Results 91 to 100 of about 3,539 (164)

Miospore assemblages from Late Ordovician (Katian-Hirnantian), Ghelli Formation, Alborz Mountain Range North-eastern Iran: Palaeophytogeographic and palaeoclimatic implications [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2016
Well-preserved miospore assemblages are recorded from the Late Ordovician (Katian-Hirnantian), Ghelli Formation in Pelmis-gorge at the north-eastern Alborz Mountain The palynomorphs were extracted from siliciclastic deposits which are well-dated by using
M. Ghavidel-syooki
doaj  

A case for an active eukaryotic marine biosphere during the Proterozoic era. [PDF]

open access: yesProc Natl Acad Sci U S A, 2022
Eckford-Soper LK   +3 more
europepmc   +1 more source

Critères palynostratigraphiques conduisant à la reconnaissance d'un pli couché Revinien dans le sondage de Grand-Halleux [PDF]

open access: yes, 1978
The biostratigraphY based on palynology is given of the most important sections through the lower and middle Revinian of the Stavelot, Rocroi and Givonne massifs. Four assemblage-zones of interregional value are recognised.
Vanguestaine, M.
core  

Chirotherium barthii Kaup 1835 from the Triassic of the Isle of Arran, Scotland [PDF]

open access: yes, 2002
The mould of a track from SE Arran, and several in situ trackways and individual tracks, as well as a partial trackway on a loose block of Triassic sandstone, from western Arran, represent the first verifiable fossil tracks of Chirotherium from the ...
BENTON   +14 more
core   +1 more source

Données palynologiques nouvelles dans l'Ordovicien inférieur du bassin de la Senne, Massif du Brabant, Belgique [PDF]

open access: yes, 1978
The massive phyllites of Oisquercq in the Senne Basin are followed up by quartz phyllites which have yielded acritarchs of several different ages for the different localities, viz.
Vanguestaine, M.
core  

New records in old material : preliminary data on Floian Acritarchs : a surprising new world in the Nery Delgado Collection at the Geological Museum, Portugal [PDF]

open access: yes, 2008
Nery Delgado (1835-1908) was one of the pioneers of Portuguese geology. In 1857, the Geological Survey of Portugal (GSP) was created as a section of the Geodesic Service of the Public Works Ministry. N. Delgado was involved since the beginning; he worked
Borges, Marisa   +4 more
core  

Ghana airborne geophysics project in the Volta and Keta Basin : BGS final report [PDF]

open access: yes, 2009
This report describes the work undertaken by BGS between November 2006 and March 2009 in collaboration with Fugro Airborne Surveys Pty Ltd on an airborne geophysical survey and ground reconnaissance mapping of the Volta River and Keta Basins, Ghana ...
Carney, J.N.   +3 more
core  

Are the green algae (phylum Viridiplantae) two billion years old?

open access: yesCarnets de Géologie, 2006
In his book, Life on a young planet, A.H. Knoll states that the first documented fossils of green algae date back 750 Ma. However, according to B. Teyssèdre's book, La vie invisible, they are much older.
Teyssèdre Bernard
doaj  

Acritarch-like Microorganisms from the 1.9 Ga Gunflint Chert, Canada. [PDF]

open access: yesAstrobiology, 2022
González-Flores AL   +3 more
europepmc   +1 more source

LOWER KARROO (PERMlAN) ACANTHOMORPHITAE ACRlTARCHS FROM SOUTH AFRICA [PDF]

open access: yes, 1969
Eight populations of fifty individuals of Acritarchs from the Permian marine horizons of South Africa are statistically analysed and assigned to two species of Micrhystridium.
Hart, George F.
core  

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