quarry rock within bastrop la
quarry rock within bastrop la. RC1606A Assessment of Aggregate Sources in Michigan for . uses a much lower LA Abrasion limit of 9 to 10% for basalt and 14 to 23% for carbonate rock. The MDOT LA Abrasion specification of 40% allows approximately 70% of the carbonate sources in Michigan and the surrounding states to be used on MDOT railroad lines.