Johannes Walther
Johannes Walther (July 20, 1860 – May 4, 1937) was a German geologist who discovered important principles of stratigraphy, including Walther's Law.
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Johannes Walther (July 20, 1860 – May 4, 1937) was a German geologist who discovered important principles of stratigraphy, including Walther's Law.
Provided by Wikipedia