Emotional and cognitive changes. The emotional and cognitive effects of MS are often its greatest challenges. Last updated: 10th November 2016. Some of the most common but hidden symptoms of MS are the changes people may experience related to cognition and their emotions. These changes can affect the way people feel about themselves and alter their cognitive functions. For many, the emotional and cognitive effects of the disease represent its greatest challenges.
A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that there are reasonable prospects for eventual economic extraction.
Mineral Resources. Minerals are defined as homogenous, naturally occurring, inorganic solids, each having their own characteristic chemical composition and highly ordered atomic structure. It is estimated that there are some 4,000 mineral types.A rock is an aggregate of one or more minerals or a body of undifferentiated mineral matter.stimating Mineral Reserves. In an effort to assess the quantities of mineral resources, the U.S. Geological Survey uses a classification system that evaluates the degree of certainty about the existence and magnitude of supplies and the economic feasibility of recovering them.