Publications
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Impacts of exploratory drilling for oil and gas on the benthic environment of Georges Bank Impacts of exploratory drilling for oil and gas on the benthic environment of Georges Bank
A 3-year monitoring program was performed to assess the impacts of exploratory drilling for oil and gas on the benthic environment of Georges Bank, an important commercial fishery region in the North Atlantic east of Massachusetts, USA. Surficial sediments were sampled for chemical and benthic infaunal analysis and bottom still photographs were taken to document bottom microtopography...
Authors
J. M. Neff, Michael H. Bothner, N. J. Maciolek, J. F. Grassle
Holocene sand shoals offshore of the Mississippi River delta plain Holocene sand shoals offshore of the Mississippi River delta plain
Offshore of the Mississippi River delta plain lies a series of Holocene sand shoals marking the position of ancient submerged shorelines associated with younger shelf-phase delta plains. These submerged shorelines represent positions when sea level stood lower than present. Short periods of rapid sea level rise during the Holocene transgression, in combination with subsidence, led to the
Authors
Shea Penland, John R. Suter, Randolph A. McBride, S. Jeffress Williams, Jack L. Kindinger, Ron Boyd
The competition between thermal contraction and differentiation in the stress history of the Moon The competition between thermal contraction and differentiation in the stress history of the Moon
The scarcity of both extension and compression features on the Moon strongly constrains the history of the lunar radius—to variations of less than ±1 km over the past 3.8 Gyr. This limit has traditionally been interpreted as requiring a delicate balance between thermal contraction of the near‐surface and expansion of a substantial cold interior region. Recent theories of lunar origin (e...
Authors
Randolph L. Kirk, David J. Stevenson
Morphology of sea-floor landslides on Horizon Guyot: application of steady-state geotechnical analysis Morphology of sea-floor landslides on Horizon Guyot: application of steady-state geotechnical analysis
Mass movement and erosion have been identified on the pelagic sediment cap of Horizon Guyot, a seamount in the Mid-Pacific Mountains. Trends in the size, shape and preservation of bedforms and sediment textural trends on the pelagic cap indicate that bottom-current-generated sediment transport direction is upslope. Slumping of the sediment cap occurred on and that the net bedload...
Authors
R. E. Kayen, W. C. Schwab, H.J. Lee, M.E. Torresan, J.R. Hein, P. J. Quinterno, L.A. Levin
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, August 1989 Preliminary geomagnetic data, College Observatory, Fairbanks, August 1989
No abstract available.
Authors
J.B. Townshend, R. V. O’Connell, C.A. Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, Carol Ann Varner
Report on list of structures recommended for seismic instrumentation in the Puget Sound area, Washington Report on list of structures recommended for seismic instrumentation in the Puget Sound area, Washington
No abstract available.
Authors
B. M. Olsen, P. Grant, Mehmet Çelebi
A direct method for calculating instrument noise levels in side-by-side seismometer evaluations A direct method for calculating instrument noise levels in side-by-side seismometer evaluations
The subject of determining the inherent system noise levels present in modem broadband closed loop seismic sensors has been an evolving topic ever since closed loop systems became available. Closed loop systems are unique in that the system noise can not be determined via a blocked mass test as in older conventional open loop seismic sensors. Instead, most investigators have resorted to...
Authors
L. Gary Holcomb