Tectonic map of Liberia based on geophysical and geological surveys
Open-File Report
72-32
By: John Charles Behrendt and Cletus S. Wotorson
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Abstract
Interpretation of the results of aeromagnetic, total-gamma radioactivity, and gravity surveys combined with geologic data for Western Liberia from White and Leo (1969) and other geologic information allows the construction of a tectonic map of Liberia. The map approximately delineates the boundaries between the Liberian (ca. 2700 m.y.) province in the northwestern two-thirds of the country, the Eburnean (ca. 2000 m.y.) province in the south-eastern one-third, and the Pan-African (ca. 550 m.y.) province in the coastal area of the northwestern two-thirds of the country. Rock follation and tectonic structural features trend northeastward in the Liberian province, east-northeastward to north-northeastward in the Eburnean province, and northwestward in the Pan-African age province. Linear residual magnetic anomailes 20-80 km wide and 200-600 gammas in amplitude and following the northeast structural trend typical of the Liberian age province cross the entire country and extend into Sierra Leone and Ivory Coast.
Suggested Citation
Behrendt, J.C., and Wotorson, C.S., 1972, Tectonic map of Liberia based on geophysical and geological surveys: U.S. Geological Survey Open-File Report 72-32, iii, 78 p. :ill., maps ;27 cm., https://doi.org/10.3133/ofr7232.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Tectonic map of Liberia based on geophysical and geological surveys |
| Series title | Open-File Report |
| Series number | 72-32 |
| DOI | 10.3133/ofr7232 |
| Year Published | 1972 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | iii, 78 p. :ill., maps ;27 cm. |