Retrieved February 25, 2010, from http://www.ucmp.berkeley.edu/geology/techist.html. USGS.GOV. (2009). Historical perspective [This Dynamic Earth, USGS]. (n.d.).
Beginning in 1960 with an expedition lead by a man named Spitzbergen, fossilized footprints from non-avian dinosaur showed the region once had a drastically different climate. In the years that followed more fossilized remains were collected in costly expeditions, often to remote areas near the north and South Pole. However, each find can present unique information about physiological adaptations various forms of life made to polar latitude temperatures during the Mesozoic era. An article “Polar Dinosaurs” by Thomas H. Rich in Science, published in February of 2002, explores the fossil evidence and presents the following ideas about the environment and the types of creatures who lived and adapted to the seasonal conditions present at these polar latitudes. The ice fields of the North Slope of Alaska we know today are thought to have had temperatures ranging from 13-2 degrees Celsius during the Cretaceous period.
When it came to rock structures, Wegener looked for the similarities of the rocks found along coastlines and the mountain belts found on the continents. They looked at the mountain belts of the Appalachian Mountains and the Caledonian Mountains in Scandinavia and the British Isles. These two continuous belts contained similar rock structures and the ages of these rocks matched the on both ends of the African and South American continents. Wegener also found evidence of massive climatic changes. He researched and found out that ancient glacial deposits were found indicating that ice sheets covered a large part of the Southern Hemisphere, India and Australia.
Traveling north on an Indian trail, the first sign of the area’s cataclysmic past would have appeared out of place from the rolling hills typical of the Western Pennsylvanian landscape. Peering down into a valley over 400 feet deep, the mighty gorge was littered with enormous boulders, thus framing the Slippery Rock Creek. These relict boulders of rock types foreign to the area are known as “glacial erratics” and are indicative of the strength of the encroaching glacier. As defined by the National Snow and Ice Data Center, “Glacial erratics are stones and rocks that were transported by a glacier, and then left behind after the glacier melted. Erratics can be carried for hundreds of kilometers, and can range in size from pebbles to large boulders.
This flat surface would become covered with shallow seas and rocks from the Paleozoic period and would be deposited and eventually cover the surface. There is... ... middle of paper ... ...sted of tents and then tents became ranches and farms. Forts and train stations eventually grew into towns and some towns were then able to grow into cities. Works Cited http://traveltips.usatoday.com/physical-characteristics-colorado-rocky-mountains-56639.html http://cires.colorado.edu/news/press/2011/rockies-origin.html http://www.nature.nps.gov/geology/parks/romo/ http://www.mountainnature.com/Ecology/ http://www.mountainnature.com/Wildlife/WildlifeEcology.htm http://www.frommers.com/destinations/rocky-mountain-national-park/787037 This article incorporates public domain material from the United States Geological Survey document: T.J. Stohlgren. "Rocky Mountains".
Retrieved September 22, 2017, from http://imnh.isu.edu/digitalatlas/geo/basics/diagrams.htm Molina-Walters, D., & Cox, J. (2009). Chipping away at the rock cycle. Science Scope, 32(6), 66-68. Retrieved from http://nclive.org/cgi-bin/nclsm?url=http://search.proquest.com/docview/226001168?accountid=9834 Frack, S., & Blanchard, S. A.
Prairie Potholes: are mostly located in the United States but never the less part of the prairie eco zone Maria: Glaciation assisted in forming the shape of the prairies. Glaciation is the formation or the movement of glaciers. The glaciers helped flattened the land. Abby: The prairie landform consists of many layers of sedimentary rocks. Also the rivers the major rivers that flow in the Prairie are originated in the Rocky Mountains.
Mono-Inyo Craters. Last updated 11/09/01. http://vulcan.wr.usgs.gov/livingwith/volcanicpast/places/volcanic_past_long_valey.html. U.S. Department of Agriculture. Mono Basin.
Moving Mountains. Retrieved March 19, 2014, from http://www.orionmagazine.org/index.php/articles/article/166/ Ritter, J. (2007). Soil Erosion – Causes and Effects. Retrieved March 26, 2014, from http://www.omafra.gov.on.ca/english/engineer/facts/12-053.htm Shnayerson, M. (2008).
Lithosphere, vol. 1, p. 337-342. Van Staal, C.R., Whalen, J.B., Valverde-Vaquero, P., Zagorevski, A., and Rogers, N. (2009) Pre-Carboniferous, Episodic Accretion-Related, Orogenesis along the Laurentian Margin of the Northern Appalachians. Geological Society, London, Special Publications, vol. 327, p. 271-316.