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prehistoric under water life form
Salt formations on the stones of Garmasr salt cave in Iran
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
Fossil scallop shells from rocks on Gozo island, Malta
Geirangerfjord near Hellesylt in Norway.  This is seaweed in the Fjord.
Stones the structure of the nature background, gray texture. Iron mine, natural texture of volcanic stone
Ammonite Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco
Fossil Oyster
blue mold close up background, macro photography
Leiden leaf c.s. under microscope
Twisted rock strata
isolated on black.
The island of Oahu, in the state of Hawaii, from old camera film in 1987.
The stalactites are in wooden trays in an exhibition hall
Photomicrograph of flatworm,
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.
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Fossil ammonite fossil isolated on white background with clipping path
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).
Solnhofen Limestone with Subplanites sp. Ammonite fossil
elrathia Kingi trilobite fossil in gray shale matrix.
four Fossils Specimens  : Practical Specimens for Study of Earth Science / Isolated white
Marble texture abstract background in natural colors.
Diatoms are photosynthesising algae, they have a siliceous skeleton (frustule) and are found in almost every aquatic environment including fresh and marine waters, soils, in fact almost anywhere moist.
Trace of ammonite fossil on the beach at Lyme Regis, Dorset, uK
Free Images: "bestof:Walcott Cambrian Geology and Paleontology II plate 25.jpg Plate 25 Middle Cambrian Crustaceans Marrella 1 Marrella splendens <small>Walcott</small> 2 Marrella"
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