Over 150 years of progress in the Ordovician geology and stratigraphy of Estonia has
resulted in one of the most precise Ordovician timescales in the world. In this paper, an up-to …

[EN] The present paper reviews the Ordovician, Silurian and Devonian sedimentary rocks of
the Ossa-Morena Zone of the SW Hesperian (Iberian) Massif in Spain and Portugal. It gives …

This paper presents new ideas on the Early Palaeozoic geography and tectonic history of
the Iapetus Ocean involved in the formation of the northern Appalachian-British Caledonide …

The Argentine Precordillera is a continental fragment rifted from the Ouachita embayment of
the southern margin of Laurentia (North America) during Cambrian time [about 515 million …

The Global boundary Stratotype Section and Point (GSSP) for the base of the Hirnantian
Stage (the uppermost of the Ordovician System) is defined at a point 0.39 m below the base …

Here we present Sr, C, and O isotope curves for Ordovician marine calcite based on
analyses of 206 calcitic brachiopods from 10 localities worldwide. These are the first …

697 taxa of planktonic graptolites are recorded, and their stratigraphical ranges are given,
through 60 biozones and subzones in the Ordovician and Silurian strata of England, Wales …

The Society makes every effort to ensure that the scientific and production quality of its
books matches that of its journals. Since 1997, all book proposals have been refereed by …

Abstract The Ordovician of Scandinavia (ie Denmark, Norway and Sweden) has been
investigated for over two centuries and, through time, various chronostratigraphic schemes …

&Quot; This Report is revised and expanded from the 1972 publication, providing an up-to-
the-minute account of the British Ordovician formations and their correlation nationally and …