Relation Ship Sbetween Geology, Mor Phology and Soil Associations of Bichena Area ( S. E. GOJAM )
| dc.contributor.author | Ayalew, Teklewold | |
| dc.date.accessioned | 2018-07-11T06:43:21Z | |
| dc.date.accessioned | 2023-11-09T14:09:41Z | |
| dc.date.available | 2018-07-11T06:43:21Z | |
| dc.date.available | 2023-11-09T14:09:41Z | |
| dc.date.issued | 1981-10 | |
| dc.description.abstract | The study investigates the extent of influence of the geolog- ical history , essentially parent rock * topography and time , on soil formation and distribution in Bichena , Southeastern Gojjam * Lithostratigraphy of the Mesozoic sedimentary sequence and Cenozoic volcanics is described * An attempt has been made to reconstruct the morphologic evolution of the area * Four soil mapping units in close relationship with the parent material and geomorphology have been differentiated: Vertisol, Mollisol, Alfisol and Entisol Orders 0 The soils are found to assume different states when the above considered soil forming factors are changed * The vertisol development from aphanitic basalts is determined by the evolution of the structural plateau geomorphic surface through lateral planation, which has allowed for two cycles of pedogenesis* The Mollisols have developed from porphyritic plagio- clase-Olivine basalt* These indicate that soil parent materials with similar mineralogy give way to soil varieties * A lateral variat- ion in some soil properties of the Mollisol order is found to be strongly explained in terms of the slope gradient * The study shows that the Plio-Pleistocene neotectonic uplift and subsequent develop- ment of a deep canyon including morphogenetic threshold slopes has resulted in lack of sufficient time for pedogenic horizons to develop in Alfisols and Entisols * | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/7801 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa Universty | en_US |
| dc.subject | Bichena | en_US |
| dc.title | Relation Ship Sbetween Geology, Mor Phology and Soil Associations of Bichena Area ( S. E. GOJAM ) | en_US |
| dc.type | Thesis | en_US |