ABOUT US COMPANY HISTORY Company History MILESTONES & MOMENTS 1939 Aggregates company Superior Stone was founded in Raleigh, NC. 1959 Superior Stone merged with the American-Marietta Corp., a national producer of construction materials, paints, chemicals and building products. 1961 Merger of American-Marietta Corp. and the Glenn L. Martin Company created the Martin Marietta Corporation, a leader in aerospace, cement, aggregates, electronics and chemicals. 1940 1950 1960 1970 1980 1990 2000 2010 PROCESSING REQUEST...