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The Mesozoic Era [3] is the era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Periods.It is characterized by the dominance of gymnosperms such as cycads, ginkgoaceae and araucarian conifers, and of archosaurian reptiles such as the dinosaurs; a hot greenhouse climate; and the tectonic break-up of Pangaea.
Dinosaurs evolved partway through the Triassic period of the Mesozoic era, around 230 Ma (million years ago). At that time, the earth had one supercontinental landmass, called Pangaea, of which Europe was a part. So it remained throughout the Triassic.
This is a partial list of dinosaur finds in the United Kingdom, arranged by genus alphabetically. List of dinosaurs Genus Picture Period Discovery locations and dates Acanthopholis Cretaceous (late) Folkestone, Kent in c. 1865 Gault, Kent in 2000 Altispinax Cretaceous (early) Battle, East Sussex in 1856 Anoplosaurus Cretaceous (early) Cambridgeshire, no later than 1878 Aristosuchus Cretaceous ...
The Triassic is the first and shortest period of the Mesozoic Era and the seventh period of the Phanerozoic Eon. Both the start and end of the period are marked by major extinction events . [ 10 ] The Triassic Period is subdivided into three epochs: Early Triassic , Middle Triassic and Late Triassic .
Mesozoic dinosaurs of South America (5 C, 1 P) 0–9. Triassic dinosaurs (4 C) Jurassic dinosaurs (10 C, 3 P) Cretaceous dinosaurs (11 C, 12 P) B. Mesozoic birds (4 C ...
Dinosaurs were the dominant terrestrial vertebrates of the Mesozoic Era, especially the Jurassic and Cretaceous periods. Other groups of animals were restricted in size and niches; mammals , for example, rarely exceeded the size of a domestic cat and were generally rodent-sized carnivores of small prey. [ 19 ]
The present scientific consensus is that birds are a group of maniraptoran theropod dinosaurs that originated during the Mesozoic era. A close relationship between birds and dinosaurs was first proposed in the nineteenth century after the discovery of the primitive bird Archaeopteryx in Germany.
The Cretaceous (along with the Mesozoic) ended with the Cretaceous–Paleogene extinction event, a large mass extinction in which many groups, including non-avian dinosaurs, pterosaurs, and large marine reptiles, died out, widely thought to have been caused by the impact of a large asteroid that formed the Chicxulub crater in the Gulf of Mexico.