Cambrian explosion

Ammonite taxa often occur in narrow time ranges, arguably making them the best index fossils to determine the ages of strata of certain time intervals (Callomon, 2003). The fossil remnants of ammonites act as the major basis for the identification of Jurassic and Cretaceous strata in the Sverdrup Basin, reinforced by the presence of bivalves, dinoflagellates, and foraminifera (Galloway et al., 2013). While macrofossils such as ammonites are used to define every stage of the Jurassic and Cretaceous

In 2005, Palaeontologist Mary Schweitzer and her team made the discovery of finding original soft tissue, including blood vessels, in a Tyrannosaurus Rex fossil in Montana. Many of Schweitzer's fellow scientists insisted that she had been mistaken because of previous theories of how fossils were preserved. The fossil was buried in a permeable sandstone, where groundwater could get in. Since organic material is quickly broken down in water, the soft tissue should have decayed quickly under the conditions

the military; it also offers a chance for travel and more job opportunities; and it can be a very fun and rewarding career. Where else can you blow stuff up and call it a job? I have always enjoyed playing with fireworks as a child and watching explosions in videos. With this job, I would get to enjoy it and get paid. The career I picked was an Explosive Worker and my personality test came back with me being "The Duty Fulfiller." According to my personality test, I am interested in security and peaceful

public to withstand forces from nearby explosions. This need is due to the recent climb in terrorist attacks in urban or crowded environments. These attacks have used the lack of blast resistance in these buildings as a means for creating widespread havoc through detonating an improvised explosive device (IED). These devices range from explosives planted inside a structure to roadside or vehicular bombs. An urban environment causes even relatively small explosions to be extremely potent

only looking for a head of lettuce, is blown up by a minefield. The word choice and imagery in the poem consequently conveys the vision of the minefield explosion (by the father) being unleashed through the acts of fury and violence towards his children. Word choice conveys this vision through explicit yet traumatic experiences with the past explosion by referencing how, only fourteen, innocent, hungry, and under good intention, was the friend blown up. For example, on the first two lines of stanza

notorious Smithsonian Secretary (Adler 2013). According to Haug, Caron, and Haug in their research article ‘Demecology in the Cambrian: Synchronized Molting in Arthropods from the Burgess Shale’ the Burgess is “arguably the best-known Konservat-Lagerstätte”. While the Burgess Shale is primarily known for the intricate preservation of soft-bodied creatures dating from the early Cambrian Period (Haug, Caron, Haug 2013); furthermore, what seems to make this specific site so special is the fact that not only

taken millions of years to take its present form. In this paper, we examining the geological history of the valley and its alluvia fan formation. Precambrian and early Phanerozoic Age I. Pre-Cambrian Age In Pre-Cambrian time, Death Valley landscape was much different than what is today. The Pre-Cambrian eon is

There are over 80 ghost towns in Oregon making it the best state for ghost towns. Some are populated but others are completely abandoned. Many are historic, some are mining towns, others are Indian villages, and several are haunted. A few of them are found along the historic Lewis and Clark trail and they all have a little something interested from Oregon’s early history. Some of the most known ghost towns are: Shaniko, Boyd, Dufur, Mayer, Lonerock, Danner, Kingsley, Bourne, Friend, Fossil, Spray

During the Paleozoic brachiopods were a highly diverse and abundant phylum, dominating the fauna and subsequently the fossil record for millions of years (Topper). Brachiopods have two valves with bilateral symmetry and are sessile benthic marine organisms that obtain energy through filter feeding by means of a structure called a lophophore. They occupied various marine ecological niches throughout the Paleozoic, with the shell morphology generally indicating the life habit of the organism (I just

Short Story Essay by: Preston Grand The characters from The Man Who Had No Eyes. Mr. Parsons and Mr. Markwardt. Were both in a chemical explosion and meet fourteen years later. They have a conversation without knowing one and the other are blind. It illustrates false assumptions can be dangerous. One must have your facts straight. It also compares both characters. Mr. Parsons was the protagonist of the story. He was a clean shaven man with a cane and nice suit. Mr. Parsons was staying in a hotel