PGS: Marcellus Shale

The January meeting of the Potomac Geophysical Society will be held January 19th at the Fort Myer Officers’ Club in Arlington, VA ( in the Glassed-in room in the Fife and Drum (main dining room).

This month’s talk will be: “Geology of the Marcellus Shale – Valley and Ridge, Virginia and West Virginia,” by Cathy Enomoto.

Abstract:  Exposures of the middle Devonian Marcellus Shale in the Broadtop Synclinorium, located in Virginia, West Virginia, and southern Pennsylvania, have been utilized by the USGS for studies of the lithology, mineralogy, thermal stress, and organic carbon richness of this high-profile shale gas play.  Data from the Valley and Ridge locations will be examined in the context of the USGS revised assessment of undiscovered oil and gas resources of the Marcellus Shale in the Appalachian Basin published in August, 2011.  For those of you who were unable to attend the 2-day field trip organized in affiliation with the American Association of Petroleum Geologists Eastern Section meeting held in September, 2011, in Crystal City, Arlington, VA, many photographs of the Marcellus Shale outcrops in Virginia and West Virginia will be shown.

Bio.:  Cathy Enomoto is a research scientist with the Eastern Energy Resources Science Center of the U.S. Geological Survey in Reston, VA.  Before joining the USGS, Cathy worked as a geologist for the Virginia Division of Geology and Mineral Resources, which is the Virginia geological survey, in Charlottesville, VA.  And previous to that, Cathy utilized geological and geophysical data to explore for oil and gas in the petroleum industry in New Orleans, Louisiana, and Houston, Texas.  Most of her career in private industry was spent with Texaco Inc.

Cathy is a member of the American Association of Petroleum Geologists, the Society of Exploration Geophysicists, and the Geological Society of Washington.

New Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this for the first time in September, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day ( Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at for new meeting announcements, etc. Please send changes of address or email to


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