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  2. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    Setonite, also called African bloodstone, is composed of red jasper, grey chalcedony, and pyrite. Dragon's Blood, sometimes called Australian bloodstone, is composed of red jasper and green epidote. The name heliotrope derives from ancient beliefs about the manner in which the mineral reflects light.

  3. Prehistoric rock engravings of the Fontainebleau Forest

    en.wikipedia.org/wiki/Prehistoric_rock...

    The prehistoric rock engravings of the Fontainebleau Forest are an abundant collection of rock art discovered among the sandstone boulders of the Fontainebleau Forest. Several thousand petroglyphs have been discovered in the forest, with earliest dating to the Paleolithic (very few examples), roughly 2000 to the early Mesolithic and almost 300 ...

  4. Petrified wood - Wikipedia

    en.wikipedia.org/wiki/Petrified_wood

    Petrified wood has also been discovered in Dholavira in Kutch, Gujarat, dating back to 187–176 million years. [24] Japan – there is a fossilized forest preserved at Sendai City Tomizawa Site Museum; Indonesia – petrified wood covers several areas in Banten and also in some part of Mount Halimun Salak National Park.

  5. Arizona is full of fossils. Here's where to look for ancient ...

    www.aol.com/arizona-full-fossils-heres-where...

    Jasper Forest: This is a 2.5-mile round-trip hike where you will see substantial petrified logs and rock formations. Both hikes are off the beaten path and visitors should consult the maps at ...

  6. Why Petrified Forest National Park deserves to be a ... - AOL

    www.aol.com/news/why-petrified-forest-national...

    “You have a huge range in the colors of the petrified wood, the textures that you get, and even the way it looks at the surface – whether it's sparkly and like individual crystals that you can ...

  7. Chalcedony - Wikipedia

    en.wikipedia.org/wiki/Chalcedony

    Heliotrope, or bloodstone Heliotrope is a green variety of chalcedony, containing red inclusions of iron oxide that resemble drops of blood , giving heliotrope its alternative name of bloodstone. In a similar variety known as plasma, the spots are yellow instead.

  8. Petrifaction - Wikipedia

    en.wikipedia.org/wiki/Petrifaction

    Tree remains that have undergone petrifaction, as seen in Petrified Forest National Park. In geology, petrifaction or petrification (from Ancient Greek πέτρα (pétra) 'rock, stone') is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.

  9. List of U.S. state fossils - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._state_fossils

    State fossils are distinct from other state emblems like state dinosaurs, state stones, state minerals, state gemstones or state rocks and a state may designate one, a few, or all of those. For example, in Arizona, the state stone is turquoise and the state dinosaur is Sonorasaurus thompsoni yet the state fossil is petrified wood.

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