomopod cladocerans. Some are three-dimensionally preserved, including the taxonomically important trunk limbs.
Dumont, Henri J.   +5 more
openaire   +2 more sources

Early Miocene (Burdigalian) Gastropod Faunas of Vareh Zard section, North of Pole-Dokhtar, (Lorestan, Iran) [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2014
A total 7 species and 13 genera of marine gastropod assemblages are reported for the first time from the Varehh Zard section (Asmari Formation), north of Pole Dokhtar, Lorestan Basin.
I. Maghfouri Moghaddam
doaj  

Unusual lizard fossil from the Miocene of Nebraska and a minimum age for cnemidophorine teiids [PDF]

open access: yesRoyal Society Open Science, 2020
Teiid lizards are well represented in the fossil record and are common components of modern ecosystems in North and South America. Many fossils were referred to the cnemidophorine teiid group (whiptails, racerunners and relatives), particularly from ...
Simon G. Scarpetta
doaj   +1 more source

Cranial Material of Long-Snouted Dolphins (Cetacea, Odontoceti, Eurhinodelphinidae) from the Early Miocene of Rosignano Monferrato, Piedmont (NW Italy): Anatomy, Paleoneurology, Phylogenetic Relationships and Paleobiogeography

open access: yesDiversity, 2023
We provide a new study of previously published eurhinodelphinid materials from the early Miocene of Piedmont (NW Italy) based on a new preparation of the fossil specimens. We studied specimens previously assigned to Tursiops miocaenus and Dalpiazella sp.
Vera Tosetto   +5 more
doaj   +1 more source

Diversity, stratigraphy and ecology of diatoms and plant pollen in the Miocene-Pliocene sediments of the Vitim Plateau (Baikal region, Russia)

open access: yesActa Biologica Sibirica, 2023
We performed lithogeochemical and biostratigraphical studies of the core from the hole 8182 in the Northern paleovalley of Vitim Plateau. According to lithogeochemical characteristics of the sediments in the section, 5 members were found out. Three lower
Мarina Usoltseva   +7 more
doaj   +1 more source

Morotochoerus de Uganda (17.5 Ma) y Kenyapotamus de Kenia (13-11 Ma): implicaciones sobre el origen de los hipopotámidos

open access: yesEstudios Geologicos, 2011
El objetivo de este trabajo es describir e interpretar los dientes suiformes de Moroto, Uganda, y Ngorora, Kenia, que contribuyen al debate sobre las relaciones hipo-anthracothere-whale.
M. Pickford
doaj   +1 more source

Mangarara Formation: exhumed remnants of a middle Miocene, temperate carbonate, submarine channel-fan system on the eastern margin of Taranaki Basin, New Zealand [PDF]

open access: yes, 2009
The middle Miocene Mangarara Formation is a thin (1–60 m), laterally discontinuous unit of moderately to highly calcareous (40–90%) facies of sandy to pure limestone, bioclastic sandstone, and conglomerate that crops out in a few valleys in North ...
Armstrong BD   +25 more
core   +2 more sources

Geochemistry and Isotope Geology of Adakitic Domes from ‎Chakane Area in South of Quchan (Northeast of Iran)‎ [PDF]

open access: yesپترولوژی, 2019
The Chekneh subvolcanic domes with dacite and trachydacite compositions from the Miocene is located  110 km NE of Sabzevar, and are parts of the North Sabzevar-South Ghochan magmatic belt.
Mehdi Rezaei-Kahkhaei   +3 more
doaj   +1 more source

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