Mary McGann (Former Employee)
Science and Products
Filter Total Items: 15
Invertebrate remains from the Dominican University of California archaeological site MRN-CA-254, Marin County, California Invertebrate remains from the Dominican University of California archaeological site MRN-CA-254, Marin County, California
This data release indicates faunal presence or absence of shelly artifacts (invertebrate remains) from the Dominican University of California archaeological site MRN-CA-254, Marin County, California.
Sediment core data from the northern flank of Monterey Canyon, offshore California Sediment core data from the northern flank of Monterey Canyon, offshore California
The five files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, north of Monterey Canyon, offshore central California. Vibracores and push cores were collected with the Monterey Bay Aquarium Research Institutes remotely operated vehicle (ROV) Doc Ricketts in 2014 (cruise ID 2014-615-FA). One spreadsheet
Sediment core data from offshore Palos Verdes, California Sediment core data from offshore Palos Verdes, California
The seven files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, offshore Los Angeles and the Palos Verdes Peninsula, adjacent to the Palos Verdes Fault. Gravity cores were collected by the USGS in 2009 (cruise ID S-I2-09-SC; http://cmgds.marine.usgs.gov/fan_info.php?fan=SI209SC), and vibracores were collected...
Filter Total Items: 75
Impact of climate change on mollusks and other invertebrate resources at the Dominican University of California archaeological site (CA-MRN-254), Marin County, California Impact of climate change on mollusks and other invertebrate resources at the Dominican University of California archaeological site (CA-MRN-254), Marin County, California
We have identified and provided ecological interpretations of 30 taxa recovered at two shellmounds at the Dominican University of California archaeology site in Marin County, California (CA-MRN-254). A Q-mode cluster analysis was used to group the samples according to their faunal similarity. The clusters ranged from a diverse grouping of 100 samples with 27 taxa (Cluster A) to those...
Authors
Mary McGann, Charles Powell
Marine paleoseismic evidence for seismic and aseismic slip along the Hayward-Rodgers Creek fault system in northern San Pablo Bay Marine paleoseismic evidence for seismic and aseismic slip along the Hayward-Rodgers Creek fault system in northern San Pablo Bay
Distinguishing between seismic and aseismic fault slip in the geologic record is difficult, yet fundamental to estimating the seismic potential of faults and the likelihood of multi-fault ruptures. We integrated chirp sub-bottom imaging with targeted cross-fault coring and core analyses of sedimentary proxy data to characterize vertical deformation and slip behavior within an extensional...
Authors
Janet Watt, Mary McGann, Renee Takesue, Thomas Lorenson
Potential use of the benthic foraminifers Bulimina denudata and Eggerelloides advenus in marine sediment toxicity testing Potential use of the benthic foraminifers Bulimina denudata and Eggerelloides advenus in marine sediment toxicity testing
The benthic foraminifers Bulimina denudata and Eggerelloides advenus are commonly abundant in offshore regions in the Pacific Ocean, especially in waste-discharge sites. The relationship between their abundance and standard macrofaunal sediment toxicity tests (amphipod survival and sea urchin fertilization) as well as sediment chemistry analyte measurements were determined for sediments...
Authors
Mary McGann
Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers
Turbidity currents dominate sediment transfer into the deep ocean, and can damage critical seabed infrastructure. It is commonly inferred that powerful turbidity currents are triggered by major external events, such as storms, river floods, or earthquakes. However, basic models for turbidity current triggering remain poorly tested, with few studies accurately recording precise flow...
Authors
Lewis Bailey, Michael Clare, Kurt Rosenberger, Matthieu Cartigny, Peter Talling, Charles Paull, Roberto Gwiazda, Daniel Parsons, Stephen Simmons, Jingping Xu, Ivan Haigh, Katherine Maier, Mary McGann, Eve Lundsten
Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada) Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada)
Fluid seepage along obliquely deforming plate boundaries can be an important indicator of crustal permeability and influence on fault-zone mechanics and hydrocarbon migration. The ~850-km-long Queen Charlotte fault (QCF) is the dominant structure along the right-lateral transform boundary that separates the Pacific and North American tectonic plates offshore southeastern Alaska (USA) and...
Authors
Nancy Prouty, Daniel Brothers, Jared Kluesner, J. Vaughn Barrie, Brian Andrews, Rachel Lauer, Gary Greene, James Conrad, Thomas Lorenson, Michael Law, Diana Sahy, Kim Conway, Mary McGann, Peter Dartnell
What determines the downstream evolution of turbidity currents? What determines the downstream evolution of turbidity currents?
Seabed sediment flows called turbidity currents form some of the largest sediment accumulations, deepest canyons and longest channel systems on Earth. Only rivers transport comparable sediment volumes over such large areas; but there are far fewer measurements from turbidity currents, ensuring they are much more poorly understood. Turbidity currents differ fundamentally from rivers, as...
Authors
Catharina Heerema, Peter Talling, Matthieu Cartigny, Charles Paull, Lewis Bailey, Stephen Simmons, Daniel Parsons, Michael Clare, Roberto Gwiazda, Eve Lundsten, Krystle Anderson, Katherine Maier, Jingping Xu, Esther J. Sumner, Kurt Rosenberger, Jenny Gales, Mary McGann, Lionel Carter, Ed Pope
Shallow-water foraminifera and other microscopic biota of Clipperton Island, tropical eastern Pacific Shallow-water foraminifera and other microscopic biota of Clipperton Island, tropical eastern Pacific
The recent foraminiferal fauna and associated microbiota of Clipperton Island (10.2833°N, 109.2167°W) were investigated at 20 sites collected in the intertidal zone around the perimeter of the island and from the edge of the inner brackish-water lagoon. Due to the island’s geographic location in a low productivity zone, a lack of variable habitats on and surrounding the island, and heavy...
Authors
Mary McGann, Robert Schmieder, Louis-Philippe Loncke
A ship's ballasting history as an indicator of foraminiferal invasion potential--An example from Prince William Sound, Alaska, USA A ship's ballasting history as an indicator of foraminiferal invasion potential--An example from Prince William Sound, Alaska, USA
We investigated the potential role of ballast sediment from coastal and transoceanic oil tankers arriving and de-ballasting in Port Valdez as a vector for the introduction of invasive benthic foraminifera in Prince William Sound, Alaska. Forty-one ballast sediment samples were obtained in 1998-1999 from 11 oil tankers that routinely discharged their ballast in Prince William Sound after...
Authors
Mary McGann, Gregory Ruiz, Anson Hines, George Smith
Sediment and organic carbon transport and deposition driven by internal tides along Monterey Canyon, offshore California Sediment and organic carbon transport and deposition driven by internal tides along Monterey Canyon, offshore California
Submarine canyons provide globally important conduits for sediment and organic carbon transport into the deep-sea. Using a novel dataset from Monterey Canyon, offshore central California, that includes an extensive array of water column sampling devices, we address how fine-grained sediment and organic carbon are transported, mixed, fractionated, and buried along a submarine canyon...
Authors
Katherine Maier, Kurt Rosenberger, Charles Paull, Roberto Gwiazda, Jenny Gales, Thomas Lorenson, James P. Barry, Peter Talling, Mary McGann, Jingping Xu, Eve Lundsten, Krystle Anderson, Steven Litvin, Daniel Parsons, Michael Clare, Stephen Simmons, Esther J. Sumner, Matthieu Cartigny
Linking direct measurements of turbidity currents to submarine canyon-floor deposits Linking direct measurements of turbidity currents to submarine canyon-floor deposits
Submarine canyons are conduits for episodic and powerful sediment density flows (commonly called turbidity currents) that move globally significant amounts of terrestrial sediment and organic carbon into the deep sea, forming some of the largest sedimentary deposits on Earth. The only record available for most turbidity currents is the deposit they leave behind. Therefore, to understand...
Authors
Katherine Maier, Jenny Gales, Charles Paull, Kurt Rosenberger, Peter Talling, Stephen Simmons, Roberto Gwiazda, Mary McGann, Matthieu Cartigny, Eve Lundsten, Krystle Anderson, Michael Clare, Jingping Xu, Daniel Parsons, James P. Barry, Monica Wolfson-Schwher, Nora Nieminski, Esther J. Sumner
Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California
Multi-beam mapping of the Santa Monica Basin in the eastern Pacific has revealed the existence of a number of elevated bathymetric features, or mounds, harboring cold seep communities. During 2013-2014, mounds at ~600 m water depth were observed for the first time and sampled by Monterey Bay Aquarium Research Institute’s ROV Doc Ricketts. Active cold seeps were found, but surprisingly...
Authors
Magdalena Georgieva, Charles Paull, Crispin Little, Mary McGann, Diana Sahy, Daniel Condon, Lonny Lundsten, Jack Pewsey, David W Caress, Robert Vrijenhoek
Initial dispersal (1986-1987) of the invasive foraminifera Trochammina hadai Uchio in San Francisco Bay, California, USA Initial dispersal (1986-1987) of the invasive foraminifera Trochammina hadai Uchio in San Francisco Bay, California, USA
A time series of three closely-spaced data sets are used to track the early expansion of the invasive Japanese benthic foraminifera Trochammina hadai in the southern portion of San Francisco Bay known as South Bay. The species initially appeared in 1983, comprising only 1.5% of the assemblage in one of four samples that were dominated by the native species Ammonia tepida and...
Authors
Mary McGann
Science and Products
Filter Total Items: 15
Invertebrate remains from the Dominican University of California archaeological site MRN-CA-254, Marin County, California Invertebrate remains from the Dominican University of California archaeological site MRN-CA-254, Marin County, California
This data release indicates faunal presence or absence of shelly artifacts (invertebrate remains) from the Dominican University of California archaeological site MRN-CA-254, Marin County, California.
Sediment core data from the northern flank of Monterey Canyon, offshore California Sediment core data from the northern flank of Monterey Canyon, offshore California
The five files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, north of Monterey Canyon, offshore central California. Vibracores and push cores were collected with the Monterey Bay Aquarium Research Institutes remotely operated vehicle (ROV) Doc Ricketts in 2014 (cruise ID 2014-615-FA). One spreadsheet
Sediment core data from offshore Palos Verdes, California Sediment core data from offshore Palos Verdes, California
The seven files included in this U.S. Geological Survey data release are data from a set of sediment cores acquired from the continental slope, offshore Los Angeles and the Palos Verdes Peninsula, adjacent to the Palos Verdes Fault. Gravity cores were collected by the USGS in 2009 (cruise ID S-I2-09-SC; http://cmgds.marine.usgs.gov/fan_info.php?fan=SI209SC), and vibracores were collected...
Filter Total Items: 75
Impact of climate change on mollusks and other invertebrate resources at the Dominican University of California archaeological site (CA-MRN-254), Marin County, California Impact of climate change on mollusks and other invertebrate resources at the Dominican University of California archaeological site (CA-MRN-254), Marin County, California
We have identified and provided ecological interpretations of 30 taxa recovered at two shellmounds at the Dominican University of California archaeology site in Marin County, California (CA-MRN-254). A Q-mode cluster analysis was used to group the samples according to their faunal similarity. The clusters ranged from a diverse grouping of 100 samples with 27 taxa (Cluster A) to those...
Authors
Mary McGann, Charles Powell
Marine paleoseismic evidence for seismic and aseismic slip along the Hayward-Rodgers Creek fault system in northern San Pablo Bay Marine paleoseismic evidence for seismic and aseismic slip along the Hayward-Rodgers Creek fault system in northern San Pablo Bay
Distinguishing between seismic and aseismic fault slip in the geologic record is difficult, yet fundamental to estimating the seismic potential of faults and the likelihood of multi-fault ruptures. We integrated chirp sub-bottom imaging with targeted cross-fault coring and core analyses of sedimentary proxy data to characterize vertical deformation and slip behavior within an extensional...
Authors
Janet Watt, Mary McGann, Renee Takesue, Thomas Lorenson
Potential use of the benthic foraminifers Bulimina denudata and Eggerelloides advenus in marine sediment toxicity testing Potential use of the benthic foraminifers Bulimina denudata and Eggerelloides advenus in marine sediment toxicity testing
The benthic foraminifers Bulimina denudata and Eggerelloides advenus are commonly abundant in offshore regions in the Pacific Ocean, especially in waste-discharge sites. The relationship between their abundance and standard macrofaunal sediment toxicity tests (amphipod survival and sea urchin fertilization) as well as sediment chemistry analyte measurements were determined for sediments...
Authors
Mary McGann
Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers
Turbidity currents dominate sediment transfer into the deep ocean, and can damage critical seabed infrastructure. It is commonly inferred that powerful turbidity currents are triggered by major external events, such as storms, river floods, or earthquakes. However, basic models for turbidity current triggering remain poorly tested, with few studies accurately recording precise flow...
Authors
Lewis Bailey, Michael Clare, Kurt Rosenberger, Matthieu Cartigny, Peter Talling, Charles Paull, Roberto Gwiazda, Daniel Parsons, Stephen Simmons, Jingping Xu, Ivan Haigh, Katherine Maier, Mary McGann, Eve Lundsten
Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada) Focused fluid flow and methane venting along the Queen Charlotte fault, offshore Alaska (USA) and British Columbia (Canada)
Fluid seepage along obliquely deforming plate boundaries can be an important indicator of crustal permeability and influence on fault-zone mechanics and hydrocarbon migration. The ~850-km-long Queen Charlotte fault (QCF) is the dominant structure along the right-lateral transform boundary that separates the Pacific and North American tectonic plates offshore southeastern Alaska (USA) and...
Authors
Nancy Prouty, Daniel Brothers, Jared Kluesner, J. Vaughn Barrie, Brian Andrews, Rachel Lauer, Gary Greene, James Conrad, Thomas Lorenson, Michael Law, Diana Sahy, Kim Conway, Mary McGann, Peter Dartnell
What determines the downstream evolution of turbidity currents? What determines the downstream evolution of turbidity currents?
Seabed sediment flows called turbidity currents form some of the largest sediment accumulations, deepest canyons and longest channel systems on Earth. Only rivers transport comparable sediment volumes over such large areas; but there are far fewer measurements from turbidity currents, ensuring they are much more poorly understood. Turbidity currents differ fundamentally from rivers, as...
Authors
Catharina Heerema, Peter Talling, Matthieu Cartigny, Charles Paull, Lewis Bailey, Stephen Simmons, Daniel Parsons, Michael Clare, Roberto Gwiazda, Eve Lundsten, Krystle Anderson, Katherine Maier, Jingping Xu, Esther J. Sumner, Kurt Rosenberger, Jenny Gales, Mary McGann, Lionel Carter, Ed Pope
Shallow-water foraminifera and other microscopic biota of Clipperton Island, tropical eastern Pacific Shallow-water foraminifera and other microscopic biota of Clipperton Island, tropical eastern Pacific
The recent foraminiferal fauna and associated microbiota of Clipperton Island (10.2833°N, 109.2167°W) were investigated at 20 sites collected in the intertidal zone around the perimeter of the island and from the edge of the inner brackish-water lagoon. Due to the island’s geographic location in a low productivity zone, a lack of variable habitats on and surrounding the island, and heavy...
Authors
Mary McGann, Robert Schmieder, Louis-Philippe Loncke
A ship's ballasting history as an indicator of foraminiferal invasion potential--An example from Prince William Sound, Alaska, USA A ship's ballasting history as an indicator of foraminiferal invasion potential--An example from Prince William Sound, Alaska, USA
We investigated the potential role of ballast sediment from coastal and transoceanic oil tankers arriving and de-ballasting in Port Valdez as a vector for the introduction of invasive benthic foraminifera in Prince William Sound, Alaska. Forty-one ballast sediment samples were obtained in 1998-1999 from 11 oil tankers that routinely discharged their ballast in Prince William Sound after...
Authors
Mary McGann, Gregory Ruiz, Anson Hines, George Smith
Sediment and organic carbon transport and deposition driven by internal tides along Monterey Canyon, offshore California Sediment and organic carbon transport and deposition driven by internal tides along Monterey Canyon, offshore California
Submarine canyons provide globally important conduits for sediment and organic carbon transport into the deep-sea. Using a novel dataset from Monterey Canyon, offshore central California, that includes an extensive array of water column sampling devices, we address how fine-grained sediment and organic carbon are transported, mixed, fractionated, and buried along a submarine canyon...
Authors
Katherine Maier, Kurt Rosenberger, Charles Paull, Roberto Gwiazda, Jenny Gales, Thomas Lorenson, James P. Barry, Peter Talling, Mary McGann, Jingping Xu, Eve Lundsten, Krystle Anderson, Steven Litvin, Daniel Parsons, Michael Clare, Stephen Simmons, Esther J. Sumner, Matthieu Cartigny
Linking direct measurements of turbidity currents to submarine canyon-floor deposits Linking direct measurements of turbidity currents to submarine canyon-floor deposits
Submarine canyons are conduits for episodic and powerful sediment density flows (commonly called turbidity currents) that move globally significant amounts of terrestrial sediment and organic carbon into the deep sea, forming some of the largest sedimentary deposits on Earth. The only record available for most turbidity currents is the deposit they leave behind. Therefore, to understand...
Authors
Katherine Maier, Jenny Gales, Charles Paull, Kurt Rosenberger, Peter Talling, Stephen Simmons, Roberto Gwiazda, Mary McGann, Matthieu Cartigny, Eve Lundsten, Krystle Anderson, Michael Clare, Jingping Xu, Daniel Parsons, James P. Barry, Monica Wolfson-Schwher, Nora Nieminski, Esther J. Sumner
Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California
Multi-beam mapping of the Santa Monica Basin in the eastern Pacific has revealed the existence of a number of elevated bathymetric features, or mounds, harboring cold seep communities. During 2013-2014, mounds at ~600 m water depth were observed for the first time and sampled by Monterey Bay Aquarium Research Institute’s ROV Doc Ricketts. Active cold seeps were found, but surprisingly...
Authors
Magdalena Georgieva, Charles Paull, Crispin Little, Mary McGann, Diana Sahy, Daniel Condon, Lonny Lundsten, Jack Pewsey, David W Caress, Robert Vrijenhoek
Initial dispersal (1986-1987) of the invasive foraminifera Trochammina hadai Uchio in San Francisco Bay, California, USA Initial dispersal (1986-1987) of the invasive foraminifera Trochammina hadai Uchio in San Francisco Bay, California, USA
A time series of three closely-spaced data sets are used to track the early expansion of the invasive Japanese benthic foraminifera Trochammina hadai in the southern portion of San Francisco Bay known as South Bay. The species initially appeared in 1983, comprising only 1.5% of the assemblage in one of four samples that were dominated by the native species Ammonia tepida and...
Authors
Mary McGann