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rough round agate mineral sample with outer shell geode
Rock formations on Oahu coast
...an old Spanish coin, a means of payment from the Iberian Peninsula made of metal
prismatic quartz mineral clusters on rock specimens from the UK
Computer generated 3D illustration with the dinosaur Suchomimus in a landscape
Frozen Puddle in the Meadow, Canada
Other types of mushrooms have pores instead of gills. Like gills, pores produce spores, but they appear as small, sponge-like holes instead of thin blades. The little holes lead to tubes inside the cap. As spores mature, they eventually fall from the tubes out of holes and into their environment.
bunch of natural sponges
Apache tear (obsidian) from the USA
Bivalvia Fossil inside a limestone rock on moss floor. Gastropods from the jurassic period captured during autumn season.
fosilised animal
Concretion formations in a rock in the Grand Staircase-Escalante National Monument in southern Utah during the fall. Concretions are precipitated mineral deposits that form in the spaces of sedimentary rock.
Layers of orange rock exposed in stone pillar
Ammonite in limestone rock (Bavaria, Germany)
scenic coast landscape at Zumaia Flysch trail in the basque country, Spain
Rocks falling looking out from inside the cave. White background to make adding your content easy
Boiling water bubbler Geyser. Active geyser with major eruptions. Yellowstone NP, Wyoming, USA
Calama, Chile
Calcareous slope in Costa Rica
Photomicrograph of freshwater leech. Sucker attached to cover slip at bottom. Live specimen. Wet mount, 2.5X objective, transmitted brightfield illumination. Note - motion blur of live animal, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
The old zinc for the wall is rusty and dirty local steel surfaces isolated on white background with clipping path.
Dried and cracked ground in the desert,Serbia,Nikon D850
internal tissue of a sea creature's shell. pores. macro photo.
Mica, silicate phyllosilicate.
Stones texture nature background photo, High Resolution for 3D.
Cross section of rock  backgrounds
pyrrhotite iron sulfide rare earth mineral
Travels in Italy
Fascinating Istrska Pustinja or desert in istria, gray stones rising from the ground making a desert like appearance in the northern part of istrian peninsula.
Interesting  pattern in hot springs. Looks like a tree to me
Free Images: "bestof:Walcott Cambrian Geology and Paleontology II plate 06.jpg Plate 6 Middle Cambrian Trilobita and Merostomata Neolenus and Sidneyia 1 Neolenus serratus <small>"
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