“Elevation and Subsidence” again

Abstract

A LETTER appears yesterday, again criticising Mr. Starkie Gardner's general views about pressure, in the same sense as was done by myself a fortnight ago. But, referring to that gentleman's opinion that pressure can render rocks molten or fluid, Mr. Young goes on to remark: “Is not the supposition the exact reverse of what is really the case, viz. that not only does pressure not liquefy rocks, but actually prevents their melting at a temperature at which they would melt were the pressure removed?” Your correspondent, offering this remark with a query, seems as if his mind was not quite made up on the subject; and with reason; for it must, I think, be considered at present an open question whether the temperature of rocky matter is, or is not, raised by pressure.