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Iodine deficiency is an important global health problem. 8 person out of every hundred, suffer from goiter in India. by Dr. Nitish Priyadarshi Halogens are present and are volatile trace elements in most geological samples. Among them, iodine has the lowest abundance; less than 0.1 ppm in igneous rocks and less than several ppm in sedimentary rocks. Iodine is least abundant of the halogens and is lithophile element. It is typically a dispersed element and is never concentrated enough in rocks or sediments to form independent minerals. The content of iodine is higher in air masses of marine origin than in those over the continents (Rankama and Sahama, 1950). The content of iodine seems to have some relationship to the salinity of the sea water as it is found to increase to the rise in salinity. Iodine is carried away from the atmosphere partly by rainwater and partly by direct adsorption into the soil and into plants. High solubility of iodine makes it enriched in soil and its highest c...

It is now a globally emerging discipline. by Dr. Nitish Priyadarshi Humans live in lands. Most of them live in intimate contact with the immediate geological environment, obtaining their food and water directly from it. The unique geochemistry of these tropical environments have a marked influence on their health, giving rise to diseases that affect millions of people. The origin of these diseases is geologic as exemplified by dental and skeletal fluorosis, iodine deficiency disorders, trace element imbalances to name a few. Medical Geology is an emerging scientific discipline that examines the impacts that geologic materials and processes have on human and ecosystem health. Medical Geology: · Identifies and characterizes natural and anthropogenic sources of harmful materials in the environment. · Predicts the movement and alteration of chemical, infectious, and other disease-causing agents over time and space. · Provides an understanding of how people are exp...