Results 21 to 30 of about 44,585 (300)
Climate constrains the evolutionary history and biodiversity of crocodylians [PDF]
, 2015 The fossil record of crocodylians and their relatives (pseudosuchians) reveals a rich evolutionary history, prompting questions about causes of long-term decline to their present-day low biodiversity.
Benson, RBJ +5 more
core +2 more sources
Deep structure of the Baringo Rift Basin (central Kenya) from three-dimensional magnetotelluric imaging: Implications for rift evolution [PDF]
, 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
Учёные 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
An early Eocene pan-gekkotan from France could represent an extra squamate group that survived the K/Pg extinction [PDF]
Acta 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
Jurassic to Paleogene: Part 2 Paleogene geochronology and chronostratigraphy
Geological 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
Palynostratigraphy and palynofacies of the early Eocene Gurha lignite mine, Rajasthan, India [PDF]
, 2016 A 105 m early Eocene section exposed in the Gurha mine in the Nagaur-Ganganagar Basin, Rajasthan, India, archiving remains of equatorial vegetation at a time of extreme global warmth and close to the onset of the India-Eurasia collision, is investigated ...
Aggarwal +50 more
core +1 more source
An effective palynological preparation procedure using hydrogen peroxide [PDF]
, 2007 Most pre-Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively).
Kyffin-Hughes, Jane E. +2 more
core +2 more sources
Shiyou 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
Taxonomy and biostratigraphy of new and emended species of Cenozoic deep-water agglutinated foraminifera from the Labrador and North Seas [PDF]
, 1989 Deep marine, fine grained sedimentary strata of Maastrichtian through Miocene age in the Labrador and North Sea sedimentary basins are rich in agglutinated benthic foraminifera.
Gradstein, F. M., Kaminski, M. A.
core +1 more source
Shiyou 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