Effect of Large Changes in Strain Rate in the Experimental Deformation of Yule Marble

A new adaptable deformation apparatus has been developed for constant strain-rate tests up to 5 kb. confining pressure and 500° C. at strain rates from 0.4 to . In most of the sixty-four tests reported here, jacketed cylinders of Yule marble (oriented parallel, at 45° and normal to the foliation) were extended 10 per cent at temperatures from 25° to 500° C., 5 kb. confining pressure. Several samples were deformed 60-80 per cent at temperatures...