Largeamountsof halophilic organisms and theirfossils thatare foundin theBarkolmirabilite depositare identicalto thoseof its modembiologicalcommunityresidingin itssurfacebrines.The extent of investigationto which organisms contributedto the mirabilite mineralization in the BarkolLake demonstrates that the genetic mechanism of this type of oredepositis betterexplained by biochemical deposition than by thewidelyaccepted, purelychemicaldeposition which, thoughapprovedbyclassicalgeologists, willcertainlyberevisedin thefuture.