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.
Rock B is a dark-colored crystalline rock that formed when a lava flow cooled and solidified quickly on the surface of Earth. Rock B is classified as an. (1) extrusive igneous rock with a coarse texture and felsic composition. (2) extrusive igneous rock with a fine texture and a mafic composition. (3) intrusive igneous rock with a coarse texture and a felsic composition. (4) intrusive igneous rock with a fine texture and a mafic composition. 13.