Martin Marietta Aggregates Address: 133 Lawrence 208, Black Rock, AR 72415 Phone: (870) 878-6201 Stone-Crushed, Construction Sand & Gravel Other Businesses: 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 Martin Marietta Materials at 133 Lawrence 208, Black Rock, AR 72415