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An investigation was made of the occurrence of lineaments on air photographs in an area near Mpanda Western Tanganyika, Africa. A systematic analytical treatment was applied to these lineaments, various approaches being used, to see whether significant patterns or anomalies may be recognized.
Variations observed in the density of lineaments per unit area appear to be attributable mainly to variations in the thickness of the soil cover but in one or two areas, it is considered that there may be some structural significance in this variation.
The study showed that there is no simple regional lineament pattern in this part of Tanganyika, but that there are certain preferred lineament trends which appear to be related to Rift movements.
A similarity was observed between the lineament pattern in the basement and that in the overlying Bukoban sediments and also between the pattern in two areas of different structural history within the Bukoban. It is suggested that one possible explanation of this may be found in repeated movements along old lines of weakness. The similarity between the basement and Bukoban lineament patterns may alternatively be explained by a large percentage of lineaments observed in the basement representing fractures
of post-Bukoban age.
It was discovered that the preferred trends are apparent only in plots of fairly large areas. Plots of small areas show no clear patterns; hence, it was not possible to distinguish local anomalies in pattern.
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