Thin section photograph of Karlsbad Pisoid
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Thin section photograph of Karlsbad Pisoid

by Axel Munnecke

Thin section photograph of aragonitic pisoids with fringes of acicular aragonitic cement and large open pores. The rock is called "Karlsbad Sprudelstein"; it precipitated in hot, mineral-rich springs situated along tectonic faults (crossed polars; width of picture is 1.4cm; Karlovy Vary, Czech Republic).

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Bernardo Cesare 6 years ago

WOW!