“…The Elk Creek Carbonatite (Treves et al, 1972a, b;Brookins et al, 1975) intrudes Upper Pennsylvanian strata along the crest of the Nemaha Uplift in southeast Nebraska (R. R. Burchett, 1983, personal comm.). Late Cretaceous peridotite dikes intruding Upper Pennsylvanian strata are known along 38°N latitude in southeast Kansas (Knight andLandes, 1932, Zartman et al, 1967;Franks et al, 1971).…”