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Examples
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The lowest of these is called the Altyn limestone.
The Book of the National Parks Robert Sterling Yard 1903
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White, B., 1970, Algal stromatolites, depositional environments and age of the Altyn Formation of Montana: Geological Society of America, Abstracts with Programs, v. 2, p.
Glacier National Park Geology & Paleontology: Part 2 - Prichard and Altyn ReBecca Foster 2008
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White (1974a,b, 1979) also reports on an assemblage of microfossils that are comparable to modern blue-green algae and unicellular green algae from black chert found within the Altyn Formation (Horodyski, 1993b).
Glacier National Park Geology & Paleontology: Part 2 - Prichard and Altyn ReBecca Foster 2008
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The Altyn Formation, found in the eastern portion of Glacier National Park, is composed predominantly of 1.350 to 1.450 Ga limestones and dolomite.
Archive 2008-08-01 ReBecca Foster 2008
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White published six reports White, 1970, 1974a,b, 1979, 1984; White and Pedone, 1975 about these stromatolites, along with reports of microfossils from the Altyn Formation.
Archive 2008-08-01 ReBecca Foster 2008
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The Fentons noted a stratigraphic error made by Walcott in assigning Weedia tuberose to the Altyn Formation.
Archive 2008-08-01 ReBecca Foster 2008
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A positive example of ecosystem conservation can be found in Altyn-Emel national park (459,627 ha).
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White (1974a,b, 1979) also reports on an assemblage of microfossils that are comparable to modern blue-green algae and unicellular green algae from black chert found within the Altyn Formation (Horodyski, 1993b).
Archive 2008-08-01 ReBecca Foster 2008
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Circular "trace fossils" found in the 1960s from the Altyn Formation have since been found to be pseudofossils that were made by modern bees right; Sando, 1972.
Archive 2008-08-01 ReBecca Foster 2008
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The Prichard Formation, 1.375 to 1.4 Ga sandstone and siltstones, is only found on the western side of the park and is believed to be the age equivalent of the Altyn Formation, found in the eastern portion of Glacier National Park.
Glacier National Park Geology & Paleontology: Part 2 - Prichard and Altyn ReBecca Foster 2008
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