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Cauda Galli :: Cauda galli () A plume-shaped fossil, supposed to be a seaweed, characteristic of the lower Devonian rocks; as, the cauda galli grit..

Graptolite :: Graptolite (n.) One of numerous species of slender and delicate fossils, of the genus Graptolites and allied genera, found in the Silurian rocks. They belong to an extinct group (Graptolithina) supposed to be hydroids..

Paleontology :: Paleontology (n.) The science which treats of the ancient life of the earth, or of fossils which are the remains of such life..

Exogyra :: Exogyra (n.) A genus of Cretaceous fossil shells allied to oysters.

Spirillum :: Spirifer (n.) Any one of numerous species of fossil brachipods of the genus Spirifer, or Delthyris, and allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side..

Limuloidea :: Limuloidea (n. pl.) An order of Merostomata, including among living animals the genus Limulus, with various allied fossil genera, mostly of the Carboniferous period. Called also Xiphosura..

Megalosaurus :: Megalosaurus (n.) A gigantic carnivorous dinosaur, whose fossil remains have been found in England and elsewhere..

Asterophyllite :: Asterophyllite (n.) A fossil plant from the coal formations of Europe and America, now regarded as the branchlets and foliage of calamites..

Amber :: Amber (n.) A yellowish translucent resin resembling copal, found as a fossil in alluvial soils, with beds of lignite, or on the seashore in many places. It takes a fine polish, and is used for pipe mouthpieces, beads, etc., and as a basis for a fine varnish. By friction, it becomes strongly electric..

Lapidification :: Lapidification (n.) The act or process of lapidifying; fossilization; petrifaction.

Sigillaria :: Sigillaria (n.) A genus of fossil trees principally found in the coal formation; -- so named from the seallike leaf scars in vertical rows on the surface.

Belemnite :: Belemnite (n.) A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell of a cephalopod related to the sepia, and belonging to an extinct family. The belemnites are found in rocks of the Jurassic and Cretaceous ages..

Fossilized :: Fossilized (imp. & p. p.) of Fossiliz.

Fossilism :: Fossilism (n.) The state of being extremely antiquated in views and opinions.

Scientific :: Scientific (a.) Agreeing with, or depending on, the rules or principles of science; as, a scientific classification; a scientific arrangement of fossils..

Juncite :: Juncite (n.) A fossil rush.

Crinoidea :: Crinoidea (n. pl.) A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula..

Sauroidichnite :: Sauroidichnite (n.) The fossil track of a saurian.

Waldheimia :: Waldheimia (n.) A genus of brachiopods of which many species are found in the fossil state. A few still exist in the deep sea.

Neuropteris :: Neuropteris (n.) An extensive genus of fossil ferns, of which species have been found from the Devonian to the Triassic formation..

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