INKA005

Button Rock

Oceanic Island

Karnataka State

Arabian Sea  (This submerged island, located behind Arge Island, is at a distance of about 2.86 km from the Karwar Port in Uttara Kannada district)

14°43'30.00"N
74°8'55.68"E

0.00283 sq.km

Less than 2 sq.km

Rocky

0 m (Data extracted from Google earth)

The soil of Uttara Kannada district is mostly lateritic type, and is distributed in the pediplain area. It is characterised by high iron and aluminium content. It is mostly red in colour, though yellow loamy, pale to bright red colours are also seen. The major soil types are (i) hilly soil (ii) lateritic (iii) loamy and (iv) semi-black cotton (Source: CGWB Report, 2006)

The major water bearing formations of Uttara Kannada includes- i) Shallow aquifers of alluvium along the stream courses, along coast, creeks, weathered zones of schists, metasedimentaries and metavolcanics occurring between the depths of 3 to 20 mbgl (ii) Deeper aquifers of fractured and jointed schists, gneisses and metavolacanics and meta sedimentaries up to 200 mbgl Net annual ground water availability is 70765 (ham)

The water bearing formations are weathered & fractured Gneiss, Schist & Granite and alluvium. The water level during pre-monsoon is 1.85 mbgl to 15.17 mbgl & during post-monsoon is 1.65 mbgl to 9.40 mbgl. Nitrate occurs more than permissible limit which is around 140ppm. The water type is Ca - Mg bicarbonate to Na Chloride (Source: CGWB Report, 2006)