Bureau of Topographic and Geologic Survey


Marcellus and other Organic-Rich Shale

Research on the Marcellus, Utica and other organic rich shales.

Hickory Run boulder field

What's New

This section features new information and publications on the bureau's website.


Pennsylvania Geologic Web-Mapping Application Now Online!

After many months of work, the Pennsylvania Geological Survey has released its dedicated web-mapping application that allows you to, among other things, explore geologic data and search for publications on your computer screen, download data and publications of interest, or add data directly to ArcMap or Google Earth. The map layers, which can be toggled on or off, include bedrock geology, surficial geology, and other geologic themes of interest, such as earthquake epicenters, physiographic sections, and outstanding geologic sites. The bedrock geology represents data from the 2001 digital bedrock database, which were compiled and updated from the 1980 state geologic map. The surficial geology layers are shown for parts of the northeastern glaciated area of the state. They represent a consolidation of data from the 1:24,000-scale surficial geologic maps published in our OFSM series. The other geologic layers also are based on data previously published by the bureau.

This new web-mapping application should have a familiar feel to our regular visitors, as it builds upon the geology portion of DCNR’s interactive map that was released this past spring. The surficial geology layer and the publication search capability are the most notable additions. The application employs GIS tools to answer geographic inquiries for publications. If you select one to three publication series and define an area on the map, the system will return a list of publications that meet your criteria. The results table includes a resource link for each publication that will open a new browser window containing a short description, a suggested citation, and a link to download a ZIP archive containing the publication files. For a few of the publications, the resource link will take you directly to an online report.

Plan to visit the application often—in the coming months, new data-driven features will be added to the platform. One of the first will be data layers derived from the consolidation of 1:24000-scale bedrock geologic mapping from our OFBM series.