Portal:Earth sciences/DYK/10

... that volcanic fumaroles deposit more than 240 distinct, rare fumarole minerals (examples pictured)?
... that the permeability of rocks affected by faults can increase or decrease as a result of seismic activity?
... that fossils of the cypress Taxodium dubium have been found as far north as Spitsbergen and Denali?
... that the 1888 eruption of Ritter Island reduced the 780-metre tall (2,560 ft) volcano to a height of just 140 metres (460 ft)?
... that fossil echinoids (example pictured) can be used to date the various chalk strata of the White Cliffs of Dover?
... that during the 2020 Zagreb flash flood, residents broke into a dam control building to drain floodwaters from the city?