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Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Ramakrishna, T. L.

Geological Parameters in Water Shed Development

Teaching of Geo-Environmental Education in Schools through Audio-Visual Aids

Standardisation of the Nomenclature of Commercial Dimension Stones

Pictorial, Colour Coded Geological and Mineral Map of Karnataka

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Authors

T. L. Ramakrishna ¹

Affiliations
1 Flat No. 228, I Block, Ushas Apartments, 4th T Block, Jayanagar, Bangalore - 560 011, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 2 (2002), Pagination: 199-202

Abstract

Geological and mineral maps in India are prepared using 1: 63,360 or 1:50,000 or 1:25,000 scale topographic maps prepared by the Survey of India as base. These are later compiled into smaller scales like 1 :250,000 or 1:500,000 or 1 : 1 ,000,000 (commonly referred to as quarter million, half million or one million maps respectively) or larger scales depending on the need. These various scales represent the ratio of ground distances to those on the maps. The scale to be adopted depends upon the coverage or depth of details required. Geological maps show the spatial distribution of the various rock formations, their characteristics, as also the associated mineral occurrences or deposits on the respective topographic maps or topo sheets using standard colours and character symbols, as indicated in the legends accompanying these maps. Such maps while serving the professional geological needs represent just a flash of colours to the common man or a student. Of late there has been a lack of interest and appreciation of the wonderful branch of science, geology, among the upwardly mobile youth. Only a few take up geology for their graduate or post graduate studies and still less choose it for a career. At primary and secondary. schools, the subject is almost unheard of. This situation is mainly due to lack of understandable information about the nature of the subject, its glamour and its inevitable utility in location of mineral deposits and interpreting the natural history of the geoenvironment. The pictorial colour coded geological and mineral map (Fig. 1) is a determined first step in reversing this disturbing trend of lack of interest in understanding the geoenvironment.

Keywords

Colour Coded Maps, Geology, Mineral Resources, Karnataka.

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