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.
Conglomerate /kÉÅËÉ¡lÉmÉrÉ¨t/ is a coarse-grained clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts, e.g., granules, pebbles, cobbles, and boulders, larger than 2 mm (0.079 in) in diameter.Conglomerates form by the consolidation and lithification of gravel.he size and composition of the gravel-size fraction of a conglomerate may or may not vary in composition, sorting, and size. In some conglomerates, the gravel-size class consist almost entirely of what were clay clasts at the time of deposition.