This lab’s exercise is to be completed and submitted before your next lab. Submit your file to YOUR lab section’s DropBox! Review In week one of Laboratory Exercise Three we: (i) reviewed the distribution of surficial materials and physiographic features (landforms) across southern Ontario, and (ii) illustrated the use of Google Earth to help us depict the distribution of those features, materials, terrain and drainage attributes, and (iii) you may have examined the pattern and timing of the deglaciation of southern Ontario at the end of the Wisconsinan glaciation. Below are a series of questions arising from the work we reviewed in week one of the lab, and you will be required to make investigative inquiries yourself this week. Section One Start Google Earth and load the files that we used in week 1 of Lab 3. In the Lab 3 folder there is a Google Earth file called ‘Lab 3 Locations Section 1′. Open that file in Google Earth. There are six locations in that file shown as placemarks, each can be toggled on or off. Double clicking on a location in the table of contents will move you to that position. If you highlight a location and right click you can select Properties, this will open the Edit Placemark box, from that box you can get the exact coordinate of each location in decimal degrees. *In ArcMap you can use the GoTo tool and using the coordinate navigate to the exact locations shown in Google Earth. For each of the six locations you will identify the type(s) of surficial materials, the physiographic feature(s) present, and determine the time period (in thousands of carbon 14 years BP) that the location was no longer under ice using the .bmp files that show the deglaciation from the Wisconsin Glacial Episode. (MyLS Folder “Lab 3 Ice Image Maps) You will also be asked to infer the permeability of the surficial materials and provide a statement that describes the terrain (topography) and any relevant drainage characteristics. There are also some additional questions on specific sites. Section Two There is a second Google Earth file in the Lab 3 folder called ‘Lab 3 Locations Section 2′. Open that file in Google Earth. There are several labels that depict some of the larger moraine landforms in southern Ontario. The moraines included are called: Wyoming, Paris, Galt, Williscroft-Banks, Orangeville, Oak Ridges, and Dummer Moraine. For each of these locations, determine the coordinates. These moraines are large features, the coordinates are simply to bring you the locations of the moraine. Do not just consider the attributes at the specific locations of the markers, you must treat the moraines as a larger feature. For each of these moraines you will identify: (i) the major types of surficial materials that comprise them, (ii) the type of moraine they represent (based on the physiography), and (iii) you will estimate when these moraines were formed. There are also some specific questions regarding some of these individual features. Review the materials in the background handout for lab 3 as well as the materials in Tenhaild Chapter 6. Recall that each moraine is formed at an ice marginal position, at the terminus of a portion of the ice sheet. The orientation, extent and position of the moraines can give
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