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Black coal stones set on white background isolated close up, natural charcoal pieces collection, anthracite rock texture, raw coal mine nuggets, group of embers, graphite samples, mineral fossil fuel
Gold is distributed around the round quartz mineral as a very fine grain. Gold mining is a very important industrial branch in South Africa. The working conditions are hard and difficult. The main work is done by black people. The ore is brought by a small railway  to the main shaft.
Piece of coal on white background.
Fossil Fern inside a peace of slate. The fossil is more than 100 mio Years old.
trilobite stone fossil sample with ridges and detail
Black Coal Rock on white background.
nothosaurus  fossil on white, isolated
Coal on granite background. Found in an abandoned rail bed in Connecticut.
complete pyritised Leonaspis (Kettneraspis) sp. trilobite from Morocco
Natural wood charcoal isolated on white background.
piece of coal isolated on white
Detail os the fossil of a prehistoric frog
Pieces of broken black coal isolated on white background
Sea Urchin spine fossil.  The close-up image shows a  sea urchin fossil from the jurassic period inside a limestone.
Fossil Fern / Odontopteris sp.350 million years ago
Magnified close up of shale with multiple trilobite fossils.
Fossilized fern and other plants. The most ancient gray stone with prints of plants
Style life of a geological find of a petrified fossil on a white background
lignite (brown coal) from Bergheim, Germany isolated on white background
Fossilized fish
Fossilized fish in a shale rock
Set of natural wood charcoal pieces isolated on a white background
Fossil Fern inside carbon rocks. The image was captured in the Swiss Alps.
Black coal collection isolated on white background. Top view, flat lay
Coal and ash, full frame background
set of various fossilised stones cutout on white background
Knightia alta is an extinct genus of fish well-known from abundant fossils found in the Green River Formation of Wyoming, United States. They rarely exceeded 10 cm in length and are found throughout the formation. Knightia alta, Eocene Epoch, Green River Shale. Fossil.
Micrograph of ancient paleozoic Rugosa coral, also known as horn coral, fossils from the Pennsylvanian period. Viewed in a rock matrix as a thin section. Cross sections of individual corals are about 1 cm in diameter. Collected near Blue Mountain in the Peloncillo Mountian Range, New Mexico, USA.
Free Images: "bestof:British coal measures BHL21593529.jpg A monograph of the fossil insects of the British coal measures by Herbert Bolton 21593529 70276 27747 Table of Contents"
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