Aniwetalu, Emmanuel U. and Akakuru, Obinna (2015) Granomeric Analysis of Mamu Formation and Enugu Shale around Ozalla and Its Environs; Evidence from Field Study. Journal of Applied Geology and Geophysics, 3 (2). pp. 19-26. ISSN 2321–0990
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Abstract
The study area lies within the Anambra Basin which geologically made up of Enugu Shale and Mamu Formation. This study aimed at determining the geology and depositional environments of these Formations through field relationship and grain size distribution as well as morphometric studies. The field data shows Enugu Shale as fissile, light grey with extraformational clast which graded into Mamu Formation which is made up of alternating sequence of shale, siltstone, mudstone, coal and sand, it shows a fluctuating environment. The granulometric study of sand member of Mamu Formation shows characteristic very well sorted, fine to medium grains which were deposited in relatively turbulent well aerated marine environment probably above wave base. The bivariate and the multivariate results reveal Aeolian/shallow marine deposit. The fissility of Enugu Shale suggests that it was deposited in low energy environment, distal to proximal lagoon environment and the presence of extraformatonal clast indicates fluvial incursion. However, it can be concluded that Mamu Formation was deposited in fluctuating environment ranging from an oxygenated shallow marine to acidic swampy environment. Hence is paralic Formation.
| Item Type: | Article |
|---|---|
| Subjects: | L Education > L Education (General) Q Science > Q Science (General) |
| Divisions: | Faculty of Natural and Applied Sciences |
| Depositing User: | miss ifeoma agbo |
| Date Deposited: | 03 Jun 2019 12:13 |
| Last Modified: | 03 Jun 2019 12:13 |
| URI: | http://eprints.gouni.edu.ng/id/eprint/1650 |
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