Muscle spasms in the legs are quite common and usually present themselves in the calves, just below the back of the knee. Pain during a muscle spasm can range from mild to severe, and can last up to 10 minutes.ack Muscle Spasms. Many times back spasms are the result of inflammation or soreness of a particular muscle in the back due to sudden movement at an incorrect angle. Muscle spasms in the back are quite common, even over-straining the back muscles while completing household chores can cause spasms.
Denoting rocks composed of broken pieces of older rocks: a group of clastic sediments such as conglomerates. More example sentences. 1  Mechanical deposition, by water or wind, produces clastic rocks composed of broken fragments, generally of silicate minerals and small pieces of rock: sandstones and conglomerates. In contrast, the Cambrian clastic rocks are characterized by a paucity of these zircons, suggesting a significant difference between Neoproterozoic and Cambrian drainage systems.
Clastic sedimentary rocks. The fragments of pre-existing rocks or minerals that make up a sedimentary rock are called clasts. Sedimentary rocks made up of clasts are called clastic (clastic indicates that particles have been broken and transported).Clastic sedimentary rocks are primarily classified on the size of their clasts.Clast size in clastic rocks.edimentary rocks made up of clasts are called clastic (clastic indicates that particles have been broken and transported). Clastic sedimentary rocks are primarily classified on the size of their clasts.