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VARIABLE SOLUTES. “Rainwater has a complex chemical composition that varies from place to place, as well as from shower to shower and season to season in the same place. Rainwater contains some constituents of local origin, and some that have been transported by winds from elsewhere.” https://lnkd.in/ete8CApd View in LinkedIn

“WEATHERING rocks, and their redistribution by plants and animals. It is probable that the pH of rainwater, as well as the amount of rain and its contained cations and anions, has an important influence on the weathering of minerals and rocks in any locality.” https://lnkd.in/ete8CApd View in LinkedIn

VAST PH RANGES. “The pH of rainwater in any area varies considerably and seems to form a seasonal and regional pattern. The recorded pH values range from 3.0 to 9.8.” https://lnkd.in/ete8CApd View in LinkedIn

IONIC BREW. “The stability of soil clay minerals is influenced by the constant accession of cations from rainwater. Conversely, the clay minerals modify the amounts and kinds of cations that are leached out by drainage waters. The stability of micaceous minerals in soils may be partly due to accessions of K+1 ions from rainwater.” https://lnkd.in/ete8CApd View in LinkedIn

FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on the topic of the constant flux of rocks. Geology is about constant transformations and highly dynamic processes occurring at large time and space scales with an enormous variety of components, resulting in a staggering diversity of rocks. https://lnkd.in/ete8CApd View in LinkedIn

Sardines on a fishing hook, a background by my great photographer. Poor critters are low on the food chain." "" " @marryme.films " "" "#sardines #humor #tin #marine #sealife View in LinkedIn

Backstreet in old town Girona. View in LinkedIn

THE SEED. “In 1887, the German physicist Heinrich Rudolf Hertz (22 February 1857–1 January 1894) (Figure 1) found that electrodes irradiated with ultraviolet light created electric sparks more easily.” https://lnkd.in/eDZvjevE View in LinkedIn

SEASONAL SOLUTIONS. “The mean pH of the entire network shows a distinct annual cycle, the acidity being greatest in winter and the alkalinity greatest in late spring. These facts are of considerable geochemical significance because the pH values characterize the reaction of the water that is leaching rocks and soils in Scandinavia.” https://lnkd.in/ete8CApd View in LinkedIn

A wonderful series of unrealated afterthoughts written in a wall in Girona. View in LinkedIn