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fossil

(Encyclopedia)fossil, remains or imprints of plants or animals preserved from prehistoric times by the operation of natural conditions. Fossils are found in sedimentary rock, asphalt deposits, and coal and sometime...

fossil fuel

(Encyclopedia)fossil fuel: see energy, sources of; fuel. ...

Fossil Butte National Monument

(Encyclopedia)Fossil Butte National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Hagerman Fossil Beds National Monument

(Encyclopedia)Hagerman Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Florissant Fossil Beds National Monument

(Encyclopedia)Florissant Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Agate Fossil Beds National Monument

(Encyclopedia)Agate Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Tule Springs Fossil Beds National Monument

(Encyclopedia)Tule Springs Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

petrifaction

(Encyclopedia)petrifaction: see fossil.

Marsh, Othniel Charles

(Encyclopedia)Marsh, Othniel Charles, 1831–99, American paleontologist, b. Lockport, N.Y., grad. Yale, 1860. He studied abroad, and from 1866 served at Yale as the first professor of paleontology and as curator o...

concretion

(Encyclopedia)concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the pore spaces of the...