Ans: An earthquake is caused by a sudden slip on a fault. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slips suddenly, releasing energy in waves that travel through the earth's crust and cause the shaking that we feel during an earthquake.ns: Earthquakes occur on faults-strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults, and thrust earthquakes occur on thrust or reverse faults. When an earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other.
Geodes are found throughout the world, and many are concentrated in deserts. Volcanic areas are a common place to find geodes. In the United States they can be found in California, Arizona, Utah, Nevada, Illinois, Missouri, Kentucky, and Iowa.In fact, the geode is Iowa's state rock. You can buy a small 2-inch geode for a couple of dollars. Large geodes with amethyst crystals can be worth $1,000.itaba birds are not real, but geodes are real rocks. Geodes are rocks that are plain on the outside but can have beautiful crystals on the inside. In the Greek language, geode means shape of the earth, and geodes are round like earth or oblong like an egg. They can be a couple inches or several feet in size.
Geode State Park has been a traditional favorite for locals as well as out-of-state visitors. The park is named after the state rock which is frequently found in the area. Geodes bring rock hounds to the local area in search of this elusive prize. A display of geodes, with mysterious crystal formations in their hollow cavities, can be seen at the park office.