Results 41 to 50 of about 64,380 (320)
On the graptolite schist's formation, Silurian-Lower Devonian, in the Carpatho-Balkanides of eastern Serbia [PDF]
Geološki Anali Balkanskoga Poluostrva, 2005 The fabric of the Silurian and a part of the Lower Devonian in the Carpatho-Balkanides of eastern Serbia, i.e. in two large geotectonic units, the Kučaj Unit (Getic) and the Luznica Unit (West Kraishte), is reviewed in this paper.
Krstić Branislav +2 more
doaj +1 more source
Petroleum, 2023 A significant phase of global warming appeared during the Llandovery and productive Silurian hot shale was preserved all over the world. The lower Silurian shale is the main effective source rock for most of the Paleozoic hydrocarbon in Iran and the ...
Ali Rahmani +2 more
doaj +1 more source
The Silurian Cephalopoda [PDF]
Proceedings of the Geologists' Association, 1904 n ...
openaire +2 more sources
Journal of Geophysical Research: Earth Surface, 2019 Flume experiments and field observations show that bank vegetation promotes the formation of narrow and deep single‐thread channels by strengthening riverbanks.
M. Lapôtre +4 more
semanticscholar +1 more source
Evidence from Rb–Sr mineral ages for multiple orogenic events in the Caledonides of Shetland, Scotland [PDF]
, 2015 Shetland occupies a unique central location within the North Atlantic Caledonides. Thirty-three new high-precision Rb–Sr mineral ages indicate a polyorogenic history.
Bird, A. F. +3 more
core +3 more sources
The trace fossil Zoophycos from the Silurian of Estonia [PDF]
Estonian Journal of Earth Sciences, 2015 Trace fossils of the ichnogenus Zoophycos have been described for the first time from the Silurian of Baltica. They occur in Llandovery pure limestones of middle Estonia and in Ludfordian argillaceous limestones and early Pridoli crinoid grainstones of ...
Olev Vinn, Ursula Toom
doaj +1 more source
Searching for the Ordovician–Silurian boundary in Estonia, Latvia and Lithuania [PDF]
Estonian Journal of Earth Sciences, 2023 The present study focuses on determining the position of the lower boundary of the Silurian System in the eastern Baltic region. To achieve this, we conducted a comprehensive analysis of stable isotopic curves, combined with previously published data on ...
Tõnu Meidla, Olle Hints, Leho Ainsaar
doaj +1 more source
Rifting and arc-related early Paleozoic volcanism along the North Gondwana margin: geochemical and geological evidence from Sardinia (Italy) [PDF]
, 2012 Three series of volcanic rocks accumulated during the Cambrian to Silurian in the metasediment-dominated Variscan basement of Sardinia. They provide a record of the changing geodynamic setting of the North Gondwana margin between Upper Cambrian and ...
BUZZI L +3 more
core +1 more source
Minerals, 2018 Organic matter is the material basis of hydrocarbon generation and the abundance of organic matter is a main factor of regional selection and evaluation in shale gas. Also the enrichment is influenced by sedimentary environments.
Kun Zhang +13 more
semanticscholar +1 more source
The oldest ascocerid cephalopod from the Silurian of Estonia and notes on the biogeography of the order Ascocerida (class Cephalopoda) [PDF]
Estonian Journal of Earth Sciences, 2016 The early Palaeozoic order Ascocerida is a group of morphologically unique and rare cephalopods known from the Ordovician and Silurian rocks of Avalonia, Baltica, Laurentia and Perunica.
Martina Aubrechtova, Tõnu Meidla
doaj +1 more source