• Ordovician and Lower Devonian OMZ rocks contain an important 1 Ga detrital zircon population. Sahara metacraton provided the grains in Ordovician-Devonian rocks. equivalent terranes were translated eastwards during final Cadomian tectonics. The Ossa-Morena Zone Iberia, northern France Central Europe, are thought to be paleogeographically linked West African Craton at Ediacaran early Paleozoic...

Abstract Horseshoe crabs as a group are renowned for their morphological conservatism punctuated by marked shifts in morphology associated with the occupation of non-marine environments and have been suggested to exhibit consistent developmental trajectory throughout evolutionary history. Here, we report new species horseshoe crab from Ordovician (Late Sandbian) Kingston, Ontario, Canada, juven...

Van der Plmjm, B.A., 1987. Timing and spatial distribution of deformation in the Newfoundland Appalachians: a “multi-stage collision” history. In: H.J. Zwart, M. Martens, I. van der Molen, C.W. Passchier, C. Spiers and R.L.M. Vissers (Editors), Tectonic and Structural Processes on a Macro-, Mesoand Micro-Scale. Tectonophysics, 135: 15-24. The Newfoundland Appalachians have been interpreted as a...