[Solved] The most well-known developer and publisher of games for mobile devices is ______. A) Rovio B) Ubisoft C) Sega D) Zynga E) Electronic Arts Columnar Joints: Natural formations resulting from the cooling and cracking of volcanic rock into nearly hexagonal columns. Finely Crystalline: Describes a rock texture that consists of small, closely-packed crystals not easily visible to the naked eye. Calcite: A common mineral form of calcium carbonate, critical in the formation of limestone and marble, and involved in many geological processes. Metamorphosed Fossils: Fossils that have undergone metamorphism, altering their original form and composition due to heat and pressure.