Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
The correct option is LOESS.
Loess refers to a compacted yellowish deposit of wind blown sediments which is usually found extensively in the mid latitudes. Loess is formed by the accumulation of dust that had been blown by the wind. Scientists believed that about 10% of the earth's land area is covered by loess.<span />
Answer:
ainda nao estudei isso mas quando eu estudar eurespondo
Because the hanging wall moves up relative to the foot wall, most of these faults place older rocks over younger rocks.<span />
Answer:
Explanation:
Horses allowed Native Americans to travel to find food and other supplies. Horses also helped strengthen military power. Horses were not the only animals making a large impact on the Americas.
