101 Rock ballast is red cinder for any railroad that uses red ballast cinder for the railroad.
1010 Red Cinder Powder
1011 Red Cinder N Scale Ballast
1012 Red Cinder HO Scale Ballast
1013 Red Cinder Large “O” Scale Ballast
1014 Red Cinder Rock “G” Scale Ballast
1015 Red Cinder Large Rocks
1017 Red Cinder Large Boulders
Track ballast forms the trackbed upon which railroad ties (sleepers) are laid. It is packed between, below, and around the ties. It is used to bear the load from the railroad ties, to facilitate drainage of water, and to keep down vegetation that might interfere with the track structure. The ballast also holds the track in place as the trains roll over it. It consists of crushed stone. The term “ballast” comes from a nautical term for the stones used to stabilize a ship.