The purpose of the Harrisburg Area Geological Society (HAGS) is to stimulate geologic thought, advance and disseminate geologic knowledge, and provide fellowship amongst area individuals interested in earth sciences. Monthly meetings (at GTS Technologies at 441 Friendship Road in Harrisburg) present a realm of geologic topics, ranging from tectonics, coal, carbonate groundwater geochemistry, Martian geomorphology, engineering geophysics, nuclear waste repositories, and ore mineralogy. Field trips allowed members to visit geologic sites within and beyond Pennsylvania. All events are open to the public and free unless otherwise stated.

Up coming events :10-15-15 HAGS AEC mtg Allard Smith Lehigh Valley Radon

 A Geologic “Perfect Storm” of Very High Radon in the Center Valley/Coopersburg area of Lehigh County, PA

Presented by: David Allard, PA DEP Bureau of Radiation Protection


Robert Smith, retired – PA Geological Survey

Abstract: In September 2014, a radon mitigation contractor informed DEP of high radon readings located in a newer housing development in an area of Lehigh County just south of the Reading Prong. Subsequent testing revealed readings up to 3700 pCi/L – a new state (and perhaps US) record. [The EPA recommends mitigation for readings >4 pCi/L.]

This presentation will generally cover radon in PA, as well as detail the outreach, testing efforts and findings for this residential area. It will also include a summary of the area’s relationship to the Reading Prong, and mineralogy, geochemistry, & radionuclide distribution in the soil profile, as well as relationships to out-of-state uranium occurrences.

Speaker Bios: Mr. Allard is the Bureau Director of PA DEP’s Bureau of Radiation Protection and the Governor’s official liason to the US Nuclear Regulatory Commission. He has worked as a consultant to the US Department of Energy, and has been involved in various aspects of governmental, industrial, reactor, medical and academic radiation protection for over 35 years.

Mr. Smith is retired from the PA Geological Survey. He currently assists the Bureau of Radiation Protection with radon and radium.

November 12, Felecia Bechtel, Enviroscan, Hey, This Geophysics #$@&% Really Works!

December, TBD Holiday Party

January 14, 2016 – Jeri Jones, Jones Geologic – Geology Along the York Rail Trail

February 11, 2016 – Al Guiseppe, SSM – PA’s Unconventional Springs

March 10, 2016 – Seth Pelepko, DEP – shale gas stuff

April 14, 2016 – Charles Cravotta, USGS – Hydrological, Geochemical, and Geophysical Investigations in Support of Watershed Restoration in the Upper Schuylkill River

May 12, 2016 – Ted Daeschler, Academy of Natural Sciences and Drexel University – New Discoveries from the Age of Fishes in PA and Beyond


*Spring 2016 speakers, dates and topics are subject to change.


President- Kent Littlefield-

Vice-president- Bill Bruck-

Treasurer- Jeb Baxter-

Secretary- Amy Randolph-


HAGS Guidebooks, available for purchase

1st Annual Field TripGeology in the South Mountain area, Pennsylvania, Noel Potter, Jr., editor, April 24, 1982, Reprinted 1992. 37 p. $5.00 plus $2.00 S&H.

2nd Annual Field Trip‐ Geology along the Susquehanna River, south‐central Pennsylvania, J. Ronald Mowery, editor, April 16, 1983, 55 p. $5.00 plus $2.00 S8H.

3rd Annual Field Trip‐ Stratigraphy, structural style, and economic geology of the York‐Hanover Valley, G. Robert Ganis and David Hopkins, April 28,1984, 51 p. $5.00 plus $2.00 S&H.

4th Annual Field Trip‐ Pennsylvania’s polygenetic landscape, William D. Sevon, April 27, 1985, Reprinted 1992, 55 p. $5.00 plus $2.00 S&H.

5th Annual Field Trip‐ Selected geology of Dauphin and Northumberland Counties, Pennsylvania, by W. D. Sevon, W. E. Edmunds, G. R. Ganis, and J. P. Wilshusen, May 17, 1986, 22 p. $5.00 plus $2.00 S&H.

6th Annual Field Trip‐ Lower Jurassic diabase and the Battle of Gettysburg, D. T. Hoff, J. R. Mowery, and G. R. Ganis, April 25, 1987,17 p. plus appendices. $5.00 plus $2.00 S&H.

7th Annual Field Trip‐ The geology of the Lower Susquehanna River area, a new look at some old answers, Glenn H. Thompson, Jr., editor, May 7,1988, 56 p. $5.00 plus $2.00 S&H.

8th Annual Field Trip‐ Karst development and environmental geology in the carbonate rocks of the Lehigh and Lebanon Valleys, William E. Kochanov, April 29, 1989, 33 p. $5.00 plus $2.00 S&H.

In cooperation with the 20th annual Binghamton Geomorphology Symposium at Dickinson College‐The rivers and valleys of Pennsylvania, then and now, by William D. Sevon, October 20, 1989, 59 p. $5.00 plus $2.00 S&H.

10th Annual Field Trip‐ The Ridge and Valley Physiographic Province and the East Broad Top Railroad, William D. Sevon, June 1, 1991, 24 p. $5.00 plus $2.00 S&H.

11th Annual Field Trip‐ Paleozoic geology of the Paw Paw‐Hancock area of Maryland and West Virginia, Marcus M. Key and Noel Potter, Jr., May 9,1992, 25 p. $5.00 plus $2.00 S&H.

12th Annual Field Trip‐ South Mountain and the Triassic in Adams County, Pennsylvania, Raymond Britcher, editor, May 22, 1993, 41 p. $5.00 plus $2.00 S&H.

13th Annual Field Trip‐ Geology of the Lebanon Valley and western end of the Reading Prong, Charles Scharnberger, editor, April 23. 1994, 68 p. $7.00 plus $2.00 S&H.

15th Annual Field Trip‐ Pseudo‐Morainic Topography of the Allentown Area of Eastern Pennsylvania, Duane D. Braun and William E. Kochanov, May 4, 1996, 28 p. $7.00 plus $2.00 S&H.

16th Annual Field Trip‐ Notes on the Hamburg Klippe: biostratigraphy, ash layers, olistostromes, and “exotics,” G. Robert Ganis, April 26, 1997, 52 p. $15.00 plus $2.00 S&H

17th Annual Field Trip‐ Geomorphology in the Northern Cumberland Valley, PA, including the Carlisle Deluge of 1779, Noel Potter, Jr., Donald Hartman, and Helen Delano, April 18, 1998, 49 p, $7.00 plus $2.00 S&H.

18th Annual Field Trip‐ The Cove Syncline by canoe, William M. Roman and Michael A. Knight, May 15, 1999, 16 p. plus maps, Out of Print

19th Annual Field Trip‐ Geology of the Kishacoquillas Valley and vicinity, Mifflin County, Pennsylvania, Michael A. Knight and William M. Roman, May 20, 2000, 18 p. plus maps and sections, $7.00 plus $2.00 S&H.

20th Field Trip‐ Geology and Geomorphology of the South Mountain Area, Cumberland and Franklin Counties, Pennsylvania, Noel Potter, Jr., and William D. Sevon, May 14, 2011, 64 p., $10.00 plus $2.00 S&H.

No formal guidebooks were prepared for the 9th (1990) and 14th (1995) Field Trips. The 2001 trip was a repeat of the 2000 trip.