Over Earth’s 4.5 billion-year history, tectonic upheavals and colliding plates formed mountain ranges and carved out basins. Forces of erosion and weathering have been at work to break down these landforms. Records of these processes are imprinted on the land and define distinctive landscapes around the United States and in its national parks.
Where would we be without petroleum? You can kiss lipstick goodbye!
Not only does petroleum provide fuel to run our vehicles, cook our food, heat our homes, and generate electricity, it is also used in plastics, medicines, food items, and countless other products, from aspirin to umbrellas and, yes — lipstick! We use many oil products as synthetic alternatives to natural materials, including synthetic rubber instead of natural rubber, and detergent instead of soap. Oil also gives us entirely new, unique materials such as nylon.
Earth processes such as volcanic eruptions, floods, landslides, and glaciers leave behind evidence of their passing in the form of layers known as deposits. By studying deposits of recent geologic events, geologists are able to better understand older deposits and identify the processes that caused them.