Title

Palynological Interpretation of the Palaeoenvironments of Miocene Strata of the Well Igbomotoru-1, Niger Delta

Abstract

Palynological and lithological results have been employed in interpreting the depositional environment of strata penetrated by the Igbomotoru-1 well at the interval 1123-3583 metres. The environment of deposition is largely transitional with marine influence occurring only at the base of the studied sequence. Zonocostites ramonae is frequent to abundant in most samples: this indicates a high influence of mangrove swamp vegetation in the environment at the time of deposition. The absence or rarity of this species at some horizons within the studied interval is taken as evidence of deposition in a more continental environment or of a swamp forest area composed of non-Rhizophora type trees. The nature of the organic matter points to a source area near the basin of deposition for the sediments.

Department(s)

Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

depositional environment; mangrove swamp; Miocene; palynology; Nigeria, Niger Delta; Igbomotoru

Geographic Coverage

Niger

Time Period

Miocene

International Standard Serial Number (ISSN)

0262821X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1992 Geological Society of London, All rights reserved.

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