Textural Analysis, Erodibility Index Analysis and Hydro Network Pattern Delineation of Eocene Strata, South-Eastern Nigeria
eocene strata, nanka sandstone, niger delta, textural analyses, erodibility index analysis (EIA), erodibility tendency (ET), hydro network pattern (HN
Abstract
Detailed field based studies were carried out on Eocene Strata of Nanka Sandstone, unit of Niger Delta. Textural analyses were carried out on twenty-one samples of the rock collected from various units across the study area. Gradistat v.8.0 was used to analyze the data obtained for sieve analysis. TRI-PLOT v. 1-4-2 was used to analyze the data obtained for pebble morphometry. The sieve analysis data were also subjected to the Erodibility Index Analysis (EIA) to estimate Erodibility Tendency (ET). By manual delineation, and the use of ArcGIS, the Hydro Network Pattern (HNP) was carried out. A reflection of a predominant shallow marine depositional environment controlled by tidal influence with its corresponding stratigraphy was observed. Very severe Erodibility Tendency (ET) was predicted based on very high values of Soil Loss (R) through the calculated erodibility indices, direct heavy raindrop impact on the sediments and the Hydro Network Pattern (HNP) which favor intense erosion of the study area. The criticality of this intense accelerated erosion is being factored by the friability and very high sand to clay ratio of Nanka Formation.
Downloads
How to Cite
References
I Arua, V Rao (1986) New stratigraphic data on the Eocene Ameki Formation, southeastern Nigeria. 6(4), 391-397.
I Arua (1990) The trace fossil Teredolites longissimus in calcareous concretions from the Eocene Ameki formation, southeastern Nigeria. 12(4), 605-608.
G Bouyoucos (1935) The clay ratio as a criterion of susceptibility of soils to erosion. 27(9), 738-741.
T Chinatu (2007) Relative Efficiencies of Erosivity Indices in Soil Loss Prediction in Southeatern Nigeria. (6), 1012-1015.
Chiaghanam, O.I, Chiadikobi K.C, Ikegwuonu, O.N, Omoboriowo, A.O (2014) Palynology, Source Rock Potential and Thermal Maturity of Eocene Nanka Formation (Ameki Group) In Anambra Basin: An Investigation of Agulu Lake, South-Eastern Nigeria. 2(5), 87-97.
J Dobkins, R Folk (1970) Shape Development on the Tahifi-mi. 40, 1167-1203.
O Ekwenye, G Nichols, A Mode (2014) Sedimentary petrology and provenance interpretation of the sandstone lithofacies of the Paleogene strata, south-eastern Nigeria. 109, 239-262.
O Ekwenye, G Nichols, C Okogbue, A Mode (2016) Trace fossil assemblages in the tide-dominated estuarine system: Ameki Group, south-eastern Nigeria. 118, 284-300.
R Folk, W Ward (1957) Brazos River bar, a study in the significance of grain size parameters. 27, 3-27.
R Folk (1974) Petrology of Sedimentary Rocks. 182.
N Hudson (1995) Soil Conservation.
G Lutting (1962) The Shape of pebbles in the Continental Fluviatile and Marine Facies. 59, 253-258.
E Nwabineli, V Otti (2012) Environmental Effects of Gully Erosion in Nigeria: Case Study of Nanka Community, Orumba North, L.G.A of Anambra State. 1(2).
C Nwajide (1980) Eocene tidal sedimentation in the Anambra basin, Southern Nigeria. 25(3), 189-207.
I Obi, A Mode (2013) Paleocurrent analysis as tool for reservoir property estimation: a case study of Eocene outcrops in Southeastern Nigeria. 4(1), 137-152.
I Obiadi, A Onwuemesi, O Anike, N Ajaegwu, E Anakwuba, C Nwosu, E Akpunonu, E Onuigbo, O Onuba (2011) Determining Subsurface Fracture Characteristics from the Azimuthal Square Array Resistivity Survey at Igarra, Nigeria. 170(5), 907-916.
C Ali, T Ejiofor, F Ifeanyieze, A Okadi, C Eze, G Eze, F Onah, T Nwakile, C Ugwuoke, R Mgbenka, O Onah, C Nwachukwu, F Ezebuiro, B Omeje, L Ekenta, E Ogbonna (2014) Proximate qualities and lycopene contents of three watermelon (Citrullus lanatus) fruit varieties grown with climate-smart integrated fertilizer management in sandy loam soil. 20(07), 16997-17011.
C Osadebe, T Abam, F Obiora, R Sani (2014) Evaluating the Stability of Gully Walls in Agulu-Nankaoko Gully Erosion Complex Area of Anambra State, Nigeria, using Empirical Approach. 2(1), 1-9.
F Pettijohn (1957) Sedimentary Rocks. 718.
E Roose (1977) Application of the universal Soil Loss equation of Wischmeier and Smith in West Africa.
B Sahu (1964) Depositional mechanism from the size analysis of elastic sediments. 34, 73-83.
C Sames (1966) Morphometric data of some recent pebble associations and their application to ancient deposits. 36, 126-142.
Shell-Bp (1957) Unknown Title. 1, 0-73.
K Short, A Stauble (1967) Outline of geology of Niger Delta. 51, 761-e779.
Edmund Sneed, Robert Folk (1958) Pebbles in the Lower Colorado River, Texas a Study in Particle Morphogenesis. 66(2), 114-150.
G Visher (1969) Grain size distributions and depositional processes. 39, 1074-1106.
Published
2018-03-05
Issue
Section
License
Copyright (c) 2018 Authors and Global Journals Private Limited
This work is licensed under a Creative Commons Attribution 4.0 International License.