The Virtual Petrified Wood Museum.  Dedicated to the Exhibition and Educational Study of Permineralized Plant Material
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Precambrian
Hadean Eon: 4.5-3.8 Billion Years Ago
Archaean Eon: 3.8-2.5 Billion Years Ago
Proterozoic Eon: 2.5 Billion to 542 Million Years Ago

Minnesota, USA
Stromatolite Minnesoata, USA
Minnesota Introduction
Stromatolite Minnesota, USA
Gallery: Minnesota, USA

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