flag of Sioux Falls
... that the pinkish-red portion of the flag of Sioux Falls represents the Sioux Quartzite stone which was quarried nearby and used to build early Sioux Falls buildings?
... that the pinkish-red portion of the <b id="mwBMQ"><a href="./Flag_of_Sioux_Falls,_South_Dakota" id="mwBMU" rel="mw:WikiLink" title="Flag of Sioux Falls, South Dakota">flag of Sioux Falls</a></b> <i id="mwBMY">(pictured)</i> represents the <a href="./Sioux_Quartzite" id="mwBMc" rel="mw:WikiLink" title="Sioux Quartzite">Sioux Quartzite</a> stone which was quarried nearby and used to build early Sioux Falls buildings?