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Earthquake recurrence estimates for northern Caribbean faults from combinatorial optimization

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Woods Hole Coastal and Marine Science Center

2023 Annual Report

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Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery

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Hydroacoustic observations reveal drivers of mixing and salinization of a karst subterranean estuary during intense precipitation

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Scientific literature and information products produced by Woods Hole Coastal and Marine Science Center staff

Featured Journal Article

Invasive Phragmites plants on the shore of a lake

Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery

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Featured USGS Series

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Woods Hole Coastal and Marine Science Center—2023 Annual Report.  The 2023 annual report highlights accomplishments, includes a list of publications, and summarizes the work of the center and each of the science groups.

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Sound Waves

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Coastal and Marine Research News from Across the USGS

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Filter Total Items: 1737

Mineral intergrowths replaced by "elbow-twinned" rutile in altered rocks Mineral intergrowths replaced by "elbow-twinned" rutile in altered rocks

Some aggregates of rutile, classically considered to be "elbow" twinned, instead are topotactic replacements of ilmenite or other hexagonal titaniferous precursors. Twinned rutile can be differentiated from the reticulated rutile of topotactic replacements by the angle of prism intersections, junction morphology, and the overall form of the aggregate. In a special case of topotactic...
Authors
E. R. Force, R. P. Richards, K. M. Scott, P. C. Valentine, N.S. Fishman
By
Woods Hole Coastal and Marine Science Center

Seismic velocities for hydrate-bearing sediments using weighted equation Seismic velocities for hydrate-bearing sediments using weighted equation

A weighted equation based on the three-phase time-average and Wood equations is applied to derive a relationship between the compressional wave (P wave) velocity and the amount of hydrates filling the pore space. The proposed theory predicts accurate P wave velocities of marine sediments in the porosity range of 40-80% and provides a practical means of estimating the amount of in situ...
Authors
Myung W. Lee, D. R. Hutchinson, T. S. Collett, William P. Dillon
By
Woods Hole Coastal and Marine Science Center

Seismic reflection profile of the Blake Ridge near sites 994, 995, and 997 Seismic reflection profile of the Blake Ridge near sites 994, 995, and 997

Seismic reflection profiles near Sites 994, 995, and 997 were collected with seismic sources that provide maximum resolution with adequate power to image the zone of gas hydrate stability and the region direction beneath it. The overall structure of the sediment drift deposit that constitutes the Blake Ridge consists of southwestward-dipping strata. These strata are approximately...
Authors
William P. Dillon, Deborah R. Hutchinson, Rebecca M. Drury
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Amplitude blanking in seismic profiles from Lake Baikal Amplitude blanking in seismic profiles from Lake Baikal

Imaging of the deepest sedimentary section in Lake Baikal using multichannel seismic profiling was hampered by amplitude blanking that is regionally extensive, is associated with water depths greater than about 900 m and occurs at sub-bottom depths of 1-2 km in association with the first water-bottom multiple. Application of a powerful multiple suppression technique improved the quality...
Authors
Myung W. Lee, Warren F. Agena, D. R. Hutchinson
By
Woods Hole Coastal and Marine Science Center

Three-dimensional models of deformation near strike-slip faults Three-dimensional models of deformation near strike-slip faults

We use three-dimensional elastic models to help guide the kinematic interpretation of crustal deformation associated with strike-slip faults. Deformation of the brittle upper crust in the vicinity of strike-slip fault systems is modeled with the assumption that upper crustal deformation is driven by the relative plate motion in the upper mantle. The driving motion is represented by...
Authors
Uri S. ten Brink, Rafael Katzman, J. Lin
By
Woods Hole Coastal and Marine Science Center

Gravity field over the Sea of Galilee: Evidence for a composite basin along a transform fault Gravity field over the Sea of Galilee: Evidence for a composite basin along a transform fault

The Sea of Galilee (Lake Kinneret) is located at the northern portion of the Kinneret-Bet Shean basin, in the northern Dead Sea transform. Three hundred kilometers of continuous marine gravity data were collected in the lake and integrated with land gravity data to a distance of more than 20 km around the lake. Analyses of the gravity data resulted in a free-air anomaly map, a variable...
Authors
Z. Ben-Avraham, Uri S. ten Brink, R. Bell, M. Reznikov
By
Woods Hole Coastal and Marine Science Center

Sediment distribution on a storm-dominated insular shelf, Luquillo, Puerto Rico, U.S.A. Sediment distribution on a storm-dominated insular shelf, Luquillo, Puerto Rico, U.S.A.

A sea-floor mapping investigation designed to assess the sediment distribution, the movement of the nearshore sand supply, and the fate of sediment eroded from the shoreline was conducted using high-resolution sidescan-sonar, seismic reflection, and sediment sampling techniques on the northern insular shelf of Puerto Rico, off the town of Luquillo. Sea-floor structures and the...
Authors
W. C. Schwab, R. W. Rodriguez, W.W. Danforth, M. H. Gowen
By
Woods Hole Coastal and Marine Science Center

AMS radiocarbon analyses from Lake Baikal, Siberia: Challenges of dating sediments from a large, oligotrophic lake AMS radiocarbon analyses from Lake Baikal, Siberia: Challenges of dating sediments from a large, oligotrophic lake

A suite of 146 new accelerator-mass spectrometer (AMS) radiocarbon ages provides the first reliable chronology for late Quaternary sediments in Lake Baikal. In this large, highly oligotrophic lake, biogenic and authigenic carbonate are absent, and plant macrofossils are extremely rare. Total organic carbon is therefore the primary material available for dating. Several problems are...
Authors
Steven M. Colman, Glenn A. Jones, M. Rubin, J.W. King, J.A. Peck, W. H. Orem
By
Woods Hole Coastal and Marine Science Center

A precise vertical network: Establishing new orthometric heights with static surveys in Florida tidal marshes A precise vertical network: Establishing new orthometric heights with static surveys in Florida tidal marshes

Elevation differences on the order of 10 cm within Florida's marsh system influence major variations in tidal flooding and in the associated plant communities. This low elevation gradient combined with sea level fluctuation of 5-to-10 cm over decadel and longer periods can generate significant alteration and erosion of marsh habitats along the Gulf Coast. Knowledge of precise and...
Authors
E. A. Raabe, R. P. Stumpf, N.J. Marth, R.L. Shrestha
By
Woods Hole Coastal and Marine Science Center

Structural outer rim of Chesapeake Bay impact crater: Seismic and bore hole evidence Structural outer rim of Chesapeake Bay impact crater: Seismic and bore hole evidence

Nine seismic-reflection profiles and four continuous core holes define the gross structural and stratigraphic framework of the outer rim of the Chesapeake Bay impact crater. The rim is manifested as a 90 km diameter ring of terraced normal-fault blocks, which forms a ∼320 m–1200 m high rim escarpment. The top of the rim escarpment is covered by a 20 m–30 m thick ejecta blanket. The...
Authors
C. W. Poag
By
Chesapeake Bay Activities, Woods Hole Coastal and Marine Science Center

An 84-kyr paleomagnetic record from the sediments of Lake Baikal, Siberia An 84-kyr paleomagnetic record from the sediments of Lake Baikal, Siberia

We have conducted a paleomagnetic study of sediment cores obtained from the Selenga prodelta region of Lake Baikal, Russia. This record, which spans approximately the last 84 kyr, contributes to a better understanding of the nature of geomagnetic field behavior in Siberia and is a useful correlation and dating tool. We demonstrate that the Lake Baikal sediments are recording variations...
Authors
J.A. Peck, J.W. King, Steven M. Colman, V.A. Kravchinsky
By
Woods Hole Coastal and Marine Science Center

Sedimentary processes in the salt deformation province of the Texas-Louisiana continental slope Sedimentary processes in the salt deformation province of the Texas-Louisiana continental slope

No abstract available.
Authors
David C. Twichell, Catherine M. Delorey
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center
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