The Lower Llandoverian metasedimentary series of the Prades Mountains, in southwestern Catalonia, Spain, consists of interbedded massive feldspar beds, composed of almost pure anorthite, with chert, phosphate beds, sulfide-rich black shale, massive sulfides and minor calc-silicate beds. The sulfides mainly consist of pyrrhotite with minor chalcopyrite. The metasedimentary rocks are anomalously ...

khoroslodaghlocated in northwestern of iran and south of moghan plain in ardabil province. these mountainsare from azarbyjan mountains unit and are separated from caucasus and talesh mountains in azarbyjan republic. study area was folded by upper pliocene and quaternary orogeny. pliocene orogeny was severe but quaternary folded was calm. afterward orogeny movements and folding, invertedrelief (...

Pennsylvanian to Cretaceous folds and thrusts in south-central Nevada: evidence from the Timpahute Range by Angela Russo Dr. Wanda J. Taylor, Examination Committee Chair Professor of Geoscience University of Nevada, Las Vegas Understanding Permian and Mesozoic contractional structures from southern California to northern Nevada requires correlation through south-central Nevada. After the Devoni...

Drăguşanu and Tanaka (1999) provide intriguing new chemical and isotopic analyses of amphibolites and gneisses from the Cumpăna Group, the oldest lithostratigraphic unit in the Getic-Supragetic unit of the South Carpathians (Balintoni 1975; Pana 1994). Ten amphibolite whole-rock data points form a linear trend in a plot of measured Nd/Nd against Sm/Nd (Drăguşanu and Tanaka 1999, fig. 3). Drăguş...

Drăguşanu and Tanaka (1999) provide intriguing new chemical and isotopic analyses of amphibolites and gneisses from the Cumpăna Group, the oldest lithostratigraphic unit in the Getic-Supragetic unit of the South Carpathians (Balintoni 1975; Pana 1994). Ten amphibolite whole-rock data points form a linear trend in a plot of measured Nd/Nd against Sm/Nd (Drăguşanu and Tanaka 1999, fig. 3). Drăguş...

The Ordovician radiation of marine life was among the most substantial pulses of diversification in Earth history and coincided in time with a major increase in the global level of orogenic activity. To investigate a possible causal link between these two patterns, the geographic distributions of 6576 individual appearances of Ordovician vician genera around the world were evaluated with respec...

The distribution and dispersal histories of Eurypterida are examined in a phylogenetic and palaeogeographic context. It is suggested that all the eurypterid clades originated and had most of their evolutionary history on the palaeocontinents of Laurentia, Baltica, Avalonia, the Rheno–Hercynian Terrane and some presence in Siberia. The Siluro–Devonian Stylonurina and the eurypterine superfamilie...