Dirt and clay and most other soil types. When first decayed, these substances are high in minerals, and a cycle will continue if an environement is left alone, because decaying plants refertilize soil.
It is called humus.humus
It is called humus.humus
Humus.
The organic material formed in soil from the decayed remains of plants and animals is called humus. Humus is rich in nutrients and helps improve soil structure and fertility.
fossil
fuels
Dead Animals and plants?
Five
there were plants , small marine animals, they were decayed and became oil
Plants which died and decayed and were buried by later material.
Dead and decayed remains of plants and animals, called Humus.
bugs and leaves and ylime