INDIAN GEOGRAPHY

Detailed explanation-1: -The presence of iron usually results in red, orange-red, and brown color of rocks. The rock-forming environment also influences the rock color: Rocks deposited in deep water, such as in the ocean or deep lakes, are less oxidized, and these rocks tend to be black or gray.

Detailed explanation-2: -Why are some rocks reddish in color? The rust-colored grains within rock likely contain minerals made up of iron and oxygen, called iron oxides. One example of an iron oxide is hematite (Fe2O3), which is abundant in Earth’s crust.

Detailed explanation-3: -Iron–rich rocks in thin section Hematite will be a more reddish-yellow color. Pyrite is seen as opaque, a yellow-gold color, and metallic. Chamosite is an olive-green color in thin section that readily oxidizes to limonite.

Detailed explanation-4: -Here are some rules of thumb about red minerals: 99 times out of 100, a deep red, transparent mineral is a garnet, and 99 times out of 100, a red or orange sedimentary rock owes its color to microscopic grains of the iron oxide minerals hematite and goethite.

Detailed explanation-5: -Iron ore, or iron ores, are types of rock and minerals from which we can extract metallic iron. These rocks and minerals vary in color, ranging from rusty red, deep purple, a striking yellow, and dark grey.