The muscle may remain tender for up to 24 hours after a leg cramp. Leg cramps usually occur when you are resting-most commonly at night when in bed. (They are often called night cramps.) They may wake you. It can become a distressing condition if your sleep is regularly disturbed. leg cramp is a pain that comes from a leg muscle. It is due to a muscle spasm, which is when a muscle contracts too hard. It usually occurs in a calf muscle, below and behind a knee. The small muscles of the feet are sometimes affected.
In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core. A typical anticline is convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that dip away from the hinge.
Youngest rock on the ocean floor can be seen in divergent plate boundaries and hot spots. Tectonic plates are moving continuously. When two plates diverge to each other volcanic material erupt in the boundry. This liquid magma cools down and become solid magmatic rock. Such areas are called divergent boundary. If these two boundries are beneath an ocean than cooling process become faster. Such areas are called seafloor spreading. Atlantic mid oceanic ridge is the longest divergent boundary. Iceland is formed because of this process! Hot spots are also host the youngest rocks on Earth. Hawaii Islands are the well known examples of hot spots.