Question

How do rocks provide a history of the Earth?

Answer 1

Hint:The Earth history can be studied by the past events that are conserved in the rocks. Most rocks that are exposed to the surface of the Earth are called sedimentary which are formed by the older rock particles.

Complete answer:
The Earth’s oldest rock is 4.3 billion year. The old greenstone beds are found in the eastern shore of Hudson Bay in northern Quebec. Rocks are considered to be the substance of the Earth.
The rocks and sediments indicate the past geological process as well the environment process that took place over the time. The igneous rocks are created by tectonic activity as well as post volcanic activity. The metamorphic rocks are created by the sediments due to intense heat and pressure which provide important information about events in mountain building and geologists use this to find the extent of the mountains which are now vanished. Sedimentary gives information about the history of Earth such as mountain ranges, river systems that were transported by sediments as well final environment in which the sediments collect and lithified.
The presence of fossils and sedimentary layers of rock help to understand the sediments that are deposited. The past geological processes tell us about the landscape as well as the structure of geologic.

Note:The Earth history can be studied by the past events that are conserved in the rocks. Most rocks that are exposed in the surface of the Earth are called sedimentary which are formed by the older rock particle. The rocks and sediments indicate the past geological process as well the environment process that took place over the time.