Disharmonic folds in gneiss. Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.
Layers of the Earth The outside chocolate cookie represents the the crust, the cream represents the squishy mantle, the chocolate syrup represents the liquid iron outer core, and the m represents the solid iron outer core!
Rocks the Charlotte Mason way. CS: Science- Igneous, metamorphic and sedimentary rocks have unique characteristics that can be used for identification and/or classification. AND Igneous, metamorphic and sedimentary rocks form in different ways.
Tiger's eye is a metamorphic rock that is usually a golden-brown to red-brown color, w/ a silky luster. A member of the quartz group, it is a classic example of pseudomorphous replacement by silica of fibrous crocidolite (blue asbestos)
Amphibolite is a non-foliated metamorphic rock that forms through recrystallization under conditions of high viscosity and directed pressure. It is composed primarily of hornblende (amphibole) and plagioclase, usually with very little quartz.