Sandstone: Rock for Crack Climbing. Sandstone is a sedimentary rock, a rock type that encompasses a wide variety of characteristics and is deposited directly on the earthâs surface. Roughly 75% of the earthâs land surface is covered with some type of sedimentary rock. Sedimentary rocks like sandstone form when minute rock particles, often from granite, are deposited by wind and water on earth surfaces.
8. 1  Other Causes. 2  Diabetes causes arms or hands and feet to fall asleep even when one is awake and relaxed. 3  Hand surgery and arthritis damage or irritate the nerves.
It sounds like it could be an entrapped nerve. I have one in my thigh, that causes my right leg to fall asleep when I am standing, walking or laying down. You can see a doctor to have a test performed to determine where the entrapment is. Its a simple test, use small pins (you don't feel them) to send currents through your nerves and track the responses.