First, many things contributed to the environment the Ordovician Period had. “Areas north of the tropics was almost entirely ocean; most of the world’s land was assembled into the southern supercontinent Gondwana. Gondwana shifted towards the South Pole and much of it was inundated underwater throughout the
Devonian Limestone deposits were the major even in the Ordovician period. However, the climatic condition during the Ordovician period favored sediments disintegration. As a result, seabed were eroded with marine shale and fossiliferous sediments. Consequently, huge carbonate deposits in the Ohio Shale marked the era. The Devonian period was characterized by shale and limestone deposits in Central, northeastern and western Ohio.
Hurricane Grace was a category 2 hurricane that was short lived in 1991. It emerged from a cold front that left the East coast of the United States. On October 28th a extratropical cyclone progressed along a cold front to the East of Nova Scotia. On Oct 27th, Hurricane Grace developed from a pre existing subtropical storm and was originally moving northeastward, had made a turn and headed east. Hurricane Grace was drifted upwards by its cold front into a warm zone of circulation of the deep cyclone on Oct 29th.
During the Cambrian Period a lot of things happened both geologically and biologically. The Cambrian Period was the first period of the Paleozoic Era, it lasted from 570 million years ago to 500 million years ago, 70 million years. ItÂ¹s very important because it corresponds with the firs t appearance of abundant fossils especially Trilobites, which characterizes a succeeding point in time. During the Cambrian Period the lapetus Ocean appeared, the predecessor of the Atlantic Ocean, which separated the young North American and Eurasian continents. Also Gondwanaland was in the final stages of development.
That means it will take a very long time for the sunlight to travel to Uranus ( It takes 2 hours and 40 minutes). The surface gravity on Uranus is around 86% so if you weigt 100 kg you will have a weight of 86 kg. It is surrounded by wire-like strings of dark ice particles. In Uranus atmosphere there have’nt been so many cloud seen ( just a few white clouds). Uranus has got a temperature around -224°C.
*These small creatures, the so called mammals had efficient mechanism of regulating body temperature,well developed nervous system and efficient power of swift movement . *These features helped them to survive in the changing environment. *Thus mammals came into existence due to great climatic fluctuation from Permian to Jurassic (periodic aridity alternating with glacial periods). *Since mammal-like reptiles were abundant in Permian and in early Triassic period, they must have originated in late Permian or early
There are 4 types of air masses, there is the maritime tropical, continental tropical, maritime polar, and continental polar. . Maritime tropical air masses form over the Pacific and Atlantic ocean also over the gulf of Mexico. In the summer they bring hot and humid weather and in the winter they bring heavy rain or snow. Continental tropical air masses are formed in the southwest and northern Mexico and bring hot and dry climate.
The geologic time scale subdivides the 4.6 billion years of the earth history into a hierarchy of time periods corresponding to the history of the earth formation (Canada 2010). The Precambrian era began with the formation of the Earth and followed by the Paleozoic, Mesozoic, and Cenozoic eras. Each of these eras is divided into periods, the periods into epochs, and epochs into ages (Canada 2010). Geologically, Canada is one of the oldest countries in the world, and Precambrian rocks extend over more than half of Canada (Wallace 1948). Three significant geological events governed the geological formation of Canada, namely the shield formation, mountains formation from sediments accumulated in basins in the region of the margins of the Shield,
The definition of a fossil "Is remains of an organism preserved in a petrified form or as a mold or cast in the rock." The marine layer is a fossil layer found in the Grand Canyon. The marine layer consists of Stromatolites, which is the oldest fossil at the Grand Canyon. Trilobites are extinct marine anthropoids. Trilobites are found in the Tonto Group, Crinoids, Brachiopods the most common animal in the seas, Bryozoans, Corals, Sponges, and Burrows.
What is the difference between the two temperatures given for Alexander Bay? 6. What is the difference between the two temperatures given for De Aar? 7. Based on your own experience, at what time of day is it usually the coldest?