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Cheyenne Everhart

Cheyenne Everhart is a Physical Scientist at the St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida.

Science and Products

Filter Total Items: 16

Sedimentologic Data From Vibracores Collected in 2023 From St. Andrew Bay, Florida

In April 2023, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) collected 11 sediment vibracores within East Bay, St. Andrew Bay, Florida (FL). Sediment vibracore and lithology data in this data release provide assessments on the composition and age of sediments below the seafloor. This data release serves as an archive of sediment vibrac
By
St. Petersburg Coastal and Marine Science Center

Sediment Data from Vibracores Collected in 2021 From Central Florida Gulf Coast Barrier Islands

In 2021, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) conducted ground penetrating radar (GPR) and sediment sampling surveys on barrier islands located along the central Florida Gulf Coast (CFGC), Pinellas County, Florida. This study investigated the past evolution of the CFGC from field sites at Anclote Keys, Caladesi and Honeymoon Isla
By
St. Petersburg Coastal and Marine Science Center

Sediment Data From Vibracores and Sand Augers Collected in 2021 and 2022 From Fire Island, New York

In 2021 and 2022, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS New York Water Science Center (NYWSC), on behalf of SPCMSC, conducted sediment sampling and ground penetrating radar (GPR) surveys at Point O' Woods and Ho-Hum Beach (NYWSC, 2021) and Watch Hill, Long Cove, and Smith Point (SPCMSC, 2022), Fire Island, New York.
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Radioanalytical Measurements on Samples From Submarine, Karstic Carbonate Features Along the West Florida Shelf

Relict karstic features, often referred to as blue holes, are common features along continental shelves that are underlain by carbonate rich sediments and/or rocks. Several of these features occur along the west-Florida shelf within the Gulf of Mexico, including the two mentioned in this data product: Amberjack Hole and Green Banana Sink (hereafter referred to as Green Banana). Scientists from U.S

By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Grain-Size Data From Sediment Samples at Seven Mile Island, New Jersey and Rockaway Peninsula, New York

Sediment grab samples were collected from one onshore location and 32 undisturbed locations along the seafloor around Seven Mile Island, New Jersey (NJ) and Rockaway Peninsula, New York (NY). The sediment grab samples were collected in May and June of 2021 at locations within the area where multibeam bathymetry surveys were also conducted during the same trip. All sediment samples were analyzed us
By
St. Petersburg Coastal and Marine Science Center

Radiochemical Data From Sediment Cores Collected on Deer Island, Mississippi

In December 2021, four sediment push cores (core names appended with 'M' for marsh push core) and peat augers (core names appended with 'R' for Russian peat auger) were collected from the marshes of Deer Island, Mississippi during U.S. Geological Survey (USGS) field activity number (FAN) 2021-351-FA. Select intervals from the manual push cores were analyzed for determination of lead-210 activities
By
St. Petersburg Coastal and Marine Science Center

Sediment and Radiochemical Characteristics from Shore-Perpendicular Estuarine and Marsh Transects in the Grand Bay National Estuarine Research Reserve, Mississippi

To examine sediment transport and provenance between a marsh and estuary, surface sediments were collected along two transects in the Grand Bay National Estuarine Research Reserve, Mississippi (GNDNERR). Each shore-perpendicular transect consisted of fifteen surface samples, collected every 2.5 meters (m) from 10-m out into the estuary to 25-m into the marsh from the shoreline. Sediment samples we
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Surficial and Downcore Sedimentological and Foraminiferal Microfossil Data From St. Marks National Wildlife Refuge, Florida

In October 2019, five marsh push cores (core names appended with M for marsh push core) and 18 surface sediment samples (top 1 cm of sediment) were collected from the estuary (sample name appended G for PONAR grab) near the mouth of the St. Marks River and some of the surrounding marshes (sample name appended with S for surface) along with elevation transects and peat augers (sample name appended
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Grain-Size Data from Upper Florida Keys: Crocker Reef, FL

Sediment samples were collected from undisturbed sections of the seafloor around Crocker Reef, Florida which is a senile, degrading barrier reef located in the northern portion of the Florida Reef Tract (Figure 1). Samples were collected from November 2017 to April 2019. The sediment sample locations were near instruments deployed during the same period to record time series of ocean currents, wav
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Sedimentologic Data from Point aux Chenes Marsh and Estuary, Mississippi

Sediment samples, including marsh and estuarine surface samples and marsh push and peat-auger cores, were collected from Point aux Chenes, Mississippi from October 23-26, 2018, and August 4, 2021. Marsh surface samples (top 1 centimeter (cm) of sediment; sample names appended with S), marsh push cores (core names appended with M) and peat-auger cores (core names appended with R) were collected alo
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Sediment Radiochemical Data from Georgia, Massachusetts and Virginia Coastal Marshes

This data release is an archive of sedimentary laboratory analytical data produced by scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) for sediment cores and surface samples collected from coastal marshes in Georgia (GA), Virginia (VA), and Massachusetts (MA). Collaborators from USGS Patuxent Wildlife Research Center (PWRC) and the Virginia
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Shore Proximal Marsh Sediment Deposition and Ancillary Data From Grand Bay National Estuarine Research Reserve, Mississippi, From July 2018 to January 2020 (Version 2.0)

To better understand sediment deposition in marsh environments, scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) selected four study sites (Sites 5, 6, 7, and 8) along the Point Aux Chenes Bay shoreline of the Grand Bay National Estuarine Research Reserve (GNDNERR), Mississippi. These data sets were collected to serve as baseline data prior
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Two scientists use a cylinder to collect mud in a grassy marsh
USGS geologists study sediment exchange in estuary and marshes
USGS geologists study sediment exchange in estuary and marshes
Two scientists use a cylinder to collect mud in a grassy marsh

USGS geologists study sediment exchange in estuary and marshes

USGS geologists study sediment exchange in estuary and marshes

Sediments in estuarine and marsh environments contain organic peat, or material derived from life, that plays an important role in ecosystem health. Here, USGS geologist Chris Smith of the St.

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Two scientists use a cylinder to collect mud in a grassy marsh

USGS geologists study sediment exchange in estuary and marshes

USGS geologists study sediment exchange in estuary and marshes

Sediments in estuarine and marsh environments contain organic peat, or material derived from life, that plays an important role in ecosystem health. Here, USGS geologist Chris Smith of the St.

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Science and Products

Filter Total Items: 16

Sedimentologic Data From Vibracores Collected in 2023 From St. Andrew Bay, Florida

In April 2023, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) collected 11 sediment vibracores within East Bay, St. Andrew Bay, Florida (FL). Sediment vibracore and lithology data in this data release provide assessments on the composition and age of sediments below the seafloor. This data release serves as an archive of sediment vibrac
By
St. Petersburg Coastal and Marine Science Center

Sediment Data from Vibracores Collected in 2021 From Central Florida Gulf Coast Barrier Islands

In 2021, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) conducted ground penetrating radar (GPR) and sediment sampling surveys on barrier islands located along the central Florida Gulf Coast (CFGC), Pinellas County, Florida. This study investigated the past evolution of the CFGC from field sites at Anclote Keys, Caladesi and Honeymoon Isla
By
St. Petersburg Coastal and Marine Science Center

Sediment Data From Vibracores and Sand Augers Collected in 2021 and 2022 From Fire Island, New York

In 2021 and 2022, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) and the USGS New York Water Science Center (NYWSC), on behalf of SPCMSC, conducted sediment sampling and ground penetrating radar (GPR) surveys at Point O' Woods and Ho-Hum Beach (NYWSC, 2021) and Watch Hill, Long Cove, and Smith Point (SPCMSC, 2022), Fire Island, New York.
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Radioanalytical Measurements on Samples From Submarine, Karstic Carbonate Features Along the West Florida Shelf

Relict karstic features, often referred to as blue holes, are common features along continental shelves that are underlain by carbonate rich sediments and/or rocks. Several of these features occur along the west-Florida shelf within the Gulf of Mexico, including the two mentioned in this data product: Amberjack Hole and Green Banana Sink (hereafter referred to as Green Banana). Scientists from U.S

By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center, Gulf of Mexico

Grain-Size Data From Sediment Samples at Seven Mile Island, New Jersey and Rockaway Peninsula, New York

Sediment grab samples were collected from one onshore location and 32 undisturbed locations along the seafloor around Seven Mile Island, New Jersey (NJ) and Rockaway Peninsula, New York (NY). The sediment grab samples were collected in May and June of 2021 at locations within the area where multibeam bathymetry surveys were also conducted during the same trip. All sediment samples were analyzed us
By
St. Petersburg Coastal and Marine Science Center

Radiochemical Data From Sediment Cores Collected on Deer Island, Mississippi

In December 2021, four sediment push cores (core names appended with 'M' for marsh push core) and peat augers (core names appended with 'R' for Russian peat auger) were collected from the marshes of Deer Island, Mississippi during U.S. Geological Survey (USGS) field activity number (FAN) 2021-351-FA. Select intervals from the manual push cores were analyzed for determination of lead-210 activities
By
St. Petersburg Coastal and Marine Science Center

Sediment and Radiochemical Characteristics from Shore-Perpendicular Estuarine and Marsh Transects in the Grand Bay National Estuarine Research Reserve, Mississippi

To examine sediment transport and provenance between a marsh and estuary, surface sediments were collected along two transects in the Grand Bay National Estuarine Research Reserve, Mississippi (GNDNERR). Each shore-perpendicular transect consisted of fifteen surface samples, collected every 2.5 meters (m) from 10-m out into the estuary to 25-m into the marsh from the shoreline. Sediment samples we
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Surficial and Downcore Sedimentological and Foraminiferal Microfossil Data From St. Marks National Wildlife Refuge, Florida

In October 2019, five marsh push cores (core names appended with M for marsh push core) and 18 surface sediment samples (top 1 cm of sediment) were collected from the estuary (sample name appended G for PONAR grab) near the mouth of the St. Marks River and some of the surrounding marshes (sample name appended with S for surface) along with elevation transects and peat augers (sample name appended
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Grain-Size Data from Upper Florida Keys: Crocker Reef, FL

Sediment samples were collected from undisturbed sections of the seafloor around Crocker Reef, Florida which is a senile, degrading barrier reef located in the northern portion of the Florida Reef Tract (Figure 1). Samples were collected from November 2017 to April 2019. The sediment sample locations were near instruments deployed during the same period to record time series of ocean currents, wav
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Sedimentologic Data from Point aux Chenes Marsh and Estuary, Mississippi

Sediment samples, including marsh and estuarine surface samples and marsh push and peat-auger cores, were collected from Point aux Chenes, Mississippi from October 23-26, 2018, and August 4, 2021. Marsh surface samples (top 1 centimeter (cm) of sediment; sample names appended with S), marsh push cores (core names appended with M) and peat-auger cores (core names appended with R) were collected alo
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Sediment Radiochemical Data from Georgia, Massachusetts and Virginia Coastal Marshes

This data release is an archive of sedimentary laboratory analytical data produced by scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) for sediment cores and surface samples collected from coastal marshes in Georgia (GA), Virginia (VA), and Massachusetts (MA). Collaborators from USGS Patuxent Wildlife Research Center (PWRC) and the Virginia
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center

Shore Proximal Marsh Sediment Deposition and Ancillary Data From Grand Bay National Estuarine Research Reserve, Mississippi, From July 2018 to January 2020 (Version 2.0)

To better understand sediment deposition in marsh environments, scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center (USGS-SPCMSC) selected four study sites (Sites 5, 6, 7, and 8) along the Point Aux Chenes Bay shoreline of the Grand Bay National Estuarine Research Reserve (GNDNERR), Mississippi. These data sets were collected to serve as baseline data prior
By
Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Two scientists use a cylinder to collect mud in a grassy marsh
USGS geologists study sediment exchange in estuary and marshes
USGS geologists study sediment exchange in estuary and marshes
Two scientists use a cylinder to collect mud in a grassy marsh

USGS geologists study sediment exchange in estuary and marshes

USGS geologists study sediment exchange in estuary and marshes

Sediments in estuarine and marsh environments contain organic peat, or material derived from life, that plays an important role in ecosystem health. Here, USGS geologist Chris Smith of the St.

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
Two scientists use a cylinder to collect mud in a grassy marsh

USGS geologists study sediment exchange in estuary and marshes

USGS geologists study sediment exchange in estuary and marshes

Sediments in estuarine and marsh environments contain organic peat, or material derived from life, that plays an important role in ecosystem health. Here, USGS geologist Chris Smith of the St.

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, St. Petersburg Coastal and Marine Science Center
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