Lithofacies, palynofacies, and sequence stratigraphy of Palaeogene strata in Southeastern Nigeria

Oboh‐Ikuenobe, Francisca E.; Chuks, Gordian; Jaramillo, Carlos

doi:10.1016/j.jafrearsci.2005.02.002

Cited by 118 publications

(65 citation statements)

References 49 publications

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“…The dominant rock types in Enugu area are sandstone siltstone and shale ( Figure 6) that range from the Campanian to the Eocene in age and were deposited in environments that pass from continental in the proximal parts through paralic to shallow marine in the distal parts (Kogbe, 1989;Oboh et al 2005). The oldest deposits with the Anambra basin belong to the Campanian Nkporo Group composed of the diachronous Enugu Shale formation, Nkporo shale formation and the Owelli Sandstone formation.…”

Section: Site Characteristics Geologymentioning

confidence: 99%

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

Igwe

2015

GEOENVIRON DISASTERS

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Background: Landslides in Nigeria occur in various forms and vary in mode, scale and frequency. The variations appear to be significantly controlled by geologic setting, hence the need to study in detail the distinctive features that differentiate landslides in sedimentary environments from those on metamorphic localities. The aim is to understand the actual features impacted on the landslides by geology, from which future predictions of occurrence and identification of instability could be based. The recognition of features that are characteristic of certain geologic setting may be a major step in early warning development in Nigeria. To achieve the objectives detailed mapping of the study area was carried out using topographic maps, aerial photographs and multiple field surveys.

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Section: Site Characteristics Geologymentioning

confidence: 99%

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

Igwe

2015

GEOENVIRON DISASTERS

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“…Anambra basin is more or less triangular shaped depression covering an area of about 30,000 km 2 extending southward from an area just below the confluence of River Niger and River Benue (Offodile 2014). The folding and uplift of Abakaliki region during the Aptian-Santonian has been linked with the evolution of the basin which resulted in the partitioning of the depocentre into Afikpo region and Anambra platform (Oboh-Ikuenobe et al 2005). Before the folding and uplift event, the lithologies in Abakaliki area are the Asu River Group, Eze Aku Group and Agbani Sandstone/Awgu Shale.…”

Section: Geology and Hydrogeology Of The Study Areamentioning

confidence: 99%

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

Fagbohun¹,

Olabode²,

Adebola³

et al. 2017

Contemporary Trends in Geoscience

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Identifying landscapes having comparable hydrological characteristics is valuable for the determination of dominant runoff process (DRP) and prediction of flood. Several approaches used for DRP-mapping vary in relation to data and time requirement. Manual approaches which are based on field investigation and expert knowledge are time demanding and difficult to implement at regional scale. Automatic GIS-based approach on the other hand require simplification of data but is easier to implement and it is applicable on a regional scale.In this study, GIS-based automated approach was used to identify the DRPs in Anambra area. The result showed that Hortonian overland flow (HOF) has the highest coverage of 1508.3 km 2 (33.5%) followed by deep percolation (DP) with coverage of 1455.3 km 2 (32.3%). Subsurface flow (SSF) is the third dominant runoff process covering 920.6 km 2 (20.4%) while saturated overland flow (SOF) covers the least area of 618.4 km 2 (13.7%) of the study area. The result reveal that considerable amount of precipitated water would be infiltrated into the subsurface through deep percolation process contributing to groundwater recharge in the study area. However, it is envisaged that HOF and SOF will continue to increase due to the continuous expansion of builtup area. With the expected increase in HOF and SOF, and the change in rainfall pattern associated with perpetual problem of climate change, it is paramount that groundwater conservation practices should be considered to ensure continued sustainable utilization of groundwater in the study area.

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“…[45] suggested that the sediments were deposited in shallow marine environments, where water depths range between 10 to 100 meters. However, [46], interpreted the depositional environment of the Ameki Group as estuarine, lagoonal, and open marine, based on the faunal content. The Ameki Formation shows steeper dips than the overlying Ogwashi-Asaba Formation, indicative of an unconformable relationship.…”

Section: Fig 4 Base-level and Transgressive-regressive (T-r) Curvesmentioning

confidence: 99%

The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

Kelechi

2017

JGEESI

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A review of high impact literature on the Southern Benue Trough and Anambra Basin was undertaken to enhance the understanding and definition of the basins in terms of their evolution, area extent, sedimentation history, as well as their litho-bio-and sequence stratigraphy. Early works of [1,2,3,4], and others, which formed the basis for the stratigraphic study of these basins were employed, but were updated by recent reputable works of [5,6,7,8,9,10] and others. The geologic formations encountered in the basins include: the Asu River Group, Eze-Aku Group, Agbani Sandstone/Awgu Shale Formation, Nkporo Group, Mamu, Ajalli, Nsukka, Imo, Ameki and Ogwashi-Asaba Formations. Controversy surrounding the stratigraphy of the Anambra Basin, depositional environments and conditions, and age of geologic formations present in the study basins were considered. The aspect of sequence stratigraphy requires more work for a more accurate definition of stratigraphic surfaces required for the establishment of systems tracts and sequences.

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Lithofacies, palynofacies, and sequence stratigraphy of Palaeogene strata in Southeastern Nigeria

Cited by 118 publications

References 49 publications

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

The geotechnical characteristics of landslides on the sedimentary and metamorphic terrains of South-East Nigeria, West Africa

GIS-Based Sub-Basin Scale Identification of Dominant Runoff Processes for Soil and Water Management in Anambra Area of Nigeria

The Southern Benue trough and Anambra Basin, Southeastern Nigeria: A Stratigraphic Review

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