Results 21 to 30 of about 37,171 (241)

Tibet, the Himalaya, Asian monsoons and biodiversity - In what ways are they related? [PDF]

open access: yes, 2017
Prevailing dogma asserts that the uplift of Tibet, the onset of the Asian monsoon system and high biodiversity in southern Asia are linked, and that all occurred after 23 million years ago in the Neogene. Here, spanning the last 60 million years of Earth
An   +107 more
core   +2 more sources

An early Eocene pan-gekkotan from France could represent an extra squamate group that survived the K/Pg extinction [PDF]

open access: yesActa Palaeontologica Polonica, 2023
In this paper we describe a new lizard from the early Eocene of the Cos locality in the Quercy region (near the Caylus village, Southwest France). The age of the Cos deposit has been proposed as the MP 10–11 interval, close to the transition of the ...
ANDREJ ČERŇANSKÝ   +4 more
doaj   +1 more source

Deep structure of the Baringo Rift Basin (central Kenya) from three-dimensional magnetotelluric imaging: Implications for rift evolution [PDF]

open access: yes, 2000
Three-dimensional modeling of data from 31 vertical electrical and 24 magnetotelluric soundings collected in the Baringo-Bogoria Basin (central Kenya Rift Valley) shows a thick succession of well-defined tectonostratigraphic units beneath the Recent ...
Achauer   +55 more
core   +2 more sources

Surface Microtextures of Quartz Grains and Origin of the Paleogene Sands in the Ulyanovsk-Syzran Volga Region

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2023
Quartz grains were separated by standard sieving of the Paleogene sands from the Sosnovka Formation of the Ulyanovsk-Syzran Volga region, which are a scarce and valuable raw material for glass making and construction.
S. О. Zorina   +3 more
doaj   +1 more source

Jurassic to Paleogene: Part 2 Paleogene geochronology and chronostratigraphy

open access: yesGeological Society, London, Memoirs, 1985
Summary We present a revised Paleogene geochronology based upon a best fit to selected high temperature radiometric dates on a number of identified magnetic polarity chrons (within the late Cretaceous, Paleogene and Neogene) which minimizes apparent accelerations in sea-floor spreading.
Berggren, William A.   +2 more
openaire   +3 more sources

Aporosa Blume from the paleoequatorial rainforest of Bikaner, India: Its evolution and diversification in deep time [PDF]

open access: yes, 2016
The Gondwanan origin, northward migration and subsequent collision with Asia means that the Indian subcontinent is of particular interest regarding the origin and dispersal of numerous plants and animal species.
Mehrotra, Rakesh C.   +3 more
core   +1 more source

Antarctic climate, Southern Ocean circulation patterns, and deep water formation during the Eocene [PDF]

open access: yes, 2017
We assess early-to-middle Eocene seawater neodymium (Nd) isotope records from seven Southern Ocean deep-sea drill sites to evaluate the role of Southern Ocean circulation in long-term Cenozoic climate change.
Anagnostou   +137 more
core   +1 more source

New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins [PDF]

open access: yes, 2013
Antarctic skulls attributable to fossil penguins are rare. Three new penguin crania from Antarctica are here described providing an insight into their feeding function.
Acosta Hospitaleche, Carolina Ileana Alicia
core   +2 more sources

Main controlling factors for the enrichment of shale oil and significant discovery in second member of Paleogene Funing Formation, Qintong Sag, Subei Basin

open access: yesShiyou shiyan dizhi, 2021
Based on the study of hydrocarbon generation features, oil bearing property and reservoir property of shale in the second member of Paleogene Funing Formation in the Qintong Sag of the Subei Basin, the main controlling factors of shale oil enrichment ...
Hongsheng YAO   +6 more
doaj   +1 more source

Evaluation and influencing factors for brittleness of lacustrine shale reservoir: a case study of Qutang Sub-Sag, Subei Basin

open access: yesShiyou shiyan dizhi, 2021
In order to accurately evaluate the brittleness of lacustrine shale and explore its influencing factors, the mineral compositions, geochemical characteristics and reservoir spaces of the lacustrine shale samples from the second member of Paleogene Funing
Biao SUN   +6 more
doaj   +1 more source

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