How many years ago was Jurassic? How many years is the Jurassic era from now

The Jurassic era dates back more than 200 million years.

The Jurassic is a geological epoch between the Triassic and Cretaceous periods, ranging from 199.6 million BC (600,000 years of error) to 145.5 million years (4 million years of error). The Jurassic is the second epoch of the Mesozoic Era, which began with the Triassic-Jurassic extinction event. Although the rock markings of this period are very clear and clear, the exact time of their beginning and end, like other ancient geological epochs, cannot be determined with great precision.

The name Jurassic originates from the Jura Mountains on the border of Switzerland and France, and is the result of a French paleontologist aPresented by Bronyaar in 1829. Due to the obvious tripartite nature of the European Jurassic lithology, in 1837, Bucher divided the Jurassic in southern Germany into three parts: the lower, the middle and the upper.

In 1843, Quinstede called the lower black marl black Jura, the brown iron-bearing limestone in the middle brown Jurass, and the upper white marl White Jura. The Jurassic is divided into three epochs: early, middle and late.

Jurassic is named by Alexander Blonniar and takes its name from the Jura Mountains on the border of Germany, France and Switzerland, which have many large-scale marine limestone outcrops.

More than 200 million years The Jurassic period is more than 200 million years away from now, alas, I don't know.

The Jurassic period is a geological epoch of reptiles and gymnosperms, about 100 million years ago - 100 million years ago. The strata formed during this period are called Jurassic and belong to the middle Mesozoic era. The Mesozoic Era is one of the three geological epochs of the Phanerozoic, which can be divided into three periods: Triassic, Jurassic and Cretaceous.

Triassic: 100 million to 200 million years ago. Cretaceous:

100 million years ago to 66 million years ago.

The Jurassic is further divided into three epochs: early, middle and late. In the early Jurassic period, because of the mass extinction, all kinds of animals and plants were very rare, but among them, dinosaurs always stood out, waiting for the opportunity to dominate the land. After the mid-to-late Jurassic, dinosaurs became the most prosperous dominant species on Earth, and would rule the Earth for hundreds of millions of years until the Cretaceous-Tertiary extinction event.

The front is Triassic, and the back is Cretaceous.

1. Triassic.

The Triassic (English: Triassic), a geological epoch between 100 million and 200 million BC, is located between the Permian and Jurassic periods, and is the first epoch of the Mesozoic Era. The beginning and end of the Triassic were each marked by an extinction event.

Although the rock markings of this period are very clear and clear, the exact time of their beginning and end, like other ancient geological epochs, cannot be determined with great precision. The error is plus or minus millions of years.

During the Triassic, vertebrates were further developed. Among them, the appearance of alveolar reptiles, and from it developed the earliest dinosaurs, the late Triassic, sauropods and ornithischian have many species, dinosaurs are already a wide variety of groups, occupy an important position in the ecosystem Therefore, the Triassic is also known as "the dawn before the generation of dinosaurs".

At the same time, the first mammals, mammal-like reptiles, evolved from the zoomorphic reptiles, but for more than 100 million years from the Jurassic to the Cretaceous, these untimely mammals lived in the shadow of dinosaur-dominated reptiles until the Cenozoic Era.

2. Cretaceous.

The Cretaceous Period is the last epoch of the Mesozoic Era in geological time, beginning 100 million years ago and ending 66 million years ago, over a period of 79 million years. It is the longest phase of the Phanerozoic.

During this period, the continents were divided by oceans, and the earth became warm and arid. During the period of the largest dinosaurs, many new species of dinosaurs began to appear, dinosaurs still ruled the land, pterosaurs glided through the sky, and huge marine reptiles ruled the shallow seas. The first snakes, moths, and bees, as well as many new small mammals, also appeared.

Angiosperms also appeared during this period.

The Cretaceous is named after the fact that the strata of this age in western Europe were mainly Cretaceous deposits. The Cretaceous is located between the Jurassic and Paleogene periods, from 145 million years ago BC (error value of 4 million years) to 65 million years ago (error value of 300,000 years). The extinction event that occurred at the end of the Cretaceous period was the boundary between the Mesozoic and Cenozoic eras.

The Cretaceous climate was quite warm, and sea levels varied greatly. Dinosaurs lived on land, and marine reptiles, ammonites, and thick-shelled clams lived in the ocean. New mammals, birds, and flowering plants appeared for the first time.

The Cretaceous-Tertiary extinction event was one of the most severe mass extinction events in geological time, with the extinction of most species, including dinosaurs.

The Jurassic period was the heyday of dinosaurs, and dinosaurs that emerged and began to develop during the Triassic period have quickly become the rulers of the earth. All kinds of dinosaurs come together to form a world of dragons in various forms. At that time, in addition to the huge bodies of the Diplodocus, Diplodocus, and Brachiosaurus on land, ichthyosaurs and flying pterosaurs in the water also developed and evolved in large numbers.

Largest carnivorous dinosaur: Spinosaurus, 16 to 19 meters long and weighing tons.

The largest herbivorous dinosaur and the largest dinosaur: the fragile dinosaur, which could reach a length of 58-62 meters and weigh 150-180 tons.

The smallest dinosaur, the small gallop, was only 39 centimeters long and weighed 162 grams.

The smallest herbivorous dinosaurs: Microceratosaurus and Wannansaurus, about 60 cm long.

The earliest dinosaurs: The archaeopteractosaur found in the Valley of the Moon region of Argentina is the oldest dinosaur that lived in the Late Triassic period.

The latest dinosaur to appear: Ceratosaurus dinosaurs were at their most prevalent after 100 million years ago.

Dinosaur with the longest teeth: Tyrannosaurus rex, with teeth over 30 cm.

The earliest dinosaur hall with feathers was found in the thick section of the dinosaur hall: Ornithosaurus, found in the Linglong Pagoda area of Jianchang County, Liaoning Province, about 100 million years ago. It is a new and international breakthrough in the study of the origin of birds.

Dinosaur (animal) encyclopedia.

Summary. Hello dear, the Jurassic is a period of geological time, about 100 million to 100 million years ago, which is the second period of the Mesozoic Era.

Hello dear, the Jurassic is a period of geological time, about 100 million to 100 million years ago, which is the second period of the Mesozoic Era.

During the Jurassic period, dinosaurs and other archaeozoic dendrites flourished on Earth, and new types of terrestrial plants began to appear. The Jurassic period is divided into three stages: early, middle and late, which are the Early Jurassic from 100 million years ago to 100 million years ago, the Middle Jurassic from 100 million years ago to 100 million years ago, and the Late Jurassic from 100 million years ago to 100 million years ago.