Year: 2022

CATION EXCHANGES. “The cations of the soluble salts in saline soils occupy the exchange positions of the clay minerals and modify or prevent development of soil profiles, particularly with regard to the movement of clay. Sodium in exchange positions may cause a flocculated, jellylike mass of clay similar to a sodium bentonite when wet.” https://lnkd.in/ete8CApd View in LinkedIn

DYNAMIC SOLUTES. “Calcium and magnesium are the dominant exchangeable cations in most soils with a neutral or alkaline reaction. Rainwater dilutes the soil solution, but at the same time it adds appreciable amounts of cations.” https://lnkd.in/ete8CApd View in LinkedIn

VAST ION EXCHANGES. “Dilution of the soil solution by the addition of water containing much Ca+2 and Mg+2 favors the leaching of NV1 and the retention of the calcium and magnesium in the exchange sites of clay minerals and organic matter in soils.” https://lnkd.in/ete8CApd View in LinkedIn

VIDEO of crystal grain growth. https://lnkd.in/ePfF6xAY View in LinkedIn

METAMORPHIC ROCK. “The process of metamorphism may also involve chemical reactions between minerals, even if they are not in the molten state. In this case, the minerals exchange atoms and new minerals are formed.” https://lnkd.in/eSpeQsqS View in LinkedIn

ADD TEMPERATURE AND PRESSURE. “Many complex reactions may take place, and each resultant mineral assemblage provides us with a clue regarding the temperatures and pressures at the time of metamorphism.” https://lnkd.in/eSpeQsqS View in LinkedIn

ROCKS CONSTANTLY CHANGE. “Metasomatism is the drastic change in the bulk chemical composition of a rock, due to the introduction of chemicals from other surrounding rocks.” https://lnkd.in/eSpeQsqS View in LinkedIn

ROLE OF RAINWATER. “Hot water and other fluids may transport these chemicals rapidly over great distances. Based on the role played by water, metamorphic rocks generally contain many elements that were absent from the original rock, and they lack some that were originally present.” https://lnkd.in/eSpeQsqS View in LinkedIn

FOLIATION. “The layering within metamorphic rocks is called foliation, and the rock is known as foliated or banded rock. The term "foliation" is derived from the Latin word folia, which means "leaves." https://lnkd.in/eSpeQsqS View in LinkedIn

BANDED ROCK. “Foliation occurs when a strong compressive force is applied to a recrystallizing rock from one direction. Consequently, the platy or elongated crystals of some minerals (such as mica or chlorite) grow with their long axes perpendicular to the direction of the force. This process results in foliated rock, in which the bands display the colors of the minerals that formed them.” https://lnkd.in/eSpeQsqS View in LinkedIn