Sedimentary ore deposits contain platinum, gold, diamond-containing ores, and also zinc and tin that are found in sedimentary environments. Some metamorphic ores comprise iron oxides, silver, and lead. Ores are also formed due to hydrothermal processes. These include exposure of minerals and rocks...
Metamorphic rocks are one of the three types of rock classifications, the other two being igneous and sedimentary. Rocks are classified by the processes under which they were formed. The differences in formation account for variations in the appearance of the rocks and, with some practice, you ...
Metamorphic rocks tend to be the hardest of the three types of rock, which are igneous, metamorphic, and sedimentary rocks. This is because the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
Tumbled igneous and metamorphic rocks: Some rocks will take a nice polish. Shown here are granite, basalt, gabbro, gneiss, and other types of rock collected from Ohio River sediments and sold as landscape stone. Rocks Basalt (a black, fine-grained igneous rock) Granite (a coarse-grained ...
The "grapes" of these specimens are tiny. They range between about two and eight millimeters across. Although purple is the best color to match the "grape" name, some specimens have grapes that are white, gray, green, or blue.Grape Agate: A tiny cluster of grape agate with superb color...
The lithosphere is made up of Earth's crust and a small portion of the upper mantle. There are 15 major tectonic plates on Earth, some of which have familiar names:View Video Only Save Timeline Video Quiz Course 401K views What is a Transform Boundary? Transform boundaries are created...
Anatase and brookite are found in the igneous environment particularly as products of autogenic alteration during the cooling of plutonic rocks; anatase is also found in placer deposits sourced from primary rutile. The occurrence of large specimen crystals is most common in pegmatites, skarns, and ...
Dr. Ross also blames the radicals for the bad favour the universities are in now, the radicals and other undesirables. As well as the universities being plagued with rowdyism and anarchic behaviour, "Some professors were overtly docttinain in their teaching and sought deliberately to ihdoctrina...
although the colour differs with the existence of impurity. The jade could be light gray to black with iron and other transformation components. The majority of black obsidians are magnetite-nanoinclusions, iron oxide. Very few obsidian specimens are almost colorless. In some rocks, the incorporatio...
However, its constituent countries are not sovereign and therefore cannot be called "sovereign states." London is the capital of both the country of England and the sovereign state of the United Kingdom. Some people use the names "Great Britain" and "United Kingdom" interchangeably, but this ...