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20 relations: Archaeopteris, Arenite, Asterolepis (fish), Bothriolepis, Cryptospore, Devonian, Estonia, Gauja, Gauja National Park, Gauja Valley, Geological formation, Hostinella, Laccognathus panderi, Latvia, List of fossil sites, Palynology, Quartz, Sandstone, Silicon dioxide, Siltstone.
Archaeopteris
Archaeopteris is an extinct genus of tree-like plants with fern-like leaves.
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Arenite
Arenite (Latin Arena, sand) is a sedimentary clastic rock with sand grain size between 0.0625 mm (0.00246 in) and 2 mm (0.08 in) and contain less than 15% matrix.
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Asterolepis (fish)
Asterolepis is an extinct genus of antiarch placoderms from the Devonian of North and South America and Europe.
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Bothriolepis
Bothriolepis ("pitted scale" or "trench scale") is a widespread, abundant and diverse genus of antiarch placoderms that lived during the Middle to Late Devonian period of the Paleozoic Era.
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Cryptospore
Cryptospores are fossilised primitive plant spores that first appear in the fossil record during the middle of the Ordovician period.
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Devonian
The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya.
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Estonia
Estonia (Eesti), officially the Republic of Estonia (Eesti Vabariik), is a sovereign state in Northern Europe.
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Gauja
The Gauja River (Koiva jõgi, Livländische Aa) is a river in Vidzeme, Latvia.
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Gauja National Park
The Gauja National Park (Gaujas nacionālais parks) in Vidzeme is the largest national park in Latvia, with an area of 917.45 km² running from north-east of Sigulda to south-west of Cēsis along the valley of the Gauja River, from which the park takes its name.
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Gauja Valley
The Gauja Valley (Gaujas senleja) is a valley of the Gauja river in Latvia, which is 1 to 2.5 km wide, and the maximum depth near Sigulda is 85 m. The valley is the main constituent of the Gauja National Park founded in 1973.
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Geological formation
A formation or geological formation is the fundamental unit of lithostratigraphy.
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Hostinella
Hostinella is a form genus, used for bare dichotomously branching stems (axes) which have not been found in association with spore-forming organs or sporangia and so cannot be assigned to a more precise genus or species.
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Laccognathus panderi
Laccognathus panderi is an extinct lobe-finned fish from northern Europe.
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Latvia
Latvia (or; Latvija), officially the Republic of Latvia (Latvijas Republika), is a sovereign state in the Baltic region of Northern Europe.
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List of fossil sites
This list of fossil sites is a worldwide list of localities known well for the presence of fossils.
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Palynology
Palynology is the "study of dust" (from palunō, "strew, sprinkle" and -logy) or "particles that are strewn".
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Quartz
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
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Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments.
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Silicon dioxide
Silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
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Siltstone
Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones.
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Gauja Beds, Gauja Stage, Lode Formation, Lode Member, Sietin Formation, Sietin Member.
