About 75% of the rock outcroppings on continents are sedimentary rocks. Detrital sedimentary rocks are those for which the material has been transported as solid particles. The particles themselves may have derived from either physical weathering or chemical weathering. Sedimentation means settling from a fluid, either water or air.
An anesthesiologist is a medical doctor who keeps a patient comfortable, safe and pain-free during surgery by administering local or general anesthetic.
The anesthesiologist is a doctor who administers the medication that puts you to sleep during the surgery or who gives you local or spinal anesthesia. He or she will talk with you before your surgery and will decide which type of anesthetic is best for you.