"The further we go back in time, the less rock and information we have. This is because Earth’s oldest rocks have undergone great changes over the past few billion years. Many of the oldest rocks have either been buried deep below the surface or altered in Earth’s hot interior due to high pressures and temperatures. As a result, layers of geology are often lost to erosion or metamorphism, making it increasingly difficult to find intact samples that provide insights into the early history of our planet. Consequently, our understanding of the Earth’s formative years relies heavily on a limited number of surviving rock formations and indirect evidence, such as meteorites and isotopic studies."
Finish the paragraph below by filling in the blanks:
"The further we go back in time, the less rock and
information we have. This is because Earth’s oldest rocks have undergone great changes over the past few
years. Many of the oldest rocks have either been buried deep below the surface or
in Earth’s hot interior."
1 answer