Latah Formation
The Latah Formation is a series of late Miocene lacustrine sedimentary deposits which outcrop in eastern Washington and northwestern Idaho. The lake beds are interbedded with igneous rock of the Columbia River Basalt Group. The formation was originally named from a site in Spokane, Washington by Dr. Kirk Bryan in 1923. Numerous fossil plants and insects have been recovered from the formation and described. When first described the formation was thought to have predated the deposition of the Columbia River Basalts, however further investigation showed them to be interbedded, being laid down in successive events. Potassium-argon dating of the formation returned an age range of 21.3 to 12.1 million years old, indicating an Early to Middle Miocene age range.
1931 in paleontology1932 in paleontology1987 in paleontology2018 in mammal paleontologyAcer browniAcer chaneyiAcer latahenseAcer whitebirdenseColumbia River Basalt GroupComptonia columbianaList of Acer speciesList of fossiliferous stratigraphic units in IdahoList of fossiliferous stratigraphic units in Washington (state)ParastylotermesPinus latahensisPseudolarix wehriiSassafras hesperiaTaxodium dubiumTessaratomidaeTrochodendron rosayiUlmus okanaganensis
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Latah Formation
The Latah Formation is a series of late Miocene lacustrine sedimentary deposits which outcrop in eastern Washington and northwestern Idaho. The lake beds are interbedded with igneous rock of the Columbia River Basalt Group. The formation was originally named from a site in Spokane, Washington by Dr. Kirk Bryan in 1923. Numerous fossil plants and insects have been recovered from the formation and described. When first described the formation was thought to have predated the deposition of the Columbia River Basalts, however further investigation showed them to be interbedded, being laid down in successive events. Potassium-argon dating of the formation returned an age range of 21.3 to 12.1 million years old, indicating an Early to Middle Miocene age range.
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La formazione Latah (in lingua ...... al Miocene inferiore e medio.
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The Latah Formation is a serie ...... y to Middle Miocene age range.
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United States
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name
Latah Formation
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namedby
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Miocene
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prilithology
Fluvial
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region
Eastern Washington & northwestern Idaho
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La formazione Latah (in lingua ...... , con una larghezza di 121 km.
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The Latah Formation is a serie ...... y to Middle Miocene age range.
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Formazione Latah
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Latah Formation
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