Question

which type of soil was formed first?​

Answer 1

Answer:

Green Clay

Explanation:

These earliest soils were formed in an atmosphere with little or no oxygen and consisted of green clays. There would have been no organic matter in the soils and so the soils can be considered to be sterile. Gradually, but still some 400 million years ago, in the Devonian period, soils began to develop.

Answer 2

Answer:

These earliest soils were formed in an atmosphere with little or no oxygen and consisted of green clays. There would have been no organic matter in the soils and so the soils can be considered to be sterile. Gradually, but still some 400 million years ago, in the Devonian period, soils began to develop.