A fossil barite hot spring mound in the Holy Cross Mts.; a test of the isotope age hypothesis

Abstract

A fossil barite hot spring mound of upper Lower Triassic age was discovered in the southwestern part of the Holy Cross Mts., Poland. It has been investigated using petrographic and isotopic methods. “The oxygen thermometer” has indicated 95-96°C as an average temperature of the examined barite formation. The lithostratigraphically established age of barite mineralization versus its host sandstones was con finned by the mean δ³⁴S value (16.1 ‰) which corresponds to the upper Lower Triassic.