Part IV. The carboniferous rocks near Bathgate.

Trace fossils of the arthropod Camptophyllia from the Westphalian (Carboniferous) rocks of Lancashire, UK and their palaeoenvironmental context

Article history: Two arthropod trace foss Received 1 October 2006 Accepted 24 January 2008

A Late Carboniferous fossil scorpion from the Piesberg, near Osnabrück, Germany

The Late Carboniferous (Pennsylvanian) Coal Measures of Europe and North America have yielded nearly forty accepted scorpion species (Fet et al. 2000); over a third of the known fossil fauna. On the face of it, scorpions would appear to be one of the most diverse groups found within these Coal Measures environments. However, at least some taxa seem to be of questionable validity, having been ra...

Determinants of Cyclic Sedimentation in Pottsville Rocks near Dundee, Ohio

basics of human genetics, , part iv

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Part I : Part Ii : Part Iii : Part Iv

The theory of stick-slip is developed, based on the concept of a static and dynamic coefficient of friction. The dynamic coefficient is assumed to be independent of displacement and to depend wholly on normal stress across the surface. It is also assumed to be velocity-independent. The theory predicts that the stress drop during stick-slip is independent of machine stiffness. The displacement d...