The Cretaceous-Tertiary Mass Extinction

8. The periods in which there were mass extinctions are Permian – volcanic eruptions which spewed lava and put CO2 into the air which warmed the climate an estimated 6 degrees Celsius. The resulting of oxygen deficiency. And Cretaceous – asteroid or comet

I recently experienced working with a family case manager that would continuously engage in one-way communication with me and the rest of the team working on a particular case. The client had several mental health issues that were not being addressed which caused her to be an extremely difficult client to work with, especially in the beginning. It was not unusual for her to verbally abuse individuals on the team including the family case manager. A large part of these behaviors stemmed from the client’s lack of ability to accept accountability as her children were removed because of domestic violence. As I worked with the client after approximately four months I was able to build rapport with her that others were not able to. I conducted her

The Cretaceous period is a period of time within the Mesozoic Era lasting from 146 million years ago to 65.5 million years ago. It is one of three periods in the Mesozoic Era along with the Triassic and Jurassic periods. The Cretaceous period is well known for the amount of dinosaurs it had, and the event that put an end to the dinosaurs reign, the K-T mass extinction. During the K-T mass extinction, a huge asteroid hit earth and caused tons of dust to infiltrate the air. Only a small portion of dinosaurs died on impact Instead, the dust blocked out sunlight which caused plants to die. Without plants, many dinosaurs did not have a food source, so the died out. Carnivore dinosaurs, such as the Tyrannosaurus Rex, survived a little longer

Dinosaurs ruled the earth for over 65 million years and thankfully for the human race, they became extinct. Ultimately, only a major catastrophe could completely wipe out an entire species, let alone an entity of dinosaurs and the debacle on the causes of dinosaur extinction have flooded the minds of paleontologists for centuries. Geologist and zoologist Stephen Jay Gould published “Sex, Drugs, Disasters, and the Extinction of Dinosaurs,” to compare scientific and speculative causes of dinosaur decimation. Personally, I found this passage very informational and enjoyed reading it. Gould provides three theories that capture the reader’s curiosity, allowing room for pondering in one’s mind.

In 1947 Clair "Pat" Patterson began to calculate the age of the Earth by the request of Harrison Brown at the University of Chicago. The age of the Earth was always questionable to historians before Pat Patterson. In 1650 James Usher Archbishop of Ireland accepted biblical views as authoritative and used events from the old testament to calculate the age of the Earth. His calculations gave him the result of Saturday October 22, 4004 B.C. at six o' clock P.M. Scientists after that began to try and measure the sediments of rock in the Earth but their calculations varied too widely from three million to fifteen billion years. It was then discovered that by calculating the amount of lead in meteorites you will be able to see exactly how old the Earth really is.

Throughout history, science has always faced challenges from outside groups who work to mold science to their beliefs, ignoring evidence and commonly held facts. Following in the legacy of the flat world and an Earth centered Universe, young Earth creationists bend science to fit their explanations of the Earth’s origin and timeline. Evidence for the ancient age of the Earth is present in every discipline of Earth science and directly refutes claims made by young Earth creationists. It is important to examine these claims and rebut them, as their denial of proper scientific understanding hampers progress and has wider implications for the future of our society.

Many Christians believe that the age of the earth is a side issue, of non doctrinal importance, that one can believe in an old or young universe. The Christian apologist William Lang Craig believes that it hurts Christianity when Christians hold to a young earth position (Craig holds to a local flood as many other Christian apologist and Christian). The reason they give is that it is not scientifically possible, others have posited that it hurts the gospel message. Others have said young earth believers unwittingly damage Christianity 's

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.

The Cretaceous-Tertiary extinction, also known as the K-T extinction, was a global extinction event that struck the Yucatan Peninsula at the end of the end of the Mesozoic Era, 65 million years ago. Walter Alvarez first discovered a meteorite big enough to be called a small asteroid that hit the Earth, creating the Chicxulub crater. Once the asteroid struck the North American continent, there were igneous rocks underneath the crater that contained high levels of a rare siderophile element, iridium. This catrostopic event had a massive effect on the environment, as several mammals, birds, and plants became extinct. It also caused an impact winter that made it impossible for plants and plankton to photosynthesis, as 75% of inland animals and 90% of marine species were affected. Not only did it cause an impact winter, but the asteroid also caused volcanic eruptions, climate change and sea level rise. Geologists have also found rich dinosaur, plant and marine fossils to illustrate the K-T extinction. This event not only caused species to become extinct, but it also had an adaptive radiation, as other species were able to diversify.

The warming of the Earth’s climate, the changes of waves in the oceans and the increased amount of carbon dioxide from volcanic activity and Siberian traps caused this mass extinction. Oxygen on Earth is essential for all living things to survive on Earth. Without oxygen all living things would parish. When the carbon dioxide levels rose, the oxygen levels dropped substantially. How do we

Over 98% of all organisms that have lived on Earth are now extinct. A mass extinction event occurs when a large number of species die out within a small time frame (relative to the age of Earth). Mass extinctions are intensively studied for both cause and effect, as there is usually room for debate regarding catalysts that precede the extinction and the massive influx of new biological species that follows. There have been five major mass extinctions, dubbed the “Big Five,” that have wiped out at least 50% of the species living at those times. The most well known mass extinction of the Big Five, with the decimation of every species of non-avian dinosaur, is the Cretaceous-Paleogene

“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…”

Ever since the history of Earth has been studied using fossil records, extinctions have always been the object of fascination and interest, particularly the mass extinctions that occurred throughout Earth's history. A mass extinction can be caused by disruptive global environmental changes, where large numbers of species have become extinct (Urry et al. 2008). There have been five major extinctions documented based on fossil records over the past 500 million years, but the Cretaceous (KT boundary extinction – a name that meant it began the Tertiary era) extinction caught a lot of

For decades the age of the Earth has been a major conflict between science and religion, but why is it such a big conflict? If, in the year AD 1600, an individual had asked an educated European how old the planet Earth was and to recount its history, the response would have been that it was about 6000 years old and that its ancient history was given by the biblical account in Genesis (Changing Views of the History of the Earth). If one asked the same question of an educated European in AD 1900, one would have received a totally different answer (Changing Views of the History of the Earth). The answer would have been the Earth was ancient, there had not been a Noachian flood, and that the species of life had not been fixed over the history of Earth (Changing Views of the History of the Earth). In short, Genesis was an allegory and not literal history (Changing Views of the History of the Earth). This brings up the different views between “young earth creationists” and “old earth creationists” and those that support an infinite universe. The problem today is each side contains major valid points of evidence of both biblical and scientific, on the age of the planet Earth.

Rapid climate change also ends up on the suspect list of possible dinosaur extinction events. During the latter part of the Cretaceous Period continents broke up causing volcanoes to erupt and fill the sky with gas and ash resulting in a drastic climate change (“Dinosaurs Climate Change and Biodiversity”). The shifting of continents changed the Earth’s landscape, altering weather patterns and overall climate (“Dinosaur Extinction Theories”). Also, over a long period of time, climate gradually changed. Ocean habits changed, temperatures grew much more extreme causing scorching summers and frigid winters (Norell, Dingus, and Gaffney). Radical temperature changes like these led to a green-house effect, making life for the dinosaurs a lot