The Cause Of The Triassic Jurassic Extinction Is High Levels Of Toxic Compounds Released From Volcanic Activity

“A minority disputes this theory, arguing that other events-such as volcanic eruptions, sea-level changes or a series of impacts-were to blame for the spectacular loss of species that occurred at the transition between the Cretaceous and Tertiary periods…”

Was it the confluence of events outlined in this review (including the prevailing global climate, volcanism), or are some of these factors secondary? For example, we have little idea of the mass of methane hydrates in the Late Permian ocean floor. These and many other questions will need to be addressed before we fully resolve the cause of the end-Permian mass extinction. However, there is a growing realisation that flood basalt volcanism has the potential to be the primary trigger for mass extinctions, rather than meteorite impacts or other external

who theorize that volcanic eruptions could have been the cause for the extinction of dinosaurs

this mass extinction is what brought us the jurassic period, and from the Jurassic period, or the

The Cretaceous mass extinction is the most well-known case of meteorite impact on the earth, but it certainly is not the only one. It is merely the most well-known. Due to the impact, debris entered earth's atmosphere and caused the plant life of the time to die off due to the lack of sunlight to survive. This made food much more scarce for the species that were dominant at the time. The competition was simply too much for them, and as the plant life died out, so did the herbivores and then the carnivores died out as well. Not only the land was impacted, however, the sea life was affected heavily by this impact as well. The lack of sunlight caused the oceans to become colder, causing the habitats of many marine animals to be drastically altered

The end-Triassic or Triassic-Jurassic extinction event occurred around 200 million years ago is and thought by numerous have helped dinosaurs to be the dominant species on earth for 135 million years. It additionally finished life for generally 50% of all species that were available around then. Until this event, mammal like animals known as therapsids were much more than the ancestors of the dinosaurs, known as archosaurs. The dinosaurs survived better compared to the early proto-vertebrates, and this extinction event may have altogether tipped it to support them clarifies #########. Of the Big Five, the Triassic-Jurassic extinction event has the least number of current researches. Its cause stays under debate,

Millions of years ago, a catastrophe occurred on our planet and a wide range of animals and plants suddenly died out, from tiny marine organisms to large dinosaurs. With that, scientists estimated that the majority of all species of plants and animals that ever lived are now extinct. The Cretaceous extinction occurred around 65 million years ago. Many species vanished in that extinction. Yet, the fossil evidence of its occurrence is rich. Therefore, scientists have narrowed down several of the most likely causes of the mass extinction, such as volcano eruptions, asteroid collisions, and sea level falls. With that, there are several other known events, including, global warming, global cooling, methane eruptions and anoxic events when the earth's

The Cretaceous mass extinction had two theories on how and why it happened through the impact hypothesis. The first one was suggested that an asteroid collided with Earth 65 million years ago. Luis Alvarez and his son, Walter Alvarez found “high levels of the rare metal iridium” in the layers of the Earth during the periods of the Cretaceous and Tertiary located in Italy. Their proof is that it was the cause of extinction by an asteroid the size of 10 kilometers. The second impact hypothesis was from a crater that was found buried off the coast of Yucatan, Mexico. Due to the material that was thrown from the crater into the air, plant life could not receive sunlight to survive. The same goes for animals as the atmosphere was filled with dangerous

"By The end of the Mesozoic Era one massive extinction occurred known as The Cretaceous Mass Extinction.This Extinction was assumed to have been caused as result of two mechanism recognized as the impact and the flood volcanism hypothesis".

Mass extinction of the Dinosaurs the most dramatic extinction in the history of the Earth. ( national geographic, 2015 ) The dinosaur extinction could have been sudden or gradual depending on the cause. Scientists have thoroughly researched and finally found two major options, the asteroid impact theory and the volcanic theory, that have many similar qualities, but on the other hand are very different. These two theories could have possibly caused the extinction many years ago.

The Late Devonian mass extinction is one the ‘Big Five’ mass extinction in history of earth which occurred 374.5Ma ago. This extinction event saw at least 70% of species perished; where main victim of this extinction event were the major reef builders, stromotopoids, rugose and tabulate corals (McGHee 2012). Causes of this mass extinction event during the late Devonian gathered a wide variety of debate throughout the years whereby researchers researched substantial theories supported by evidences. The few

We know that there is evidence that dinosaurs once roamed the earth. The only thing dinosaurs left behind is their bones that has helped us learn more about them like what they might have looked like, what they ate, and where they lived but the biggest mystery that still has not been explained is, what exactly caused this mass extinction of dinosaurs to be wiped off the face of the earth?Dinosaurs lived for 165 millions years until 66 million years ago when they went extinct. In this mass extinction 70 percent of species including dinosaurs, plants, and ocean animals were hit the hardest and caused them to die. In the ocean organisms like foraminifera that are single celled protists with shells, echinodermata marine invertebrate known as starfish

There have been many theories to explain the dinosaur extinction. However, Walter Alvarez and colleagues had discovered the evidence for dinosaur extinction. They found the rocks laid down precisely at the K-T boundary contain extraordinary amounts of the metal iridium. And those materials of the rocks would not normally found on Earth’s surface. Then, they discovered those rocks were asteroids. Scientist discovered the K-T impact crater was deeply buried under in Yucatan peninsula of Mexico. The crater was 150-kilometer-wide. Scientists calculated that it likely caused by an object about 6 miles (10 km) across, would have released as much energy as 100 trillion tons of TNT. (Choi & Contributor, 2016) Moreover, scientists have concluded that

Dinosaur extinction: An analysis of events and theories that possibly led to the dinosaurs' demise.

These techniques led to the discovery of the boundary between the two eras. A single thin layer of clay found within predominantly limestone rocks established this. By comparing the marine life found in, above, and below the clay, the marine life, like the dinosaurs, had been terribly affected by the extinction event. The percentage of life in the upper layers was dramatically lower than that in the lower. This was far more compelling than what was suggested by dinosaur’s fossils.