Chromospinelide of terrigeneous lower Paleozoic deposits in the uralide/preuralide contact (Polar Urals)

The results of the study of chromospinelide from the Lower Paleozoic clastic rocks in the interformational uralide/preuralide contact in the interfluve area of rivers of Small Usa and Small Cara. Chromospinelide can continuously preserve its typomorphic features. The compositional features of chromites suggest the source and information on postdiagenetic transformation. Chromospinelide from clastic strata has a specific structure due to supergene changes, which allows its using as a marker for correlations of outcrops.