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. Meetings are at GTS Technologies, 441 Friendship Rd, Harrisburg, PA 17111. They occur at 6:30 PM on the second Thursday of the month, except summer months.
President- Kent Littlefield- KENT.V.LITTLEFIELD@leidos.com
Vice-president- Bill Bruck- firstname.lastname@example.org
Treasurer- Jeb Baxter- email@example.com
Secretary- Amy Randolph- firstname.lastname@example.org
Up coming events : February 8, 6:30 PM – Dr. Timothy Bechtel, P.G. F&M College –2-8-18 HAGS mtg Bechtel Boiling Springs
Use of Satellite-Derived Precipitation Data in the Identification of Spring Recharge Areas
and its Relationship to Boiling Springs, Cumberland County, PA
Abstract: Research conducted by Dr. Timothy Bechtel; Associate Professor of Geoscience, Robert Walter; F&M student researcher, Jake Longenecker; and others, resulted in a paper published in “Geophysical Research Letters” in May 2017 (http://onlinelibrary.wiley.com/doi/10.1002/2017GL073790/epdf) which outlines a method to determine the recharge area for springs using NASA satellite-derived precipitation data which uses microwaves to measure global precipitation over 100 square kilometer parcels every half hour. The utility of this method can be applied worldwide to identify spring recharge areas and their hydrodynamics and assist in watershed protection.
Of specific interest in the research was the study of Boiling Spring (locally known as “the Bubble”) in Cumberland County, PA, where a correlation was seen between rainfall along the Pennsylvania-Maryland border – nearly 50 miles away from the karst spring – and a rise in the water level at the spring (i.e., a discharge surge).
Speaker Bio: Dr. Timothy Bechtel is a graduate of Haverford College (B.Sc., Geology) and Brown University (M.Sc. Engineering Geology and Ph.D. Geophysics). He is a founding principal (with his wife Felicia) of Enviroscan, Inc., a geophysical contracting firm located in Lancaster, PA. He is an adjunct assistant professor of geoscience at Franklin & Marshall College in Lancaster, PA where he has taught geophysics, karst hydrogeology, engineering geology, petroleum geology and other topics. Dr. Bechtel is the recipient of numerous awards and grants, and has a long list of publications. Other research interests include landmine and unexploded ordinance detection and discrimination, archeological geophysics, non-destructive testing of artworks and historic architecture and land instability, such as subsidences, landslides and rock falls.
March 8, 2018 – Jonathan Relyea, P.G., Project Geologist, American Engineers Group (AEG) – State Route 11/15 Rock Slope Safety Improvement Projects, Duncannon and Marysville, PA
April 12, 2018 – Mark W. Eisner, P.G., President – Advanced Land and Water, Inc. (Maryland) – Nitrates in Rural Groundwater Supply Wells not from Farming: An Unexpected Finding Based on Forensic Hydrogeology
May 10, 2018 –(tentative) Dr. Jorge A. Santiago-Blay, Department of Paleobiology with the Smithsonian Institute, research into amber.
HAGS Guidebooks, available for purchase, $5 each, plus $2 S7H. Multiple books may have discounted shipping.
1st Annual Field Trip‐Geology 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. $5.00 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. $5.00 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. $5.00 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, $5.00 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, $5.00 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., $5.00 plus $2.00 S&H.
21st Field Trip‐ Shermans Creek from Dellville to Duncannon, Perry County, Pennsylvania, William Roman, May 12, 2012, 48 pages, color, $5.00 plus $2.00 S&H.
22nd Field Trip‐ Some geological aspects of the north side of the Cumebrland Valley in Cumberland County, PA, Bill Sevon, May 4, 2013, 33 pages, large font, color photos, $5.00 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.