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.
Carpal tunnel syndrome. Carpal tunnel syndrome can cause your hands to fall asleep at night and make you wake up with numb hands. Carpal tunnel syndrome is caused when pressure on the median nerve in your wrist which results in numbness, tingling, and weakness in your hand.