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Petrified wood, 20 million years old wood. Wood turned into stone
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Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Microscopic photo of a thin section of calcareous tufa of Holocene age.
Unique underground geology of  stalactites and stalagmites.
Leiden leaf c.s. under microscope
Mineral Fusinus sp. Pliozän
The Amphitheatre of El Jem, Tunisia
Marine life fossils.
Macro cubical pyrite on white matrix isolated on gray background
Asbestos family mineral band in geological rock sample
layered soil geology cross section underground earth, cutaway earth ground terrain surface
Cliff dwellings near Flagstaff, Arizona.
chrysoprase, closeup of the stone
Tiger’s eye mineral stone sample macro photography
Big natural stone green amber on white background
Fossilised Fish
Close-up of naturally occurring rare crystalline ore
Agate is a microcrystalline variety of quartz, chiefly chalcedony, cryptocrystalline form of silica.  Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks. Most agates occur as nodules in volcanic rocks or ancient lavas where they represent cavities originally produced by the disengagement of volatiles in the molten mass which were then filled, wholly  by siliceous matter deposited in regular layers upon the walls. Cathedral Valley, Capitol Reef National Park, Utah.
abstract form and texture on grunge floor
Close up of a reptile skull partially buried at an excavation site.
The study of plant tissues under the microscope in the laboratory.
rough gemstones on neutral background
quartz geode from Morocco isolated on white background
In southwest Colorado, well-preserved Ancestral Puebloan cliff dwellings.
Old pieces of metal cut with a saw. Small metalwork in a home workshop. Light background.
Natural ecology, stone, rust, texture, background, abstract, plain stone, rock, building material, shape, solid, marble, granite, sea stone, wall, floor, stone wall, color, nature, simplicity
Black tourmaline stone on a background of natural wood American black walnut. Mineral collection stones. Stone is a sherl tourmaline. Black Crystal.
The Odeon - a small roofed theatre constructed by Vedius Antonius and his wife in around 150 A.D. There were 22 stairs in the theater.  The entrances were at both sides of the stage and reached by a few steps. First it was used as a Bouleuterion for the meetings of the Boulea or the Senate. The second fuction was the Odeum as a concert hall for the performances.  Ruins at Ephesus, Turkey,
Free Images: "bestof:TlalocBrazier.JPG Fragments of a brazier depicting Tlaloc from Stage IVB of the Templo Mayor in Mexico City Own 2008-03-23 Thelmadatter Tlaloc Museo del Templo"
Atlante, Chichen Itza, Yucatan, Mexique.jpg
Glyphes calendaires, temple oublié, Palenque, Mexique.jpg
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Enrique Simonet - Flevit super illam 1892.jpg
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