Cambrian

In the second part of the lecture, lecturer Michael N Dawson shared with us the information in his research on Jellyfish. Before he jumped into talking about this topic, he first mentioned about the formation of marine lakes. Prior attending to this lecture, I have never heard of Marine Lakes and did not have too in depth knowledge about Jellyfish. However, after I listened to what lecturer Dawson’s presentation, I think the formation of marine lake are fascinating. When see water raised, rushed into cave and brought in animals, marine lakes are formed. For example, as the sea water rises, the marine lakes that are formed later differs than the earlier formed ones. Each marine lakes have chemical differences. Since marine lakes are isolated…

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…

The Cambrian explosion is referred to as “Biological Big Bang” (Science News) or “Evolution’s Big Bang” (Science) (Levinton, J. S.1992), because of the unexpectedness presence of animal life in the Cambrian. Figures have it that it started back 542 million years ago and terminated approximately 40 million years later. This era is marked by the emerging of profuse skeletonized metazoans, an abrupt intensification in biodiversity and the appearance of most modern lives (Von Bloh 18). Animals that…

Around 543 million years ago the Cambrian Explosion occurred, some say it may represent the most important evolutionary event in the history of life on Earth. The “Cambrian Explosion” refers to the rapid appearance of most major living animal body plans in the fossil record within 20 million years or less. This may seem to be a long period of time but is a relatively short in evolutionary history. This swift change in the fossil record appears to be inconsistent with the ideal of the slow…

Cause of the Cambrian Explosion is an article that argues for a combination of factors that lead to the mass growth in animal population 541 million years ago. According to Smith and Harper, scientists have been proposing hypotheses on the cause of this event since the dawn of science. Hypotheses range from explosions in space to “intrinsic genomic reorganization” and many others. Most current ideas fall into three categories. They propose that, “The rapid diversification of animals in the…

The Cambrian Period was an era filled with a massive explosion of a variety of animals and ecosystems. It was a time where super continent Pannotia no longer existed. During this time period, North America remained above water and was eroded by running water. North American was also on the equator which meant warm climate. The continents were oriented very differently, the east coast of North America faced the south. Activities such as transgression of the sea, and carbonate deposition went on…

About 542 million years ago, an event known as 'The Cambrian Explosion' also known as 'Cambrian Radiation' occurred. It began in the Cambrian period which took place during the Paleozoic Era 542-251 million years ago. It is one of the most significant episodes in the history of life (Conway Morris, 2006). The Cambrian Explosion changed everything. Prior to the Cambrian Explosion, large animals were soft-bodied. Palaeontologists discovered fossils which accounted for approximately half of all…

The uplift brought Cambrian Wilberns rocks to the surface, which is where almost every study of the Wilberns is located (Barnes and Bell, 1977). The Llano uplift area contains a wide swath of central Texas, from Concho County in the west, to Travis County in the east. The western Llano Uplift area contains numerous outcrops of…

The Cambrian explosion is perhaps one of the most impactful events in evolutionary history, it gives way to present day animals in fossilized forms which we now use to understand a time period that was much more complex. The period occurred 535-525 million years ago, and was a time where the majority of animals were soft bodied and appeared to be grazers, suspension feeders as well as scavengers. The Cambrian explosion occurred and with it extinctions of many of the soft bodied animals. Those…

Cambrian student council president has big plans ahead of her Cambrian president helps student life. By Lindsay Lemieux, Special to Cambrian News Hound Thursday, October 22, 2015 1:45:16 EDT AM Rhaili Champaigne, holding her Student Member of the Year Award at the Canadian Organization of Campus Activities (COCA) Conference in Edmonton. (Photo/ Miranda Underwood) SUDBURY, ON— Even though Rhaili is in charge of student government, she sees it as a stepping stone into public relations, not…