Previous experience tracing iron formation and lime silicates in the west (U.S.) is in part the basis for field and map methods. A tracing of the Auerbacher Marmor (Auerbach Marble) southwards in the Odenwald just off the Rhine Plain (Graben) of Hessen passed into lime silicate skarn and gabbro to the local outcrop of the "Schriesheimit" (Ca peridotite) occurrence. Interpretation: Here is a case where the Auerbacher Marmor accounts for the gabbro and schriesheimit (of Schriesheim) (in Baden). Further criteria: a) high Ca content of the Schriesheimit, b) the spektrum of metamorphic/metasomatic alteration products of the marble at Auerbach to the north, c) occurrence of lime silicate skarn and gabbro just to north of schriesheimit locality, d) tungsten (scheelite) in the skarn and in the marble at Auerbach.