
On Saturday, June 11, the NHGS hosted a family outing at the Christa McAuliffe Planetarium. The guest speaker was Russell Kempton of the New England Meteoritical Services, who spoke on the history of the universe, meteorites, and their "impact" on the geology of the earth. The outing also featured a pizza party in the garden, the Planetarium's new "Pathfinders" show and a meteorite exhibit. Thanks, Russ, for giving us the opportunity to hold pieces of the oldest matter in the universe!
On Saturday, August 6, 1994, over 50 NHGS members, relatives and friends attended the Fourth Annual NHGS Field Trip. Carl Koteff of the USGS was generous in donating a full day out of his busy schedule to lead this group to several excellent exposures of Pleistocene glacial and glaciomarine deposits in New Hampshire and Maine. Approximately 80 miles was covered by a car convoy of twenty automobiles. A near-cloudless day with temperatures in the low 80's helped make this a completely successful day in the field. The trip consisted of five stops (six were planned) where we observed evidence of a late-glacial marine invasion, including examples of glacial marine deltas, and drumlins reworked by the marine environment. The purpose was to show evidence of a stable sea level and a delayed isostatic rebound after glacial retreat in this region approximately 14,000 to 15,000 years before present.
At glaciomarine deltas in Rochester, NH and Wells, ME, Carl showed evidence of a 1,000-year stable sea level by explaining his process to measure delta topset/foreset bed contacts. These measurements recorded marine sea level elevations where topset beds were in contact with foreset beds. Carl's measurements were recorded with an accuracy of +/- 3 feet (1 meter), which provided a baseline for his model. Maintaining a stable sea level seems to require a delay in isostatic rebound after ice retreat.
Carl also explained that with the measurements of these contacts, in addition to carbon age dating, he was able to gather evidence supporting a sudden rise in sea level of approximately 20 to 30 feet (7 to 10 meters) that must have occurred within a period of only 50 to 100 years.
Carl showed us excellent examples of drumlins that were wave-modified by the late-glacial sea. Evidence of marine wave action was shown at two stops, Beach Hill in Madbury, NH and Great Hill in Eliot, ME. At these drumlins, we observed glacial till reworked by wind and current action and the re-deposition of this material along the drumlins. The marine and aeolian action ultimately modified the structures and axes of these drumlins from a northwest-southeast axial trend to a more east-west direction. The extent of the reworking presented further evidence that the sea level must have been constant for an extended period.
NHGS wishes to express its gratitude to the landowners, the University of New Hampshire, the Town of Wells, ME, and the Maine Department of Transportation for allowing access to these stops. Also, we would like to thank Carl, and Tom Weddle of the Maine Geological Survey, for permission to use their October 1993 GSA Field Trip Guide for this field trip. Finally, NHGS thanks those members who helped to make this field trip a memorable success.
[Editor's Note: Special thanks to Greg Kirby for all his effort in putting together the field guide and road log, and for arranging for the boxed lunches!]
NHGS is pleased to announce that Dr. Dykstra Eusden of Bates College, Lewiston, ME, will present "Bedrock Geology of the Presidential Range, New Hampshire." Dyk has recently completed his six-year study of the structure, stratigraphy and metamorphism of the alpine region of the Presidential Range, and has just submitted the map for review and approval with the NH State Geologist, Gene Boudette. NHGS feels honored to have Dyk provide us with new New Hampshire geology hot off the presses. This meeting is also the Annual Meeting of the Society, and members will be electing a new set of officers (the slate of candidates is published in this newsletter) and voting on a change in the Bylaws of the Society (also published in this newsletter). The dinner-meeting will be held on October 13, 1994, at the Sheraton-Tara Inn in Bedford, NH. A cash bar is provided with refreshments beginning at 6:00 p.m. A sit-down dinner will be provided with a choice of two entrees at 7:00 p.m. The cost for members and non-members is $16.00 per person. For more information, contact Greg Kirby at 603-271-3624.
Featured at the Society's Annual Meeting on Thursday, October 13, 1994, will be the election of officers. Presented here is the Slate of Candidates:
The Nominating Committee consisted of Bob Luhrs and Dorothy Richter.
The Board of Directors proposes the following change to the Bylaws of the Society:
Current:
Article IV: Officers
Section B. The officers shall be elected for a term of one year each, one member at large of the Board of Directors for a term of two years and second member for one year, by a majority of members present at the Annual Corporate Meeting.
Proposed:
Article IV: Officers
Section B. The officers shall be elected for a term of one year each. The Members-at-Large of the Board of Directors shall be elected for a term of two years each, with their terms staggered and overlapping such that only one Member-at-Large will be elected each year.
Rationale: This change will ensure continuity in the Board of Directors and the direction of the Society, as each year there will always be at least two members of the Board returning, the Past President and the continuing Member at Large.
Current Situation: Last year, two Members-at-Large were elected: Tim Allen to a two-year term, and John Cotton to a one-year term. Thus one Member-at-Large position is open for election this year.
Implementation: Passage of amendments to the Constitution or changes to the Bylaws require a two-thirds vote of members voting at the Annual meeting. If this change is approved, the Board suggests immediate implementation, such that the Member-at-Large elected at this meeting would be elected for a two-year term.
The NHGS Annual Meeting will be held Thursday, October 13, 1994, at the Sheraton-Tara Inn in Bedford, NH. Dr. Dykstra Eusden of Bates College, Lewiston, ME, will present "Bedrock Geology of the Presidential Range, New Hampshire." Dyk has recently completed his six-year study of the structure, stratigraphy and metamorphism of the alpine region of the Presidential Range, and has just submitted the map for review and approval with the NH State Geologist, Gene Boudette. We are honored to have Dyk provide us with new New Hampshire geology "hot off the presses." This meeting will also feature the election of a new set of officers (the slate of candidates is published in this newsletter) and voting on a change in the Bylaws of the Society (also published in this newsletter). A cash bar will be provided with refreshments beginning at 6:00 p.m. A sit-down dinner with a choice of two entrees will begin at 7:00 p.m. The cost for members and non-members is $16.00 per person. For more information, contact Greg Kirby at 603-271-3624.
Future Meetings are scheduled for January 12, April 13, June 8 (tentative), and October 12, 1995, with a field trip August 5, 1995. For reference, the Society schedules its meetings for the second Thursday of the appropriate month, and its field trip for the first Saturday in August.
The AEG New England Section will be hosting the following meetings:
The NHGS is always looking for speakers and field trip leaders. If interested, please submit a topic and abstract to the Program Committee or a member of the Board.
Last Modified June 15, 1995
The Granite State Geologist, newsletter of the
New Hampshire Geological Society
copyright ©1995 New Hampshire Geological Society
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