Martin Marietta Materials Address: 133 Lawrence 208, Black Rock, AR 72415 Phone: (870) 878-6238 General Merchandise Retail, Stone-Crushed Other Businesses: Martin Marietta Aggregates at 133 Lawrence 208, Black Rock, AR 72415 Black Rock Fire Dept at 370 Elm St, Black Rock, AR 72415 Black Rock High School at 207 N Saint Joseph St, Black Rock, AR 72415 BLACK ROCK EXPRESS at 3634 HIGHWAY 63, BLACK ROCK, AR 72415