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prehistoric under water life form

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.

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.

close up on Trilobite fossil isolated on white background

Fossilized fish

centropyxis aculeata (amoeboid organism) under the microscope - optical microscope x400 magnification

Salt formations on the stones of Garmasr salt cave in Iran

A steel engraving by Johann Georg Heck depicting Henry De la Beche’s Duria Antiquior, a more ancient Dorset. Printed in New York in 1844.

Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).

Trilobite fossil on stone, prehistoric extinct animal lived in Cambrian and Silurian seas. Big trilobite fossil of prehistoric era and rock. Concept of paleontology, evolution and Paleozoic fossil.

Ammonite Fossil preserved in the rocks mined from the reserve found in the Middle Atlas Mountains of Morocco

Isolated on white.

$plant Flower bud of Lilium brownii var.viridulum T.S.\nunder light mircoscope with white background$

Leiden leaf c.s. under microscope

blue mold close up background, macro photography

Explore fossil limestone slabs from Ruegen featuring petrified brachiopods, providing insights into ancient marine environments.

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.

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.

Diplomystus fish fossil from Green River Formation, USA

Bivalvia Fossils inside a large Ammonit. Gastropods from the jurassic period.

The stalactites are in wooden trays in an exhibition hall

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.

Trilobite Paradoxides spiulosus

Fossilized ammonite in limestone on a sidewalk, weathered by time.

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