![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...](thumbs/P1060226.webp)
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…
![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...](thumbs/P1060234.webp)
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...](thumbs/P1060237.webp)
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…
![P1060240 Fossilized logs. The wood was actually driftwood. During flooding and high precipitation events, tree roots were dislodged from banks upstream the rivers; trees...](thumbs/P1060240.webp)
Fossilized logs. The wood was actually driftwood. During flooding and high precipitation events, tree roots were dislodged from banks upstream the rivers;…
![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...](thumbs/P1060243.webp)
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…
![P1060241 If the petrification process continued, the remaining organic material degraded and was replaced by more silica crystals. Eventually, this results in the...](thumbs/P1060241.webp)
If the petrification process continued, the remaining organic material degraded and was replaced by more silica crystals. Eventually, this results in the…
![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...](thumbs/P1060247.webp)
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…
![27 Polished petrified wood: 400kg, 10 hours cutting time (a comparable granite piece would have taken 2.5 hours to cut).](thumbs/27.webp)
Polished petrified wood: 400kg, 10 hours cutting time (a comparable granite piece would have taken 2.5 hours to cut).