How did it form? How does it affect tectonics on the western coast of the US? Cascade Range > Geology: https://en.wikipedia.org/wiki/Cascade_Range#Geology htt

How did it form? How does it affect tectonics on the western coast of the US? Cascade Range > Geology: https://en.wikipedia.org/wiki/Cascade_Range#Geology https://en.wikipedia.org/wiki/Cascade_Range#Geology https://www.sci.news/othersciences/geophysics/hikurangi-water-reservoir-12323.html https://www.sci.news/othersciences/geophysics/hikurangi-wate... : > Revealed by 3D seismic imaging, the newly-discovered [Hikirangi] water reservoir lies 3.2 km (2 miles) under the ocean floor off the coast of New Zealand, where it may be dampening a major earthquake fault that faces the country’s North Island. The fault is known for producing slow-motion earthquakes, called slow slip events. These can release pent-up tectonic pressure harmlessly over days and weeks The "Slow earthquake" wikipedia article mentions the northern Cascades as a research area of interest: https://en.wikipedia.org/wiki/Slow_earthquake https://en.wikipedia.org/wiki/Slow_earthquake They say water has a fingerprint; a hydrochemical and/or a geochemical footprint? Is the water in the reservoir subducted from the surface or is it oozing out of the Earth? "Dehydration melting at the top of the lower mantle" (2014) https://www.science.org/doi/abs/10.1126/science.1253358 https://www.science.org/doi/abs/10.1126/science.1253358 : > Summary: [...] Schmandt et al. combined seismological observations beneath North America with geodynamical modeling and high-pressure and -temperature melting experiments. They conclude that the mantle transition zone — 410 to 660 km below Earth's surface — acts as a large reservoir of water.