Results 61 to 70 of about 3,403 (222)

Palynofloras of the Chigua (Devonian) and Malimán (Mississippian) formations from the Precordillera Argentina: age, correlation and discussion of the D/C boundary [PDF]

open access: yes, 2009
Se presenta el análisis cualitativo y cuantitativo de las asociaciones palinológicas obtenidas de las formaciones Chigua (Devónico) y Malimán (Mississippiano), aflorantes en la Cuenca Río Blanco, Precordillera Argentina.
Azcuy, Carlos Leopoldo   +2 more
core  

The Jurassic of Denmark and Greenland: Palynostratigraphy and palaeoenvironment of the Middle Jurassic Sortehat Formation (Neill Klinter Group), Jameson Land, East Greenland [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2003
The grey–black mudstones of the Sortehat Formation form part of the Middle Jurassic fill of the Jameson Land Basin in East Greenland. The formation is exposed in the southernmost part of the north–south-trending, Mesozoic rift system in East Greenland ...
Koppelhus, Eva B., Hansen, Carina F.
doaj  

Devonian and carboniferous palynostratigraphy of the South Portuguese zone, Portugal - an overview [PDF]

open access: yes, 2014
The South Portuguese Zone (SPZ) represents the southern branch of the Iberian Variscides and comprehends the following geologic domains: the Pulo do Lobo Antiform, the Iberian Pyrite Belt, the Baixo Alentejo Flysch Group and the Southwest Portugal ...
Fernandes, Paulo   +3 more
core  

Glacial events in Carboniferous sequences from Paganzo and Río Blanco Basins (Northwest Argentina): Palynology and depositional setting [PDF]

open access: yes, 2010
The age and depositional setting of two glacial events recognized in the western basins of Argentina are discussed in this paper. The older one corresponds to diamictites identified in the upper member of the Cortaderas Formation (Visean, Río Blanco ...
Césari, S.N.   +2 more
core   +3 more sources

Middle Jurassic sandstone deposition in the Wandel Sea Basin: evidence from cardioceratid and kosmoceratid ammonites in the Mågensfjeld Formation in Kilen, North Greenland

open access: yesGEUS Bulletin, 2020
Age assessments from both palynostratigraphy and macrofossil biostratigraphy of the sandstone-dominated Mågensfjeld Formation, Wandel Sea Basin, North Greenland were hitherto hampered by post-burial thermal degradation of dinoflagellate cysts and a lack ...
Peter Alsen   +2 more
doaj   +1 more source

Palynostratigraphy of the Lower Paleogene Margaret Formation at Stenkul Fiord, Ellesmere Island, Nunavut, Canada

open access: yesPalynology, 2021
The upper Paleocene to lower Eocene Margaret Formation exposed at Stenkul Fiord on southern Ellesmere Island, Nunavut, Canada, represents a nearly continuous terrestrial succession of microfossilrich clastic sediments and coal.
Markus Sudermann   +4 more
semanticscholar   +1 more source

Boreal waterways: An Early Cretaceous plesiosaur from Ellesmere Island, Nunavut, Canadian Arctic and its palaeobiogeography [PDF]

open access: yesActa Palaeontologica Polonica
A plesiosaur specimen collected from Ellesmere Island (Nunavut, Arctic Canada) by Danish geologist Johannes Troelsen in 1952 is described for the first time. The plesiosaur is late Berriasian to early Valanginian in age based on palynostratigraphy.
Lene L. Delsett   +3 more
doaj   +1 more source

The Upper Devonian palynostratigraphy and organic matter maturation of the Pulo do Lobo domain, South Portuguese Zone, Portugal [PDF]

open access: yes, 2006
Investigações palinoestratigráficas efectuadas na parte portuguesa do Domínio do Pulo do Lobo, Zona Sul Portuguesa, permitiram rever as datações das suas unidades constituintes e estabelecer as seguintes correlações: as Formações de Pulo do Lobo e ...
Fernandes, Paulo   +2 more
core  

Combined study of mineral deposits and deep geothermal for energy production or urban heating – Comparison between the Portuguese (Neves-Corvo) and the Hungarian (Recsk) case studies [PDF]

open access: yes, 2018
Energy and metals are essential resources in the 21st century and with the economic and technical development are more and more required. The fulfilling of these requirements leads to the need to produce both more ore and energy. Considering these goals,
Matos, João Xavier   +3 more
core   +2 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

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