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.
Causes of Hands Fall Asleep While Sleeping. 1. Sleeping on Your Hand for Long. You are likely to experience a tingling arm or hand if you sleep on it for a long period. Your body weight will exert pressure on your nerves and disrupt the circulation of blood to your arm.