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Devonian fossils in limestone matrix include bryozoa, crinoid, and brachiopod fossils. Largest pieces are about 1/2 inch (10 mm). Fossil and Prairie Park Preserve, Silos and Smokestacks National Heritage Area, Rockford, Iowa, USA.
Plant fossils in the Harz on slate tablets offer insights into historical flora, are significant for research and education, and are subject to legal regulations.
Fossil Fern inside a peace of slate. The fossil is more than 100 mio Years old.
Fossil Fern / Odontopteris sp.350 million years ago
Detail os the fossil of a prehistoric frog
Boundary marker of the Peter Ballantyne Cree Nation reserve in Saskatchewan, Canada. Vintage photograph ca. 1919.
Fossils from the Devonian period are embedded into the limestone at the Falls of the Ohio State Park in Indiana
full frame macro Muschelkalk limestone closeup
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.
Moleskine texture color cover on white background
Fossil Fern inside carbon rocks. The image was captured in the Swiss Alps.
Sea fossils, Arwah Cave, Cherrapunjee, Meghalaya, India.
Magnified close up of shale with multiple trilobite fossils.
Fossil of palm
Rock formation (in black and white) captured in a Norwegian fjord in summer. Shot with a full frame camera with a fast lens at low ISO resulting in a large clean file.
Primitive Living Fossil
Close view of natural weathered stone rock cracked granite in daylight
Ammonite inside a limestone rock. The ammonites where living between 409 and 65 million years ago (Mya). The image was captured in the canton of Aargau (Switzerland).
Old Wall Surface Abstract Textured Background Design
exposed rocks containing mica in an old industrial excavation for the extraction of underground minerals in the Ural Mountains
A close-up showing patterns and lines formed in the structure of a rock. Macro image.
Various types of geological natural phenomena
Surinam, Savanne District, Mauritius: onion-skin weathering, due to drastic changes in surface temperatures - layers of magma in concentric spheres on the outside of a boulder.
four Fossils Specimens : Practical Specimens for Study of Earth Science / Isolated white
An Ammonite inside a limestone on an agricultural field. The ammonites where living between 409 and 65 million years ago (Mya).
full frame background showing lots of trilobite fossils
Dark rough natural granite surface background
Free Images: "bestof:Report of the North Carolina geological survey BHL17554974.jpg s of the fossils of the marl beds By Ebenezer Emmons 17554974 58558 18874 Table of Contents 1858"
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First(-fourth) annual report of the Geological survey of Texas, 1889(-1892) (Page 11) BHL40361537.jpg
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B._Old-style_Log_Washer..jpg
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1866_U.S._Coast_Survey_Map_of_Cape_Lookout,_North_Carolina_-_Geographicus_-_CapeLookout-uscs-1866.jpg
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1853_U.S._Coast_Survey_Map_of_Cape_Fear,_North_Carolina_-_Geographicus_-_CapeFear2-uscs-1853.jpg
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Plate_VI._B,_Wetherhill_magnetic_separator_at_German-American_Monazine_Company's_plant,_Oak_Springs,_N._C..jpg
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B._Bottom_of_90-foot_Pit,_Shuford_Mine,_Catawba_County,_N._C..jpg
Plate_V._View_of_the_Whitney_Company's_mine,_Gold_Hill,_Roway_County,_N._C..jpg
B._Model_of_Square_Set_Timbering,_Showing_Location_of_an_Ore_Chute..jpg
A._Cyanide_Plant,_Mongomery_Mine,_Montgomery_County,_N._C..jpg
A._Head_of_Steep_Incline,_where_Ore_is_Dumped_on_Grizzly,_Shuford_Mine,_Catawba_County,_N._C..jpg
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1852_U.S._Coast_Survey_Map_of_the_North_and_South_Edisto_Rivers,_South_Carolina_(Charleston)_-_Geographicus_-_EdistoRiver-uscs-1852.jpg
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