The Clarkia fossil beds (also known locally as the Fossil Bowl) is a Miocene

Miocene

The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...

 lagerstätte

Lagerstätte

A Lagerstätte is a sedimentary deposit that exhibits extraordinary fossil richness or completeness.Palaeontologists distinguish two kinds....

 located near Clarkia

Clarkia, Idaho

Clarkia is a small unincorporated town in the southwestern corner of Shoshone County, Idaho United States. It is surrounded by publicly and privately managed forest lands of Douglas-fir, Ponderosa Pine, and Western Larch. Located just to the east of State Highway 3, the town is in the drainage...

, Idaho

Idaho

Idaho is a state in the Rocky Mountain area of the United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state....

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The fossil beds were laid down in a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 roughly 15 million years ago, when a drainage basin was dammed by the flood basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

s of the Columbia River Plateau

Columbia River Plateau

The Columbia Plateau is a geologic and geographic region that lies across parts of the U.S. states of Washington, Oregon, and Idaho. It is a wide flood basalt plateau between the Cascade Range and the Rocky Mountains, cut through by the Columbia River...

. Narrow and deep, the lake's cold, anoxic water and rapid sedimentation created perfect fossil conditions. Furthermore, the basin itself has remained tectonically stable, with little deformation since then. The fossils indicate that the region's climate was much warmer and wetter than today's, and similar to that of southern Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

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Though a number of animal species have been found, the site is best known for its fossil leaves. Their preservation is exquisite; fresh leaves are not only unfossilized, but sometimes retain their fall colors before rapidly oxidizing in air. Indeed, scientists have managed to isolate small amounts of DNA

DNA

Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms . The DNA segments that carry this genetic information are called genes, but other DNA sequences have structural purposes, or are involved in...

 from certain specimens. The good condition of the fossils has prompted them to be used as evidence by young Earth creationists

Young Earth creationism

Young Earth creationism is the religious belief that Heavens, Earth, and all life on Earth were created by direct acts of the Abrahamic God during a relatively short period, sometime between 5,700 and 10,000 years ago...

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