What soil horizon can we find minerals like copper and iron?

The B horizon is commonly referred to as "subsoil" and consists of mineral layers which are significantly altered by pedogenesis, mostly with the formation of iron oxides and clay minerals.

Explanation:

The B horizon is commonly referred to as "subsoil" and consists of mineral layers which are significantly altered by pedogenesis, mostly with the formation of iron oxides and clay minerals.

C - (parent material) The deposit at Earth's surface from which the soil developed. R - (bedrock) A mass of rock such as granite, basalt, quartzite, limestone or sandstone that forms the parent material for some soils – if the bedrock is close enough to the surface to weather.

Explanation:

O (humus or organic): Mostly organic matter such as decomposing leaves. The O horizon is thin in some soils, thick in others, and not present at all in others.

A (topsoil): Mostly minerals from parent material with organic matter incorporated. A good material for plants and other organisms to live.

E (eluviated): Leached of clay, minerals, and organic matter, leaving a concentration of sand and silt particles of quartz or other resistant materials – missing in some soils but often found in older soils and forest soils.

B (subsoil): Rich in minerals that leached (moved down) from the A or E horizons and accumulated here.

C (parent material): The deposit at Earth’s surface from which the soil developed.

R (bedrock): A mass of rock such as granite, basalt, quartzite, limestone or sandstone that forms the parent material for some soils – if the bedrock is close enough to the surface to weather. This is not soil and is located under the C horizon.

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