Essays Tagged: "Cretaceous"
Dinosaurs
. Not all kinds became extinct at once; but the last of the dinosaurs disappeared at the end of the Cretaceous. Many other animal kinds died out at about the same time, including the ichthyosaur, mosa ...
Subjects: Science Essays > Earth Sciences > Geology & Geosciences
Geology of massif montgris
papers and works by previous visitors to the Montgris. The units within the area are from the Upper Cretaceous the Tertiary and the Quaternary. I aim to give an overall guide to the geology on a small ... ining to the Geology. The result was that they brought back a research map that dated the Massif as Cretaceous but suggested it was composed of 1 massive bed. We loosely agreed our study areas and arr ...
Subjects: Science Essays > Earth Sciences > Geology & Geosciences
Dinosaurs
. Not all kinds became extinct at once; but the last of the dinosaurs disappeared at the end of the Cretaceous. Many other animal kinds died out at about the same time, including the ichthyosaur, mosa ...
Subjects: Science Essays > Biology
Extinction
e many other species that were killed off. During what is known as the K-T extinction (K stands for Cretaceous, T stands for Tertiary), many species and families became extinct. These include all mari ... e many other species that were killed off. During what is known as the K-T extinction (K stands for Cretaceous, T stands for Tertiary), many species and families became extinct. These include all mari ...
Subjects: Science Essays > Biology
Humans Extinct? Can it be?
n was so severe that it has defined the boundary between two periods of geologic history called the Cretaceous and the Tertiary periods. All but a few mammals on land and water became extinct. (McLean ... earth. (McLean, 1985, p.1) Then a time of volcanic activity arrived as the Deccan Traps of the late Cretaceous Period erupted and the pieces had almost all fallen in place for a change.Volcanic dust a ...
Subjects: Science Essays > Environmental Science
Extinction
tinction of the dinosaurs the only solid fact is that no trace of dinosaur has been found after the Cretaceous. This calls for ideas of their sudden disappearance, and a great numbers of theories have ... kind of youth-care. And it is the most likely that the bird-like coelurosaurs of Late Jurassic and Cretaceous, defectors from the bird-lineage, were warm-blooded and had a rather high metabolism as w ...
Subjects: Science Essays
Another paper I wrote last semester for MS 2. This one is about creationism v evolutionism.
cental group, to which the majority of living mammals belong. Unlike other placental known from the Cretaceous period, which exhibit adaptations to life on the ground, the newly discovered creature ha ...
Subjects: Humanities Essays
Determining the Age of a Fossil
they originated. Fossil leaves and pollen grains of the first flowering plants date from the early Cretaceous Period, sometime after 138 million years ago. These fossils record only a small number of ... er 138 million years ago. These fossils record only a small number of species. Fossils from the mid-Cretaceous, about 90 million years ago, include a wide variety of flowering plants from many differe ...
Subjects: Science Essays > Earth Sciences > Geology & Geosciences
A short introduction to the study of the extinction of the dinosaurs
theories have been put forward for the mass-extinction about 65 million years ago at the end of the cretaceous period that caused the extinction of the dinosaurs: These range from disease to tropical ... about from guesswork and from a high level of the rare amount Iridium found at the boundary between Cretaceous and Tertiary rocks 65 million years old: this is likely to be caused by either of two thi ...
Subjects: Science Essays > Biology
Opal This essay discusses some characteristics and history of the opal.
or the 13th wedding anniversary. Most opals are between 50-65 million years old, dating back to the Cretaceous period when dinosaurs roamed the earth. Opal formed as silica from decomposing rocks mixe ...
Subjects: Science Essays > Earth Sciences > Geography
Dinosaur Extinction.
in a short time. Some scientists think the dinosaurs disappeared about 65 million years ago in the Cretaceous period. Biblical records show that the earth is about 5,000 years old. The timeline of ho ...
Subjects: Science Essays > Zoology
The Causes of the Dinosaurs’ Extinction
tinctionAbout sixty five million year ago something happened to change the Earth. At the end of the Cretaceous-Tertiary Period seventy-five to eighty percent of all animal species, including dinosaurs ... nct. This event is known as the K-T mass extinction because it occurred at the boundary between the Cretaceous (K) and Tertiary (T) time periods. Although there are numerous theories and explanations ...
Subjects: Science Essays > Earth Sciences