P1060222 To petrified forest.
To petrified forest.
P1060226 Today, petrified forest national park is a semi-arid grassland. Temperatures can range from above 38C to well below freezing. About 25cm of moisture comes...
Today, petrified forest national park is a semi-arid grassland. Temperatures can range from above 38C to well below freezing. About 25cm of moisture comes…
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P1060234 During the late triassic period, rivers then flowing through the park carried much sediment. As the waters subsided after flooding events, silt, mud and sand...
During the late triassic period, rivers then flowing through the park carried much sediment. As the waters subsided after flooding events, silt, mud and sand…
P1060237 The badlands are part of the Chinle formation, which was deposited 200 million years ago, over a 10 million years period, during the late triassic period. The...
The badlands are part of the Chinle formation, which was deposited 200 million years ago, over a 10 million years period, during the late triassic period. The…
P1060239 Dry wash.
Dry wash.
P1060240 Fossilized logs. The wood was actually driftwood. During flooding and high precipitation events, tree roots were dislodged from banks upstream the rivers; trees...
Fossilized logs. The wood was actually driftwood. During flooding and high precipitation events, tree roots were dislodged from banks upstream the rivers; trees…
P1060243 Buried beneath layers of mud, silt, sand and volcanic ash, the logs were protected from decay. Mineral-laden ground water percolating down through the layers of...
Buried beneath layers of mud, silt, sand and volcanic ash, the logs were protected from decay. Mineral-laden ground water percolating down through the layers of…
P1060241 If the petrification process continued, the remaining organic material degraded and was replaced by more silica crystals. Eventually, this results in the...
If the petrification process continued, the remaining organic material degraded and was replaced by more silica crystals. Eventually, this results in the…
P1060242 Petrified wood.
Petrified wood.
P1060247 Placerias hesternus, a reptile with many mammalian features, around 2.5m long, up to 2 tons. A large number of placerias fossils were found in a single quarry...
Placerias hesternus, a reptile with many mammalian features, around 2.5m long, up to 2 tons. A large number of placerias fossils were found in a single quarry…
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27 Polished petrified wood: 400kg, 10 hours cutting time (a comparable granite piece would have taken 2.5 hours to cut).
Polished petrified wood: 400kg, 10 hours cutting time (a comparable granite piece would have taken 2.5 hours to cut).
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P1060281 Since petrified logs are composed of quartz, they are hard and brittle, breaking easly when subjected to stress. The hard logs are surrounded by softer...
Since petrified logs are composed of quartz, they are hard and brittle, breaking easly when subjected to stress. The hard logs are surrounded by softer…
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