An Obstructed Cave Passage in the Cobleskill Plateau: A Gravimetric Study

M. Weremeichik Jeremy; M. Weremeichik Jeremy

doi:10.3934/geosci.2015.1.80

AIMS Geosciences

2015, Volume 1, Issue 1: 80-98. doi: 10.3934/geosci.2015.1.80

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An Obstructed Cave Passage in the Cobleskill Plateau: A Gravimetric Study

M. Weremeichik Jeremy ^,

Department of Geosciences, Mississippi State University, MS, 39762-5448, USA

Received: 16 November 2015 Accepted: 18 December 2015 Published: 24 December 2015

The Cobleskill Plateau of central New York, part of the greater Helderberg Plateau, is comprised of Silurian and Devonian limestone. This area displays caves and karst landforms subsequently altered by glaciation. The glacially mantled and in-filled pre-existing karst topography of the area was caused by hydrologic changes that determined current karst flow paths. Determining the nature of the antecedent topography, and the location of cave passages, is critical to a complete hydrologic analysis of the Cobleskill Plateau. Two gravity traverses were conducted along traverses near Cobleskill, New York using a Worden Gravity Meter with the intent to validate the subsurface location of an occluded abandoned trunk passage connecting Howe Caverns and McFails Cave. To clarify, the term ‘abandoned’ is meant as an identifier that the passage is no longer utilized as the primary flow path and is only utilized by flowing water during periods of moderate to high discharge. The importance of the existence or absence of the abandoned trunk passage is to increase the understanding of subsurface geology, potential hazards, and controls on pre-glacial groundwater flow in the region. The findings of this study conclude that subsurface anomaly sources do exist at anticipated locations which were believed to contain the passage in question. The study demonstrates that it is possible to identify this passage through the use of gravity surveys. However, the exact shape and size of the anomaly cannot be definitively determined by this study, as the true depth to bedrock could not be determined. Though it is possible to roughly estimate passage dimensions based on a knowledge of the traversable, upstream and downstream passages. The data collected in this study can be fit to various models which can be interpreted to support the existence of a void beneath the two traverses. Further exploration of the subsurface karst systems in the region is needed to determine the exact nature of the anomaly sources.
- obstructed cave passage,
- Cobleskill Plateau,
- McFails Cave,
- Howe Caverns,
- karst,
- caves,
- gravimetry,
- geophysics
Citation: M. Weremeichik Jeremy. An Obstructed Cave Passage in the Cobleskill Plateau: A Gravimetric Study[J]. AIMS Geosciences, 2015, 1(1): 80-98. doi: 10.3934/geosci.2015.1.80

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Abstract

The Cobleskill Plateau of central New York, part of the greater Helderberg Plateau, is comprised of Silurian and Devonian limestone. This area displays caves and karst landforms subsequently altered by glaciation. The glacially mantled and in-filled pre-existing karst topography of the area was caused by hydrologic changes that determined current karst flow paths. Determining the nature of the antecedent topography, and the location of cave passages, is critical to a complete hydrologic analysis of the Cobleskill Plateau. Two gravity traverses were conducted along traverses near Cobleskill, New York using a Worden Gravity Meter with the intent to validate the subsurface location of an occluded abandoned trunk passage connecting Howe Caverns and McFails Cave. To clarify, the term ‘abandoned’ is meant as an identifier that the passage is no longer utilized as the primary flow path and is only utilized by flowing water during periods of moderate to high discharge. The importance of the existence or absence of the abandoned trunk passage is to increase the understanding of subsurface geology, potential hazards, and controls on pre-glacial groundwater flow in the region. The findings of this study conclude that subsurface anomaly sources do exist at anticipated locations which were believed to contain the passage in question. The study demonstrates that it is possible to identify this passage through the use of gravity surveys. However, the exact shape and size of the anomaly cannot be definitively determined by this study, as the true depth to bedrock could not be determined. Though it is possible to roughly estimate passage dimensions based on a knowledge of the traversable, upstream and downstream passages. The data collected in this study can be fit to various models which can be interpreted to support the existence of a void beneath the two traverses. Further exploration of the subsurface karst systems in the region is needed to determine the exact nature of the anomaly sources.

References

[1]	Kastning EH (1975) Cavern development in the Helderberg Plateau, east-central New York. University of Connecticut..reprinted as New York Cave Survey Bulletin 1: 194.
[2]	Palmer MV (1976) Groundwater flow patterns in limestone solution conduits.State University of New York at Oneonta 150.
[3]	Mylroie JE (1977) Speleogenesis and karst geomorphology of the Helderberg Plateau, Schoharie County, New York. Rensselaer Polytechnic Institute.reprinted as New York Cave Survey Bulletin 2: 336.
[4]	Dumont KA (1995) Karst hydrology and geomorphology of the Barrack Zourie Cave System, Schoharie County, New York. Mississippi State University.reprinted as New York Cave Survey Bulletin 5: 70.
[5]	Weremeichik JM, Mylroie JE (2014) Glacial Lake Schoharie: An investigative study of glaciolacustrine lithofacies in caves, Helderberg Plateau, central New York.J Cave Karst Stud 76: 127-138.
[6]	Cooper MP, Mylroie JE (2015) Glaciation and Speleogenesis: Interpretations from the Northeastern United States.Springer .
[7]	Palmer AN, Rubin PA, Palmer MV, et al. (2003) Karst of the Schoharie Valley and land use analysis, Schoharie County, New York State. In: Johnson EL, editor.New York State Geological Association Field Trip Guidebook 75th Annual Meeting 141-165.
[8]	Lauritzen S-E, Mylroie JE (2000) Results of a speleothem U/Th dating reconnaissance from the Helderberg Plateau, New York.J Cave Karst Stud 62: 20-26.
[9]	Rubin PA (2009) Geological evolution of the Cobleskill Plateau; New York State, USA. In.Proceedings of the 15^th International Congress of Speleology 972-978.
[10]	Egemeier SJ (1969) Origin of caves in eastern New York as related to unconfined groundwater flow.Natl Speleol Soc Bull 37: 97-110.
[11]	Palmer AN, Palmer MV, Porter CO, et al. (1991) A geologic guide to the karst and caves of the Helderberg Mountains, Schoharie and Albany Counties, New York. In: Nardacci M, editor. Guide to the Caves and Karst of the Northeast: 50^th Anniversary NSS Convention; Cobleskill, NY.National Speleological Society 105-167.
[12]	Palmer AN, Rubin PA (2007) Karst of the Silurian-Devonian Carbonates in Eastern New York State, with emphasis on the Cobleskill Plateau. In.Carbonate Geology of the Howes Cave Area, Schoharie County, New York, Hudson-Mohawk Professional Geologists Association Field Trip Guidebook 17-35.
[13]	Flora DF, Ferwerda JA, Ackerson KT, et al. (1969) Soil survey of Schoharie County, New York.Soil Surv Reports United States Dep Agric 153.
[14]	Web Soil SurveyNational Cooperative Soil Survey. U.S. Department of Agriculture.Available from .
[15]	Bugliosi EF, Trudell R.A, Casey GD (1988) Potential yields of wells in unconsolidated aquifers in upstate New York - Hudson-Mohawk sheet. U.S..Geological Survey Water-Resources Investigations Report 87-4275.
[16]	Parasnis DS (1979) Principles of applied geophysics.Chapman and Hall .
[17]	Torge W (1989) Gravimetry.De Gruyter .
[18]	Whitelaw JL, Mickus K, Whitelaw MJ, et al. (2008) High-resolution gravity study of the Gray Fossil Site.Geophysics 73: B25-B32.
[19]	Crawford NC, Lewis MA, Winter SA, et al. (1999) Microgravity techniques for subsurface investigations of sinkhole collapses and for detection of groundwater flow paths through karst aquifers. In: Beck BF, Pettit AJ, Herring JG, editors.Hydrology and Engineering Geology of Sinkholes and Karst 203-218.
[20]	Crawford NC, Webster JW, Winter SA (1989) Detection of caves from the surface by microgravity followed by exploratory drilling: Lost River Groundwater Basin, Bowling Green, Kentucky.Prepared for the City of Bowling Green, Municipal Order No 85-83.
[21]	Milunich K, Palmer AN (1996) Gravity survey of a buried pre-glacial valley in east-central New York and interpretation of glacial effects on karst drainage.The Compass 74: 7-13.
[22]	Hammer S (1939) Terrain corrections for gravimeter stations.Geophysics 4: 184-194.
[23]	Leaman DE (1998) The gravity terrain correction - practical considerations.Explor Geophys 29: 467-471.
[24]	Palmer AN (1991) Map of McFails Cave, Schoharie County, New York. In: Nardacci M, editor. Guide to the Caves and Karst of the Northeast: 50^th Anniversary NSS Convention, Cobleskill, New York.National Speleological Society 167.
[25]	US GS (1994) Cobleskill quadrangle, New York-Schoharie Co.: 7.5 Minute Series (Topographic).scale .
[26]	Rickard LV (1962) Late Cayugan (Upper Silurian) and Helderbergian (Lower Devonian) stratigraphy in New York.New York State Museum and Science Service Bull 386: 157.
[27]	Ebert JR, Matteson DK, Natel EM (2001) Parting the Helderberg Sea: cryptic unconformities and the Silurian-Devonian boundary in the classic epeiric sea sequence of New York. In.Geologic Society of America, Abstracts and Programs 321-322.
[28]	Ebert JR, Matteson DK, Wilson R (2010) Sedimentologic observation and stratigraphic interpretation of the Lower Devonian (Lochkovian) Manlius Formation along the Mohawk River Valley in Upstate New York: A discussion.J Geol 118: 333-337.
[29]	Ver Straeten CA (2008) Volcanic tephra bed formation and condensation processes: A review and examination from Devonian stratigraphic sequences.J Geol 116: 545-557.
[30]	Ver Straeten CA (2009) The classic Devonian of the Catskill Front: A foreland basin record of Acadian orogenesis. In.New York State Geological Association Field Trip Guidebook 81st Annual Meeting 7-1-7-54.

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