(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.
Then, before any more crystals can form, the magma will find a break in the crust and rush towards the surface. Here, the pressure and temperature are too low to allow crystallization. Instead, the rest of the magma cools into fine-grained rocks, with the original crystals distributed through out the interior. These are called phenocrysts. Corundum, moonstone, garnet, and zircon are often found as phenocrysts.