Its called ballast, and its to allow (rapid) drainage .
these have small stones under them so that the rails will not bend, also when it rains these rails wont sink in the mud and the water will filter through them.
Usually kidney stones. Kidney stones are small pieces of calcium which, if small enough can travel down the urethra - and possibly cause a blockage.
No, rocks and stones are not the same thing. Rocks are made up of one or more minerals, while stones are small pieces of rock.
Rocks are made up of one or more minerals, while stones are small pieces of rock.
An ultrasound can help discover kidney stones. The technician will place the ultrasound wand over your kidney area and any stones that are present will be visible on the screen.
To help protect the vehicle and other vehicles behind you from flying mud and small stones.
No, stones and rocks are not the same thing. Rocks are naturally occurring solid aggregates of minerals, while stones are small pieces of rock that have been shaped or smoothed by natural processes like erosion or human activities.
Chestnuts need small stones to get rid of the germs as the small stones are not normal stones.
They are there to allow for the expansion of the rails during hot weather.
Large and small jewelry stores sell loose diamonds, as do design houses that deal in custom pieces. Some larger pawn shops will purchase loose diamonds, provided the source legitimate and traceable, and subsequently sells those stones.
Sedimentary rocks are extremely common. Many use them in small, thin pieces to make stepping stones across their yards.
That is called a mosaic. Mosaics are created by arranging and sticking small pieces of colored materials, such as glass, tiles, or stones, onto a surface to create a unique image or pattern.