(Redirected from List of longest bridges in the world) This is a list of the world's longest bridges more than three kilometres long sorted by their full length above land or water. Span refers to the longest spans without any ground support. Note: There is no standard way to measure the total length of a bridge.
But the smaller crystals mean that the rest of the cooling happened very quickly. If a rock has both crystal types, it means that the mamga spent some time in a magma chamber, where the large crystals grew, then was violently erupted onto the surface, where the small crystals were formed.
IDEA: When magma cools, crystals form because the solution is super-saturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large. Some granites contain minerals which are up to one meter (3 ft) across!