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.
| 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 |
| Edition | - |
| Year Published | 1972 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | iii, 78 p. :ill., maps ;27 cm. |
| Google Analytic Metrics | Metrics page |