e/Latah Formation

Information
has gloss	eng: The Latah Formation is a series of late Miocene lacustrine sedimentary deposits which outcrop in eastern Washington and northwestern Idaho. It 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. Whane first described the formation was thought to have predated the deposition of the Columbia Rover basalts, however further investigation showed them to be coeval.
lexicalization	eng: Latah Formation
instance of	c/Geologic formations of the United States