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ORGANICS. “Nitrogenous compounds are always present in the atmosphere and are carried down in rainwater.” https://lnkd.in/ete8CApd View in LinkedIn

METATHESIS. “When chemical reactions occur between species in an aqueous solution, the reactions are usually double displacement (also called metathesis or double replacement) reactions. In this type of reaction, the cation from one reactant takes the place for the cation in the other reactant, typically forming an ionic bond. Another way to think of it is that the reactant ions "switch partners".” https://lnkd.in/ei8-eG5H View in LinkedIn

SO ENDS this second weekend featuring the transformations of rocks by aqueous geologic processes, making classifying rocks frustrating and not easy. The reason is that they are an almost infinite variety of gradients and types of mixtures, mostly from the effects of large scale aqueous chemistry, and high temperatures and pressures. Add tectonics that thrust Everest from the seabed, and you see how dynamic and transitory the landscape is. View in LinkedIn

EXAMPLES. “On this basis, metamorphic rocks can be categorized as foliated or non-foliated. For example, slate is a foliated metamorphic rock, originating from shale. Slate is very fine-grained, phyllite is coarse, schist is coarser, and gneiss is very coarse-grained. Marble is generally not foliated, allowing it to be used for sculpture and architecture.” https://lnkd.in/eSpeQsqS View in LinkedIn

NON-BANDED ROCKS. “By contrast, rocks that were subjected to uniform pressure from all sides, or those that lack minerals with distinctive growth habits, will not be foliated. Non-foliated rocks do not have planar patterns of stress.” 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

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

IMPACT. “Research on the photoelectric effect resulted in important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave–particle duality.” https://lnkd.in/eDZvjevE View in LinkedIn

PHOTOELECTRIC EFFECT. “Emission of conduction electrons from typical metals usually needs a few electron-volts, equivalent to short-wavelength visible or ultraviolet light.” https://lnkd.in/eDZvjevE View in LinkedIn

Palamos shrimp are highly prized in Catalonia and owe their color and taste to a very deep finger of the Mediterranean that upwells nutrients near this fishing town. View in LinkedIn