Abstract:
Sedimentologic and topographic data from Hurricane Sandy washover deposits were collected from Southern Long Beach Island, New Jersey, in order to document changes to the barrier-island beaches, dunes, and coastal wetlands due to Hurricane Sandy and subsequent storm events. These data will provide a baseline dataset for use in future coastal change descriptive and predictive studies and assessments. The data presented here were collected as part of the U.S. Geological Survey’s Barrier Island and Estuarine Wetland Physical Change Assessment project (
http://coastal.er.usgs.gov/sandy-wetland-assessment/), which aims to assess ecological and societal vulnerability that results from long- and short-term physical changes to barrier islands and coastal wetlands. This metadata record describes data that were collected in April 2015, approximately two and a half years after Hurricane Sandy’s landfall on 29 October 2012. During the field campaign, washover deposits were photographed, and described. In addition, sediment samples, cores, and surface elevations were collected. Data collected during this study including sample locations and elevations, core photographs, computed tomography (CT) scans, descriptive core logs, sediment grain-size data, and accompanying Federal Geographic Data Committee (FGDC) metadata are provided in the associated USGS Data Release, available at
https://doi.org/10.5066/F7PK0D7S.
BH15_GrainSize_Data.zip includes a data dictionary, .csv files, and accompanying metadata summarizing the results of grain-size analyses for sediments from sediment cores collected April 7-14, 2015, from southern Long Beach Island, New Jersey (USGS Field Activity Number (FAN) 2015-611-FA).
Supplemental_Information:
Samples used for grain-size analysis were placed into a 1000 ml beaker filled with 200-500 ml of deionized water. Organics were removed by adding 5-10 ml of 30% hydrogen peroxide and allowing the sample to oxidize overnight. Following the oxidation the samples were heated to drive off excess hydrogen peroxide. Samples were than washed twice via centrifugation in order to remove all soluble chemicals and excess organic material. Following washing, the samples were wet sieved to segregate them into three broad size fractions: Course/Gravel (>2mm); Intermediate/Sand (2.00 mm - 0.063mm); and Mud (silt and clay) composed of the material < 0.063mm. Both sand and gravel fractions were dried in an 80°C oven and weighed. 5 mLof calgon (sodium hexametaphosphate) solution was added to the mud fraction cylinder and distilled water was added to total the volume to 1L. The mud + calgon solution sat overnight to ensure removal of the mud particles’ negative charges. Subsequently, a 20 mL aliquot was taken from the 1 L mud fraction to determine the weight of the mud.
The gravel fraction was separated with sieves and binned at 1/4phi intervals. The sand and mud fractions were analyzed with a Beckman Coulter LS 13-320 laser diffraction particle size analyzer at 1/4 phi size intervals. The particle size data was then combined and processed with the PCMSC software called pcSDSZ, which determines the particle size distribution according to graphical statistics using the formulas of Folk and Ward (1957) Folk, (1966,1974), Inman (1952), and Trask (1930 and 1932), as well as Moment Measures (Collias and others 1963). The raw grain size data were also run through the program GRADISTAT (Blott and Pye, 2001) in order to calculate geometric (in metric units) mean, sorting, skewness, and kurtosis of each sample using the Folk and Ward (1957) method. GRADISTAT also calculates the fraction of sediment from each sample by size category (for example, clay, coarse silt, fine sand) based on a modified Wentworth (1922) size scale.
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:3330ede3-0ae4-4e14-b78e-08807c1dc98e
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geomorphology
Theme_Keyword: unconsolidated deposits
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: overwash
Theme_Keyword: sediment
Theme_Keyword: sand auger
Theme_Keyword: grain size
Theme_Keyword: GRADISTAT
Theme_Keyword: mean
Theme_Keyword: sorting
Theme_Keyword: skewness
Theme_Keyword: kurtosis
Theme_Keyword: Folk and Ward
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: New Jersey
Place_Keyword: Long Beach Island
The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data.
Citation_Information:
Originator:
Bishop, J.M., Richmond, B.M., Zaremba, N.J., Lunghino, B.D., and Kane, H.K.
Publication_Date: 2016
Title:
Hurricane Sandy Washover Deposits on Southern Long Beach Island, New Jersey
Edition: 1
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: Open-File Report 2016–1090
Other_Citation_Details:
Publications listed in the process step are all cited in Open-File Report 2016-1090.
Online_Linkage: https://doi.org/10.3133/ofr20161090
