Earth Patterns
Bjorn Jamtveit, Physics of Geological Processes, University of Oslo

Interactions between rocks and reactive fluids produce a plethora of patterns, often visible to the naked eye, both at the Earth's surface and at depth. Patterns arise from the coupling between chemical reactions, transport and sometimes, mechanical processes in systems where fluids and solids are at least initially sufficiently far from thermodynamic equilibrium for non-linear processes to operate. Surprisingly often, similar patterns are formed at different scales under very different conditions in systems with different chemical compositions. For example, many of the patterns formed by growth and dissolution processes mediated by reactive fluids at or near the Earth's surface can also be seen in ice. I will focus on patterns generated by precipiation of solids from supersaturated solutions flowing on the Earths surface, in pipelines or channels, and within porous rocks.

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