TRANSVERSE CONTRACTION JOINTS. The primary purpose of transverse contraction joints is to control the cracking that results from the tensile and bending stresses in concrete slabs caused by the cement hydration process, traffic loadings, and the environment.
Diamonds are found in igneous rock which is brought to the surface of the earth by volcanic eruptions bringing magma to the surface. Diamond itself is strictly an allotrope of the element carbon, a mineral, one form of crystal that can be created from carbon.
Rockhound. The two major properties used to classify igneous rock are: Crystal Size/Texture --Small crystals are indicative of rapid above ground cooling of lava into what is classified as extrusive igneous rock such as basalt, obsidian, or rhyolite.ockhound. The two major properties used to classify igneous rock are: Crystal Size/Texture --Small crystals are indicative of rapid above ground cooling of lava into what is classified as extrusive igneous rock such as basalt, obsidian, or rhyolite.