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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.

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

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.

The stalactites are in wooden trays in an exhibition hall

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.

Salt formations on the stones of Garmasr salt cave in Iran

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).

four Fossils Specimens : Practical Specimens for Study of Earth Science / Isolated white

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

blue mold close up background, macro photography

Solnhofen Limestone with Subplanites sp. Ammonite fossil

An arid mountain landscape with an abandoned structure

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.

trilobite fossil texture as very nice natural background

A fish fossil, Euripholis Pictet, from the upper cretaceous period.

$Ammonites are extinct marine mollusks. These can be easily seen during hiking in the Parc Naturel des Préalpes d'Azur.\nThe Regional Natural Park of the Préalpes d'Azur is located in the Alpes-Maritimes department, in the Provence-Alpes-Côte d'Azur region. It is located in the Pre-Alps of Grasse, between the valleys of the Siagne, the Loup, the Cagne, the Estéron and the Var.$

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

Folded rock from mining for education. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds and occur singly as isolated folds and in extensive fold trains of different sizes.

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