Kōrero: Soils

Coloured soils

Coloured soils

Bright orange or red subsoils are the result of a long period of wetting and drying of iron compounds that causes them to oxidise or ‘rust’. In the topsoil, these colours are masked by dark organic matter from decomposed plant and microbial material. This yellow-brown subsoil from Karori Road, Wellington, could have formed in the present climate. However, the lower pink-red horizon, which appears to have been buried by the surface material, would have required a more tropical climate to develop. It may be up to 500,000 years old.

Te whakamahi i tēnei tūemi

Te Ara - The Encyclopedia of New Zealand
Photograph by Alastair McLean

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Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Allan Hewitt, 'Soils - Soil features', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/12272/coloured-soils (accessed 18 January 2022)

He kōrero nā Allan Hewitt, i tāngia i te 24 Sep 2007