STANDING TALL: PLAINS INDIANS ENJOYED HEIGHT, HEALTH ADVANTAGE. COLUMBUS, Ohio - Equestrian Indian tribes on the American Plains in the late 1800s were the tallest people in the world, suggesting that they were surprisingly well-nourished given disease and their lifestyle, a new study found.
Limestone often contains variable amounts of silica in the form of chert (chalcedony, flint, jasper, etc.) or siliceous skeletal fragment (sponge spicules, diatoms, radiolarians), and varying amounts of clay, silt and sand (terrestrial detritus) carried in by rivers.
Marble fizzes with acid because it is composed of the mineral calcite (calcium carbonate-CaCO3) which reacts with acids to form the gas carbon dioxide and it is the release â¦ of the carbon dioxide gas (CO2) that causes the fizzing that is observed during the reaction.arble fizzes with acid because it is composed of the mineral calcite (calcium carbonate-CaCO3) which reacts with acids to form the gas carbon dioxide and it is the release â¦ of the carbon dioxide gas (CO2) that causes the fizzing that is observed during the reaction.