Cretaceous and Tylosaurus

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Difference between Cretaceous and Tylosaurus

Cretaceous vs. Tylosaurus

The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago (mya) to the beginning of the Paleogene Period mya. Tylosaurus (Greek τυλος/tylos "protuberance, knob" + Greek σαυρος/sauros "lizard") was a mosasaur, a large, predatory marine lizard closely related to modern monitor lizards and to snakes.

Campanian

The Campanian is, in the ICS' geologic timescale, the fifth of six ages of the Late Cretaceous epoch (or, in chronostratigraphy: the fifth of six stages in the Upper Cretaceous series).

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Coniacian

The Coniacian is an age or stage in the geologic timescale.

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Continental shelf

The continental shelf is an underwater landmass which extends from a continent, resulting in an area of relatively shallow water known as a shelf sea.

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Hesperornis

Hesperornis (meaning "western bird") is a genus of flightless aquatic birds that spanned the first half of the Campanian age of the Late Cretaceous period (83.5–78 mya).

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Kansas

Kansas is a U.S. state in the Midwestern United States.

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Late Cretaceous

The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale.

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Mosasaur

Mosasaurs (from Latin Mosa meaning the 'Meuse river', and Greek σαύρος sauros meaning 'lizard') are an extinct group of large marine reptiles containing 38 genera in total.

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Mosasaurus

Mosasaurus ("lizard of the Meuse River") is a genus of mosasaurs, extinct carnivorous aquatic lizards.

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Plesiosauria

Plesiosauria (Greek: πλησίος, plesios, meaning "near to" and Sauria) or plesiosaurs are an order or clade of Mesozoic marine reptiles (marine Sauropsida), belonging to the Sauropterygia.

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Santonian

The Santonian is an age in the geologic timescale or a chronostratigraphic stage.

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Shark

Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head.

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Smoky Hill Chalk

The Smoky Hill Chalk Member of the Niobrara Chalk formation is a Cretaceous conservation Lagerstätte, or fossil rich geological formation, known primarily for its exceptionally well-preserved marine reptiles.

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Western Interior Seaway

The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, and the Western Interior Sea) was a large inland sea that existed during the mid- to late Cretaceous period as well as the very early Paleogene, splitting the continent of North America into two landmasses, Laramidia to the west and Appalachia to the east.

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