Objectives Geological mapping forms the cornerstone of exploration Geology, and is a fundamental skill that all Geology students must learn. The University of Leeds has constructed several virtual mapping projects that mimic the kinds of observations and measurements that you need to make in the field in order to construct a Geological map. While such programs will never replace actual field mapping, they do form excellent learning opportunities that will help prepare you for the field. Tasks Access the mapping program at: https://www.see.leeds.ac.uk/virtual-landscapes/

 

The virtual landscape you will be completing for this project is Lighthouse Bay. Please select this in the opening screen. Note that this program will load and run in Chrome, Firefox, and Safari, but not Windows Explorer. The program can be downloaded and installed on Windows and Mac machines, but this is not necessary, as the program will run through your browser. The opening screen will show what you see from where you are standing. The shortcuts to moving around and doing different things are: Arrow Keys – movement Space Bar – jump Mouse – look Mouse Key Down – rotate map in overview T – toggle between world to topographic map G – toggle gps for position C – toggle compass Your mission is to explore the landscape and prepare a Geological map, cross-section and stratigraphic column of the area. Two maps have been posted

: (1) Lighthouse Bay Topo Map 1

 

This map is what you will use to navigate the area. Contour lines are indicated, and outcrops appear as small green circles. A location grid has been established as well, and you will find Eastings along the bottom of the map, and Northings up along the left side. By using your GPS unit, and consulting this map, you will be able to locate yourself easily.

(2) Lighthouse Bay Topo Map 2

 

This is the map that you will print out, and upon which you will construct your Geological map. You must walk the area, and visit all of the outcrops. Clicking on the outcrops will bring up your field notebook, which will describe what you are seeing, and provide some structural measurements as well. You can drag the notebook across the screen to see it all, then when you are done, click the red X at the lower right of the notebook itself. Make your own notes from these notes, and make sure to put indications on the map as to what lithology you have discovered at each outcrop, to facilitate your mapping. Once you have visited all of the outcrops, you can begin drawing contacts. Note that you will need to establish strike line grids for each contact (use tracing paper) so that you can accurately draw in the outcrop pattern.

Make sure to include a legend with the map. Your completed Geological map should be coloured. Construct a Geological cross-section along the 1700 metre Easting line (which runs northsouth across the map), with the north side to the left in your cross-section. Do not forget LOTS: legend, orientation, title and scale, what every cross-section must possess. Determine the thickness of each formation, including minimum thicknesses for any formations that are not constrained. Use tracing paper and strike lines to calculate thicknesses, do not just measure them from your cross-section (which isn’t as accurate anyway). Finally, construct a simplified stratigraphic column, to scale. An example of a stratigraphic column has been posted for you on Blackboard (Stratigraphic Column Example.pdf): follow this style (though they have excluded a title and scale). You should have a title, a scale, and each formation should have a concise description next to it on the right-hand side. Use the same colour scheme you used for your Geological map for your cross-section.

Environmental geology