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Migmatites often appear as tightly, incoherently folded veins (ptygmatic folds). [3] These form segregations of leucosome, light-colored granitic components exsolved within melanosome, a dark colored amphibole- and biotite-rich setting. If present, a mesosome, intermediate in color between a leucosome and melanosome, forms a more or less ...
Iron formations can be divided into subdivisions known as: banded iron formations (BIFs) and granular iron formations (GIFs). [ 3 ] The above classification scheme is the most commonly used and accepted, though sometimes an older system is used which divides iron-rich sedimentary rocks into three categories: bog iron deposits , ironstones , and ...
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Legumes are rich in protein, fiber, B-vitamins, iron, folate, calcium, potassium, phosphorus, and zinc, according to the U.S. National Library of Medicine. Eating legumes may also help to lower ...
(Note though that the iron atoms in the faces are not equivalent by translation alone to the iron atoms at the corners.) The pyrite structure is also seen in other MX 2 compounds of transition metals M and chalcogens X = O, S, Se and Te. Certain dipnictides with X standing for P, As and Sb etc. are also known to adopt the pyrite structure. [37]
[55] [63] Iron can be found in three forms in the brain – magnetite, hemoglobin (blood) and ferritin (protein), and areas of the brain related to motor function generally contain more iron. [63] [64] Magnetite can be found in the hippocampus. The hippocampus is associated with information processing, specifically learning and memory. [63]
The five living U.S. presidents — Joe Biden, Donald Trump, Barack Obama, George W. Bush and Bill Clinton — reunited to honor the life and legacy of Jimmy Carter. On Thursday, Jan. 9, a date ...