Cretaceous

1. Short summary of the history At 145 ± 4 to 66 million years (Ma) ago, Cretaceous period was the last period of the Mesozoic Era, right after Jurassic period and followed by the Paleogene period of the Cenozoic Era (International Commission Chart, 2014). 'Creta' in Latin means chalk and this is due to the large amount of calcium carbonate deposited by shells of marine animals thus resulting in large quantities of chalk (American Geological Institute, 1972). The shifting of continents as the result of the separation of the world-continent Pangaea continued on in the Cretaceous period that led to evolution of life on land and creation of new coastlines as well as an increase in the floras and faunas with the evolution of forest (Waggoner,…

Over the course of the Earth’s history there have been five Mass Extinctions, a global event where at least 75% of the life on Earth dies. In most of these events the only life form to survive are bacteria, or other small organisms that can hide from the destructive force that wipes out everything else. The Cretaceous-Tertiary (K/T) is the most recent and most famous Mass Extinction, taking place 65 million years ago. The K/T is the event in which the dinosaurs died in. The cause of this event…

another, without the other they could not occur. If the extinction of the dinosaurs was gradually over millions of years “both process probably played a role”(DinoBuzz). Most scientists do agree that an asteroid was a factor, it’s also acknowledged thaDinosaurs roamed the earth for 163 million years.(Dinosaur Worlds). They thrived as one of the most successful groups of animals in the history of life on land(PBS). Then, 66 million years ago, the last group of dinosaurs disappeared forever;…

Gobisaurus was an herbivore dinosaur that came from the ankylosaurid section in the upper Cretaceous part of China. This is a reptile dinosaur that was named “Gobi” after the Gobi Desert, which covers some parts of China. Matthew K. Vickaryous, Anthony P. Russell, Phillip J. Currie, and Xi-Jin Zhao named this dinosaur in 2001. The dinosaur was a medium-sized dinosaur that had four legs and was known for its armored shell with tail spikes that would intimidate other dinosaurs. The genus of…

Hypothesis (VBH) was re-examined after these scientists had the opportunity to review histology data for sauropod cervical ribs, discovering that there were collagen fibers attached in a length-wise fashion. They recognized that these tissues closely resemble the tissue structures found in ossified tendons and this different fiber structure would allow for a sauropod neck to have greater flexibility because the fibrous forces act parallel to the length, not perpendicular to it as the VBH…

youngest, Triassic Period, the Jurassic Period, and the Cretaceous Period.…

everything needs food, but the Giganotosaurus has a diet like no other. According to Joseph Castro, the Giganotosaurus preyed on massive herbivorous sauropods.It is also thought that the Giganotosaurus hunted in packs to take down creatures like the Argentinosaurus,the largest sauropod known(Castro). While these beast would hunt the Argentinosaurus what would be hunting them, nothing, the Giganotosaurus had no natural predators,this means it’s population could grow (Castro). Another interesting…

horns would only be put to use for food or protection. The Triceratops was a very large dinosaur. Its height, weight, and length is often compared to an African Elephant, the largest land animal on Earth. It's average height would range from 9-10 feet tall. That is roughly two times the average height of a matured human. This dinosaurs average weight was about 12,000-26,000 pounds, which is compared to an African Elephants weight at around 12,000 pounds. Also, the length of a…

The Mesozoic Era was a point in time about 252 to about 66 million years ago. During this era, there were three periods. The Triassic period, The Jurassic Period, and The Cretaceous period were all very significant in earth’s evolution. Not just in animals, but in land, plants, climate, and even insects. The Triassic period was the first period of the Mesozoic era and occurred between 251 and 200 million years ago. At this time the earth was very bare. The planet was recovering from an event…

The triceratops was a large, four-legged, plant-eating ceratopsian dinosaur that had a frill of bone at the back of its skull and three distinguished horns on its face. … Triceratops were the most common kind in western North America and Canada. These dinosaurs were one of the last dinosaurs to roam the Western Interior. They lived in the late Cretaceous period, around 145.5 - 65.5 million years ago. Fossils of this species are most commonly recovered in the uppermost Cretaceous deposits of…