The Canadian Shield is the largest landform region in Canada; it covers most of Canada and much of the United States. This region contains some of the oldest rocks in the world (3.96 billion years old).he Canadian Shield is the largest landform region in Canada; it covers most of Canada and much of the United States. This region contains some of the oldest rocks in the world (3.96 billion years old).
In the U.S., the half keg is considered as the most accepted size. The diameter of this keg ranges from 16.6 inches to 17.16 inches. In terms of height, the standard is 23.3 inches. It can hold as much as 15.5 gallons of liquid. When empty, it measures 29.7 pounds or 13.5 kilograms.
The standard American half-barrel beer keg holds 15.5 gallons. This is equal to 165 12-ounce servings, or 124 16-ounce servings. The American half-barrel keg is 23.3 inches tall with a diameter of 16.1 inches. It weighs 160.5 pounds when full, but only 29.7 pounds when empty.