WVGES Interactive Map Tips and Tricks, Middle and Upper Devonian Organic-Rich Shales


The Devonian Organic-Rich Shales Interactive Map is designed to accompany WVGES Reports of Investigation 35, Lithostratigraphy of Middle and Upper Devonian Organic-Rich Shales in West Virginia. The Interactive Map provides the ability for users to zoom in for convenience--to read labels and link to additional data. Zooming in produces maps which are not necessarily accurate at large scales given that maps were drawn based on a state-wide sampling of data. Localized study would be needed to be more certain of the details of any particular area.


Panning: Like with Google Maps, click on the map and while still pressing down on the mouse, move in the direction you want to go. The cursor may change to a cross with arrows to show that you are in panning mode.

Zooming: There are several options for zooming in and out of a map.

Turn Layers Off and On

Within the "Layers" tab area, turn interactive map layers off or on by checking in the square box next to a layer (or folder name). Multiple layers within a folder can be turned on (or off) by clicking on the square box next to the folder (e.g. clicking the box on beside "Isochore Marcellus Fm (Net Shale) (Fig 11a)" will turn on the 4 layers within the folder). A "-" sign will minimize the legend or folder contents whereas a "+" sign will expand to show the legend for a layer or the contents of a folder (including the layers and their legends).

Show Labels

      *1:750,000 equates, very roughly, to zooming in so that approximately 6 counties are visible.

Get Additional Map Feature Data (e.g. additional data about wells)

Click on a feature (i.e. well or cross-section line) to obtain additional information about the feature and to access any links. It may be best to zoom into the area of interest first and then click on a feature--that way, the time it takes to retrieve data will be reduced and results will not be overwhelming. In addition to more detailed data about the feature, wells and cross-sections lines contain links to additional materials. Wells link to the WVGES "pipeline" showing virtually all non-study data that WVGES has in reference to a particular well**. Cross-section lines link to a .pdf of the cross-section from the study. Pop-ups will need to be permitted from www.wvgs.wvnet.edu because the information will "pop up" on the map. To close the pop-up window, click on the triangle in the upper right-hand corner. If you do not obtain layer data as expected, close the pop-up window and then zoom in on the main map to a particular feature and try again.
**Stratigraphic data in "pipeline" will, quite likely, not align with stratigraphic data from the Middle and Upper Devonian lithostratigraphy study. "pipeline" data, largely, is as reported by the operator, from many different operators over many years, whereas data from the study in based on analysis of geophysical well logs taking a comprehensive look at a sampling of wells across the State in a consistent manner.

Access Supplemental Information

Access a stratigraphic chart and the Middle and Upper Devonian lithostratigraphy report by clicking on the "Info" tab to the left of the map and then by clicking on the item of interest.

Adjust Transparency

Set the transparency for a feature-set (i.e. layer). Use the slider bar under the feature-set in the "Layers" section and move the adjuster (a little "home plate" symbol) to reduce or increase the feature-set opacity.

Adjust Panes

To see more of the map and less of the left pane, click on the border between the map and the left pane and drag it to the left to expand the map pane. Do the opposite to see more of the left pane.


In the left panel, click on the "Tools" tab and select "Print." Either click on the "Print" button or on the drop-down arrow to see selections for size and layout of the map, or if you just want the "raw" map only. The map extent that you are viewing will print in a PDF that can be saved.