Geologic Map of Circleville Quad
You will work in teams for this, as shown below, but I also want each of you to have some exposure to the different aspects of the process---you won't learn anything if you don't participate. Nonetheless, the final map will be a complilation and there will be one final map for each team. The teams are:
| Student | Circleville Quad |
| Croy, Marina E. | Team 1 |
| Culbertson, Haley R. | Team 2 |
| Freeman, David M. | Team 3 |
| Gentry, William A. | Team 2 |
| Luke, Robert A. | Team 3 |
| Manley, Duncan Y. | Team 3 |
| Salchert, William A. | Team 1 |
| Stern, Haley E. | Team 2 |
| Tidwell, James H. | Team 1 |
You will be making a geologic map of the Circleville quad based on your hand-sample and outcrop observations, in addition to a high-resolution lidar-derived digital elevation model. You will use the formations as defined on the West Virginia Geologic map that you have a paper copy of. The starting point will be the existing contacts that are defined in that map, but even cursory examination of these, plus armed with your knowledge of contacts and topography will show you that you will need to substantially modify those existing contacts, based on your interpretation of the above data. This is because this is a generalized map, based on a low-res scale. Furthermore, they didn't have access to any high-quality DEMs in 1968. So it is permissible to start with these contacts, but change them to match the data you have access to.
You will make the map in the GIS program GlobalMapper. Each of you start by copying the file R:\courses\Geo 230-Field Methods 2020\GIS\Circleville.gmw to your folder on the Q drive. This file points to many files on the course folder in this same directory, so you DO NOT need to copy any of those over. Any new files you create can reside on your Q-drive folder. The reason to copy your own Circleville.gmw is that you will likely work on parts of it separately, but then combine it all in some way. If you have basic questions about GlobalMapper, I have made a GM Frequently Asked Questions page, or email me.
When you open this Circleville.gmw using GlobalMapper (you can double click the one on your Q drive if you like, but you might have to tell it to use the GlobalMapper application), you will see lots of files in the workspace on the left. Turn these on and off to get familiar with the data given. Note that there are many files specific to the Circleville area that you are to map, but also included is a more regional view of things in what I am calling the greater Germany Valley area (features with GV in their name).
In the Circleville.gmw I include my interpretations of the contacts of the formations from the outcrops. Yours may differ a little, but have a good reason to make them really different than that. That is, you all worked on what you thought the contacts were from the outcrops, as did I. When you finally go to put lines on a map, you have to tweak where you put them based on your updated understanding as you are making the map. Particularly now that you have a high-res DEM to look at. Without question, these contacts will be in a different place than the WV State Geo map, as discussed above.
GlobalMapper is easy to use, but I will have to show you a few things about how to edit lines. I will do that in class, and have also make a GM FAQ to reinforce the concepts.
Step 1 Structural Attitude Determination