Benue Valley - Bouguer gravity contours : Geological survey of Nigeria 1:500,000 /
Great Britain.Directorate of Overseas Surveys.
Cratchley, C. R.
[Tolworth, Surrey] : The Directorate,
1962.
"Gravity information compiled from measurements and computations carried out during 1960-61 by C.R. Cratchley."
Relief shown by spot heights.
Includes reliability diagram, magnetic variation diagrams and grid belt designation.
To accompany: An interpretation of the geology and gravity anomalies of the Benue Valley, Nigeria. (Overseas geological surveys geophysical paper no. 1)
Gravity