Copper, the oldest metal known to human beings, is found in ore deposits throughout the world, with the largest production occurring in Chile and the United States. Humans discovered copper about 10,000 years ago. It was first combined with tin to form the alloy bronze in about 3,000 B.C.Know More
In modern times, copper is used for everything from electrical wiring to car parts. It is a durable, yet malleable metal, which makes it useful in a wide range of applications. It is also an excellent conductor.
Chile produces about 20 percent of the world's copper, while the United States produces about 9 percent. Australia, Switzerland, the United Kingdom, Mexico and Poland are the other large copper producers.
One of the richest copper sources in the world is in Michigan. Long before white people settled in the area, Native Americans mined copper along Lake Superior and northern Michigan's Keweenaw Peninsula. The Native Americans used copper to make tools. Archaeological excavations have uncovered hammering stones used to work the copper the Indians mined.
While the Native Americans eventually abandoned their mines, American prospectors had excellent luck picking up where they left off in the same mines. For decades, copper mining was an integral part of Michigan's economy.Learn more about Geology
Mountains are found on every continent in the world. Though there are some single-standing mountains, they are most often found in groups known as mountain ranges. Some mountains arise from volcanic eruptions, while others have been formed by the shifting of tectonic plates. Thus, mountains are commonly seen at the intersection of tectonic plates and in places where the Earth's crust is relatively thin.Full Answer >
Jasper derives from quartz; the mineral is found throughout the world and is not commonly treated or enhanced when mined. Jasper is a beautiful mineral with captivating color patterns and formations. Although it can be solid in color, jasper is typically spotted, striped or ringed. Each jasper stone possesses a unique pattern or color scheme, making it one of the most unique gemstones.Full Answer >
Geodes are mostly found in deserts, volcanic ash beds and areas with limestone throughout the world. In the United States, common geode sites include Arizona, California, Iowa, Nevada and Utah. The most abundant geode sites in California are Riverside and Imperial counties.Full Answer >
Geographic diversity is a factor used by college admissions offices to recruit applicants from locations all over the United States and the rest of the world. The admissions staff sometimes offers attractive incentives for applicants from underrepresented areas.Full Answer >