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Petrified tree trunk outside of the Smithsonian Natural History Museum in Washington, D.C. Two hundred and seven million year old conifer (Araucarioxylon arizonicum) from the Triassic period found in today's Petrified Forest National Park in Arizona. Approximately two feet in diameter.
The Algar do Carvão (“Charcoal Pit”) is located in the central part of Terceira Island and, reclassified in 2004, is part of the Azores Regional Network of Protected Areas. The vent of the volcanic pit has 17 by 27 m size and is connected to a peculiar conduit, that ends in a lake of crystal clear water, around 80...