Investigaciones

Mesozoic OF THE DINOSAURS
It is divided into three periods: Triassic, Jurassic and Cretaceous.
The flora and fauna of this age are significant differences in the Paleozoic. They develop gymnospermsand angiosperms. Cephalopods, belemnites and armonites are very characteristic, and the bivalves.
Among the echinoderms include sea urchins, micraster.
Fish evolve into the cartilage and bone. Butthe fact that best defines the Secondary era is the adaptation of the reptiles to all life: land, air and marine, and carnivorous feeding regimes and herbivorous species by far, some of great size,dinosaurs.
It leads to fragmentation of Gondwana during the Jurassic, initiating the formation of the South Atlantic and the Indian Ocean, on the continent is a strong North Atlantic marinetransgression, being reduced to a large Western European archipelago in the Upper Jurassic-whose main centers are: the Iberian Meseta, the Massif Central and the Armorican massifs, Rhenish and Bohemian.
Bycontrast, in America, during the Jurassic and Cretaceous orogenic movements occurred important, which is due the peaceful uprising ridges (North America and the Andes).
It is characterized by intensemagmatic activity, which causes the appearance of basic type rocks, as Ophites Triassic and fissure-type basaltic eruptions in the Triassic-Jurassic. Its duration varies from 140 to 170 million years.-Triassic: There are two types of sediments: continental (German industries) and marine (Alpine Trias). The German is composed of sandstones and conglomerates, limestones conchíferas, gypsum and clay.The Alpine consists of limestones and dolomites.
The fauna of ammonites, carafites, branquiódopos, corals, crinoids, ect. Duration: 35 million years.
-Jurassic: In deep geosynclinal of majorvolcanic eruptions occurred. The hot and humid weather, wildlife are very typical ammonites and belemnites. Reptiles adapt to all kinds of life are flying pterosaurs, ichthyosaurs, marine dinosaurs,...