Permian Mass Extinction essays

Permian Mass Extinction essays A mass extinction about 250 million years ago, which destroyed almost of the species on Earth, happened very quickly and it is demonstrated in the fossil record by the collapse of one-celled organisms called protests. Something suddenly killed off more than 90 %of all species on earth, and that led to the age of the dinosaurs. Evidence indicates the massive die-off was linked with an abrupt drop in productivity, the rate at which inorganic carbon is turned into organic carbon through processes such as photosynthesis. Terrestrial faunal diversification occurred in the Permian and 90-95% of marine species became extinct. Among terrestrial fauna affected included insects, amphibians, reptiles and mammal-like reptiles. The terrestrial flora was predominately composed of gymnosperms, including conifers. Life in the sea consisted of common groups of brachiopods, bony fish, sharks and fuslinid. Corals and trilobites were also present, but were exceedingly rare. During the Permian period all the worlds land masses joined together into a single super continent named Pangaea. The collision between Laurasia and Siberia-Kazakhstania and China finalized and assembled into Pangaea by the end of Permian. This was the first time since the late Protrusion super continent of Rodina that such a landmass had formed. Pangea was shaped sort of like a giant pacman with the mouth on the east. There was a corresponding large single ocean, called Pathalassa. The body of water enclosed by the pacman mouth constituted a smaller area, the Tethys, which covered much of what is now southern and central Europe. Throughout the Permian, Europe was covered by a very salty inland sea, the Zechstein Sea, which advanced and receded at least twice. This was home to an impoverished fauna, mainly brachiopods and bivalves, which were able to cope with the hyper saline conditions. ...

Events Leading to the Scramble for Africa

Events Leading to the Scramble for Africa The Scramble for Africa (1880–1900) was a period of rapid colonization of the African continent by European powers. But it wouldnt have happened except for the particular economic, social, and military evolution Europe was going through. Europeans in Africa up to the 1880s By the beginning of the 1880s, only a small part of Africa was under European rule, and that area was largely restricted to the coast and a short distance inland along major rivers such as the Niger and the Congo. Britain had Freetown in Sierra Leone, forts along the coast of The Gambia, a presence at Lagos, the Gold Coast protectorate, and a fairly major set of colonies in Southern Africa (Cape Colony, Natal, and the Transvaal which it had annexed in 1877).Southern Africa also had the independent Boer Oranje-Vrystaat (Orange Free State).France had settlements at Dakar and St Louis in Senegal and had penetrated a fair distance up the river Senegal, the Assinie, and Grand Bassam regions of Cote dIvoire, a protectorate over the coastal region of Dahomey (now Benin), and had begun colonization of Algeria as early as 1830.Portugal had long-established bases in Angola (first arriving in 1482, and subsequently retaking the port of Luanda from the Dutch in 1648) and Mozambique (first arriving in 1498 and creating trading posts by 1505).Spain had small enclaves in northwest Africa at Ceuta and Melilla (frica Septentrional Espaà ±ola or Spanish North Africa).The Ottoman Turks controlled Egypt, Libya, and Tunisia (the strength of Ottoman rule varied greatly). Causes of the Scramble for Africa There were several factors that created the impetus for the Scramble for Africa, and most of these were to do with events in Europe rather than in Africa. End of the Slave Trade:  Britain had had some success in halting the slave trade around the shores of Africa, but inland the story was different. Muslim traders from north of the Sahara and on the East Coast still traded inland, and many local chiefs were reluctant to give up the use of slaves. Reports of slaving trips and markets were brought back to Europe by various explorers such as David Livingstone, and abolitionists in Britain and Europe were calling for more to be done.Exploration:  During the 19th century, barely a year went by without a European expedition into Africa. The boom in exploration was triggered to a great extent by the creation of the African Association by wealthy Englishmen in 1788, who wanted someone to find the fabled city of Timbuktu and chart the course of the Niger River. As the 19th century wore on, the goal of the European explorer changed, and rather than traveling out of pure curiosity they began to record details of markets, goods, and resources for the wealthy philanthropists who financed their trips. Henry Morton Stanley:  This naturalized American (born in Wales) was the explorer most closely connected to the start of the Scramble for Africa. Stanley had crossed the continent and located the missing Livingstone, but he is more infamously known for his explorations on behalf of King Leopold II of Belgium. Leopold hired Stanley to obtain treaties with local chieftains along the course of the River Congo with an eye on creating his own colony. Belgium was not in a financial position to fund a colony at that time. Stanleys work triggered a rush of European explorers such as the German journalist Carl Peters to do the same for various European countries.Capitalism:  The end of European trading in slaves left a need for commerce between Europe and Africa. Capitalists may have seen the light over slavery, but they still wanted to exploit the continent. New legitimate trade would be encouraged. Explorers located vast reserves of raw materials, plotted the course of trade routes, nav igated rivers, and identified population centers that could serve as markets for manufactured goods from Europe. It was a time of plantations and cash crops, when the regions workforce was put to work to producing rubber, coffee, sugar, palm oil, timber, etc for Europe. And the benefits were more enticing if a colony could be set up, which gave the European nation a monopoly. Steam Engines and Iron Hulled Boats:  In 1840, the  first British ocean-going iron warship called Nemesis  arrived at Macao, south China. It changed the face of international relations between Europe and the rest of the world. The  Nemesis  had a shallow draft (five feet), a hull of iron, and two powerful steam engines. It could navigate the non-tidal sections of rivers, allowing inland access, and it was heavily armed. Livingstone used a steamer to travel up the Zambezi River in 1858 and had the parts transported overland to Lake Nyassa. Steamers also allowed Henry Morton Stanley and Pierre Savorgnan de Brazza to explore the Congo.Quinine and Medical Advances:  Africa, especially the western regions, was known as the White Mans Grave because of the danger of two diseases: malaria and yellow fever. During the 18th century, only one in 10 Europeans sent out to the continent by the Royal African Company survived. Six of the 10 died in their first year. In 1817, French scien tists Pierre-Joseph Pelletier and Joseph Bienaimà © Caventou extracted quinine from the bark of the South American cinchona tree. It proved to be the solution to malaria; Europeans could now survive the  ravages of the disease  in Africa. Unfortunately,  yellow fever  continued to be a problem, and even today there is no specific treatment for the disease. Politics:  After the creation of a unified Germany (1871) and Italy (a longer process, but its capital relocated to Rome in 1871) there was no room left in Europe for expansion. Britain, France, and Germany were in an intricate political dance, trying to maintain their dominance, and an overseas empire would secure it. France, which had lost two provinces to Germany in 1870, looked to Africa to gain more territory. Britain looked toward Egypt and the control of the Suez Canal as well as pursuing territory in gold-rich southern Africa. Germany, under the expert management of  Chancellor Bismarck, had come late to the idea of overseas colonies but was now fully convinced of their worth. All that was needed was some mechanism to be put in place to stop overt conflict over the coming land grab.Military Innovation: At the beginning of the 19th century, Europe was only marginally ahead of Africa in terms of available weapons, as traders had long supplied them to local chiefs and many h ad stockpiles of guns and gunpowder. But two innovations gave Europe a massive advantage. In the late 1860s, percussion caps were being incorporated into cartridges. What previously came as a separate bullet, powder, and wadding was now a single entity, easily transported and relatively weatherproof. The second innovation was the breech-loading rifle. Older model muskets, held by most Africans, were front loaders, which were slow to use (maximum of three rounds per minute) and had to be loaded while standing. Breech-loading guns, in comparison, could be fired between two to four times faster and could be loaded even in a prone position. Europeans, with an eye to colonization and conquest, restricted the sale of the new weaponry to Africa maintaining military superiority. The Mad Rush Into Africa in the Early 1880s Within just 20 years, the political face of Africa had changed, with only Liberia (a colony run by ex-African-American slaves) and Ethiopia remaining free of European control. The start of the 1880s saw a rapid increase in European nations claiming territory in Africa: In 1880, the region to the north of the river Congo became a French protectorate following a treaty between the King of the Bateke, Makoko, and the explorer Pierre Savorgnan de Brazza.In 1881, Tunisia became a French protectorate and the Transvaal regained its independence.In 1882, Britain occupied Egypt (France pulled out of joint occupation), and Italy began colonization of Eritrea.In 1884, British and French Somaliland were created.In 1884,  German South West Africa, Cameroon, German East Africa, and Togo were created and Rà ­o de Oro claimed by Spain. Europeans Set the Rules for Dividing up the Continent The  Berlin Conference of 1884–1885  (and the resultant  General Act of the Conference at Berlin) laid down ground rules for the further partitioning of Africa. Navigation on the Niger and Congo rivers was to be free to all, and to declare a protectorate over a region the European colonizer must show effective occupancy and develop a sphere of influence. The floodgates of European colonization had opened. Sources and Further Reading Bryceson, Deborah Fahy. The Scramble in Africa: Reorienting Rural Livelihoods. World Development 30.5 (2002): 725–39.Chamberlain, Muriel Evelyn. The Scramble for Africa, 3rd ed. London: Routledge, 2010.Michalopoulos, Stelios, and Elias Papaioannou. The Long-Run Effects of the Scramble for Africa. American Economic Review 106.7 (2016): 1802–48.Pakenham, Thomas. The Scramble For Africa. Little, Brown: 2015.