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 keg sizes in the United States are 1/2 keg, 1/4 keg and 1/6 keg. A 1/2 keg holds just under 59 liters of beer and yields about the equivalent of 165 12-ounce bottles of beer. A 1/4 keg holds just over 29 gallons of beer and produces the equivalent to about 82 12-ounce bottles. A 1/6 keg, which is the closest standard keg size to the mini keg, is still somewhat larger, holding about 19 liters of beer and yielding about 54 12-ounce bottles.