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prehistoric under water life form
Fossils of marine life.Ammonite fossils
Microscopic photo of a thin section of calcareous tufa of Holocene age.
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
An eroding rock with fossil inclusions surrounded by beach rock swash deposits.  These types of rocks are fairly common to find on NW USA beaches for those with a keen eye.
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Explore fossil limestone slabs from Ruegen featuring petrified brachiopods, providing insights into ancient marine environments.
Fossilized fish
Epidermis. Electron microscope micrograph showing a keratinocyte of spinous layer. The epithelial cell has a polygonal shape, central nucleus with nucleolus, cytoplasm full of keratin filament bundles, and numerous dark desmosomes crossing the intercellular spaces.
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.
Stones the structure of the nature background, gray texture. Iron mine, natural texture of volcanic stone
Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Leiden leaf c.s. under microscope
Salt formations on the stones of Garmasr salt cave in Iran
Fossil Oyster
Ammonite Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
four Fossils Specimens  : Practical Specimens for Study of Earth Science / Isolated white
plant Flower bud of Lilium brownii var.viridulum T.S.\nunder light mircoscope with white background
The stalactites are in wooden trays in an exhibition hall
Photomicrograph of flatworm,
Solnhofen Limestone with Subplanites sp. Ammonite fossil
Archaeopteryx marble imprint, fossilized imprint, imprint transitional form (mosaic form), of a theropod dinosaur. Replica of a lime-impression (limestone slab) from the Jurassic about 150 million years old.
close up on Trilobite fossil isolated on white background
Ammomite (Ammomoideae) fossil imprint on a limestone. The image was captured in the canton of schaffhausen during springtime.
trilobite fossil texture as very nice natural background
Twisted rock strata
isolated on black.
blue mold close up background, macro photography
trilobite fossil
Strunjan cliff: .An 80 meters high cliff along 200 meters of the coast, a natural reserve and is the highest flysch cliff in the east part of the Adriatic.
Free Images: "bestof:Walcott Cambrian Geology and Paleontology II plate 13.jpg Plate 13 Middle Cambrian Holothurians Laggania Mackenzia and Louisella 1 Laggania cambria"
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