The volcanic creation of the Canadian Shield took place during the Earthâs earliest geologic era, the Precambrian, which includes the earliest 80% of Earthâs existence. The Precambrian era ranges from about 5 billion to 570 million years ago.This process continues today in such places as Hawaii.he volcanic creation of the Canadian Shield took place during the Earthâs earliest geologic era, the Precambrian, which includes the earliest 80% of Earthâs existence. The Precambrian era ranges from about 5 billion to 570 million years ago.
608 STANDARD. The most common bearing size is the â608.â Characterized by an 8mm core, a 22mm outer diameter and a 7mm width, these bearings are the industry standard and match up with nearly every skate wheel out there. NON-STANDARD Of course, there are exceptions to every rule.
22â Penny Skateboard. The first and original 22â Penny Skateboard is a quick and nimble ride thatâs perfect for getting from place to place quickly and with no fuss at all. Our 22â Penny is a great size for skaters looking for easy transportation and fits perfectly in our Penny Pouch Backpacks when youâre not skating. Itâs also great for those younger Penny riders who are on the smaller side.