Reference soil Indonesia 10: Regosol
Regosols are found in areas where soil has been eroded to the extent that the underlying unconsolidated materials come near to the surface, or where soil formation has not played an important role, e.g. in desert regions. The name comes from the greek 'rhegos' :blanket meaning young soils on weathering materials.
Characteristics
Soils in medium and fine textured materials, having no distinctive horizons other than an ochric horizon at the surface.
Reference soil ID010: Regosols
LOCATION: Gunung Leuser National Park. PHYSIOGRAPHY: plateau is dissected by a small river. CLIMATE: the mean annual temperature at site can be estimated to be 9 °C. PARENT MATERIAL/ROCK: mixture of residual material Kemiri serie (regressive sediments, kaolinite, halloysite and gibbsite mixture) and weathered material from rock formations consisting of silt and sandstone, over Kemiri serie at 15 cm depth. VEGETATION: "blang vegetation", subalpine zone. ADDITIONAL NOTES ON PROFILE DESCRIPTION: O - overlain by litter layer. Ah - in lower part leached grains. 2BC - colour tends to 7.5YR 6/8; in the lower part Fe oxiden are concentrated in a dipping sedimentation layer. 2C - with some more clayey and sandy layers. Only a little bit of the O horizon is left on the soil monolith. REFERENCES: - Van Beek, 1982. Een geomorfologische bodemkundige studie van het Gunung Leuser nationale park, Noord Sumatra, Indonesie (in Dutch). Utrechtse geografische studies 26. Geografisch instituut, Rijksuniversiteit Utrecht, the Netherlands.