Results 81 to 90 of about 18,619 (157)

The Silurian of Sardinia: introduction to the field trip

open access: yes, 2009
The general features of the Silurian of Sardinia are briefly outlined, with special respect to the two main facies suites exposed in the southeastern and southwestern parts of theisland, respectively.
CORRADINI C.   +2 more
core  

Palaeobiology of Silurian trilobites from North Greenland [PDF]

open access: yes, 2010
The Telychian (Llandovery, Silurian) reefs of North Greenland yield extensive collections of diverse and remarkably well preserved trilobites. The collections comprise 36 named trilobite species (32 new), and 30 under open nomenclature.
Hughes, Helen Elizabeth
core   +2 more sources

Difference Analysis of Organic Matter Enrichment Mechanisms in Upper Ordovician-Lower Silurian Shale from the Yangtze Region of Southern China and Its Geological Significance in Shale Gas Exploration

open access: yesGeofluids, 2019
The upper Ordovician-lower Silurian shale has always been the main target of marine shale gas exploration in southern China. However, the shale gas content varies greatly across different regions.
Ming Wen   +14 more
doaj   +1 more source

Cephalopod limestone biofacies in the Silurian of the Carnic Alps, Austria

open access: yes, 2009
Cephalopod limestones represent one of the most peculiar biofacies that developed in Silurian times along the northern margin of Gondwana. The presence and relative abundance of fossils, clearly visible in the field, enabled a taxonomic study of the main
HISTON, Catherine, FERRETTI, Annalisa
core  

Silurian and its surroundings in the inner nappes of Sardinian Variscides: lithostratigraphical evidence from metamorphosed deposits

open access: yes, 2009
In the tectonic units of the Inner Nappe Zone of the Sardinian Variscides, due to metamorphism and deformation, the Silurian System and its lower and upper boundaries are badly defined.
MAMELI, Paola, OGGIANO, Giacomo
core  

Paleomagnetic dating of rocks of the Bolshesyrsky magmatic area of the Minusinsky basin

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
Paleomagnetic dating of the Bolshesyrsky igneous area, a thick intraplate igneous complex of Khakassia, was carried out. The complex has not been dated due to the peculiarities of the stratigraphy and the lack of suitable rocks for applying the methods ...
D.V. Kovalenko, M.V. Buzina
doaj   +1 more source

Silurian landscape

open access: yes, 1904
Silurian ...
Shattuck, C. H.
core  

Preliminary account of the Silurian carbon isotope record (d13Corg) from the Barrancos region, Ossa Morena Zone, Portugal [PDF]

open access: yes, 2014
The Barrancos region provides one of the reference sections for the Silurian of the Ossa Morena Zone in Portugal. In this area the Silurian succession is condensed, with a maximum thickness of 50 m and the ages provided by graptolite faunas indicates
Goodhue, R.   +4 more
core  

Metamorphosis in a Silurian barnacle.

open access: yes, 2005
Exceptionally preserved fossils from the Wenlock Series (Silurian) of Herefordshire, UK, provide unique evidence of metamorphosis from free-swimming cyprid larva to attached juvenile in a Palaeozoic barnacle. The larva had large brush-like anterior limbs.
Derek E.G Briggs   +3 more
core   +1 more source

Multiply remagnetized Silurian carbonate sequence in Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2008
Palaeomagnetic studies were carried out on Silurian sedimentary rocks of Estonia. The studied sequence (126 samples from 4 localities) is composed of Silurian lime- and dolostones of Llandovery and Wenlock age (444–423 Ma).
Preeden, Ulla   +3 more
doaj  

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