Cretaceous

magnitude of extinctions: simple counting, percent extinctions, total and per family extinction. From the percent extinction measurement, he identified five deadly mass extinctions at Late Ordovician, Late Devonian, Late Permian, Late Triassic, and Late Cretaceous. These five big mass extinctions were mentioned also by Erwin (2001) and Barnosky et al. (2011). Barnosky et al. (2011) measured the big five mass extinctions based on proportional rate (number of species extinct/time) and magnitude (%…

Way back when, humanity had such a strong past. Nothing appeared. Time was time. Nothing is nothing. The four eras that made history. Precambrian, Paleozoic, Mesozoic, Cenozoic. Historians and Scientists, did research for years and years. What happened during the Precambrian Era, nobody had a clue. Until humans researched the resources left behind. Back in the Precambrian Era . Earth was born. 4.6 million years ago, not even that many.! Stars and the planets were too! Rocks and much…

Canadian oil boom Great or Horrible “It a choice between starving or being poisoned” says a local doctor The canadian oil boom is the canadian companies are using oil sands to make oil and it is very poisonous.Canadian oil boom profitable but dangerous these are some things you may ask What are oil sands?What’s crude oil?Where did they come from? So you may ask what are oil sands? According to www.enr.gov.nt.ca Oil sands are a mixture of sand, water, clay and bitumen. Bitumen is oil that…

out as an interest in the magnetic flip-flops in the sedimentary rocks of the Italian Apennine Mountains, Alverez’s surprising observations quickly spurred several other questions. These questions regarding the “KT” boundary (boundary between the Cretaceous and Tertiary periods) led Alverez to ponder further questions which he had never previously considered. These questions and inspiration he found in his research helped him and his team to gather data, develop various hypotheses, publishes…

Diego is known for having the best weather in the United States, which it can attribute to its geology. San Diego is also well known for consistent droughts; however, its current unique geography is a result of ancient rivers and seas depositing Cretaceous and Tertiary sedimentary rocks. As a result of these ancient rivers, “San Diego County can be divided between three distinct geomorphic regions: the Coastal Plain region as exposed west of the Peninsular Ranges, the Peninsular Range region,…

Chapter One: The author grew up in Kenya, a place which developed his love of nature and all the flora and fauna within it and provided a chance for that love to grow. His parents were both passionate naturalists, especially his father. He was taught to love fossils because of his parents love for them. Because of being raised in the wild, he has always been drawn to it. When he was younger, he would sell bones to museums. This job helped him to prepare for his future specialty in…

For their most recent paper, the team examined more dinosaur jaw fossils and found two other theropods that underwent transformations similar to Limusaurus. The two theropods were an early Cretaceous bird called Sapeornis and a small caenagnathid oviraptorosaur. These findings demonstrate an evolutionary process of the beak for the first time. The team wanted to further support their hypothesis so they performed a comparative and statistical…

Trans-Pecos Province Magma Types Nathanial Matis 01/12/2014 Trans-Pecos Province Magma Types Nathanial Matis Abstract The Cretaceous was the starting point when the Laramide Orogeny began to fault and fold as a result of tectonic activity which pushed the Farallon plate into the North American plate forcing the subduction of the Farallon. This subduction caused the plate to melt and form magma that either formed laccoliths, or intruded country rock with different igneous compositions. These…

event due to the fact that there was a drastic regional raise in sea level that corresponded to a dip in global sea level. This transition is a very evident unconformity due to the fact that between the end of the Jurassic and the beginning of the Cretaceous the sediment deposited has evidently seen drastically different depositional environments. This claim is supported…

The most interesting part of the Flint River Aquarium was the planetarium. My first time in the planetarium is when I was very young so I really didn’t understand it. In the planetarium it’s like a movie theater, but instead of looking straight you look upward. They showed us the planets and tested our memory of the moon phases. After the planetarium movie was over we went to the Thronateeska. When we got to the Thronateeska, my group started with archelogy where we had to find ten buried items.…