User:Siim
My name is Siim Sepp. I am a geologist and science writer.
Most of my photos are available on my educational website: Sandatlas.
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Foraminifera
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Sulfur and gypsum from a salt dome cap rock
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Variscite in sandstone
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Skarn composed of calcite, pyroxene, and garnet
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Blue asbestos crocidolite (fibrous riebeckite)
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Collage of sand samples with versatile composition
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Agate breccia
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Calcite
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Conglomerate
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Coral sand
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Folded sedimentary rocks
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Tuff
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Quartz
Maps[edit]
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Names and location of Estonian counties
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Location map of Hiiu maakond
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Location map of Saare maakond
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Location map of Lääne maakond
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Location map of Pärnu maakond
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Location map of Rapla maakond
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Location map of Harju maakond
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Location map of Ida-Viru maakond
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Location map of Lääne-Viru maakond
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Location map of Jõgeva maakond
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Location map of Tartu maakond
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Location map of Viljandi maakond
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Location map of Järva maakond
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Location map of Valga maakond
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Location map of Võru maakond
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Location map of Põlva maakond
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Relief map of Antarctica, based on USGS DEM
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Relief map of Estonia
Rocks[edit]
Igneous rocks[edit]
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Amygdaloidal andesite
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Basalt breccia
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Basalt in albitite
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Diabase
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Diorite
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Ignimbrite
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Kimberlite
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Kimberlite
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Olivine basalt
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Olivine basalt
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Limburgite
Metamorphic rocks[edit]
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Chlorite schist
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Eclogite
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Gneiss
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Phyllite
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Quartzite
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Quartzite
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Migmatite
Sedimentary rocks[edit]
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Banded iron formation
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Dolostone
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Kukersite
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Limestone
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Siltstone
Microphotos of thin sections[edit]
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Andesite (crossed polars)
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Diorite (crossed polars)
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Diorite (plane polarized light)
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Gabbro (crossed polars)
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Granite (crossed polars)
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Graniteporphyry (crossed polars)
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Granodiorite (crossed polars)
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Rhyolite (crossed polars)
Geological structures[edit]
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Glacially abraded rocks in western Norway near Jostedalsbreen glacier
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Gulch in Scotland
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Roadside outcrop of schist in Scotland
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Dike, Island of Mull, Scotland
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Andesite outcrop. Eastern coast of Scotland
Sand[edit]
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Heavy mineral sand composed mainly of garnet crystals from Alaska
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Heavy mineral sand composed mostly of olivine crystals from Hawaii
