Strombolian - These eruptions are characterized by distinct blasts of basaltic to andesitic magma from the vent. 1  These blasts produce incandescent bombs that fall near the vent, eventually building a small cone of tephra (cinder cone). Sometimes lava flows erupt from vents low on the flanks of the small cones.
Use steel wool for a satin finish. The scratch pattern left by a gray abrasive pad on the top is more aggressive and uneven than that left by 0000 steel wool. you get a better surface by rubbing out the final coat with steel wool than with an abrasive pad.
Traditional Materials. Rock or mineral wool has been used for insulation since 1850. Rock wool uses waste slag from steel furnaces. Some rock wool contains limestone and basalt or diabase, another volcanic rock. Ingredients are heated and spun into fibers, chopped and blown between rafters in roofs and studs in walls.