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GCE-LTER Data Set Summary
Accession:
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GEL-GCES-1402
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Research Theme:
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Geology (Directed Study)
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Contributors:
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John A. Turck, Clark Alexander
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Title:
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Vibracore and Tree Stump Data from the Marsh Near Mary Hammock, McIntosh County, GA
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Abstract:
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The purpose of this study was to determine the geologic/ sedimentologic history of the marsh near Mary Hammock, a marsh island in McIntosh County, GA. During the Summer of 2009, a vibracore machine was used to extract six sediment cores (MT01 through MT06) from the marsh north of Mary Hammock. In addition, tree stumps buried under the marsh were recorded, and one was extracted and analyzed, to facilitate in understanding the sedimentological history of the marsh. A GPS unit was used to record the precise locations and elevations of the core extraction sites and stumps. The cores were then transported to the Georgia Southern Coastal Research Lab at the Skidaway Institute of Oceanography (SkIO), in Savannah, GA, for analysis. The tree stump was brought back to the University of Georgia for analysis. Although there was a large degree of bioturbation in the marsh near Mary Hammock, sediment core analysis (visual inspection, X-Ray analysis, particle size analysis, and analysis of organic matter content), and stump analysis (species determination and radiocarbon dating), revealed three main facies in the marsh. The topmost layer is recent marsh. The middle layer is a sandy layer, representing the former upland surface prior to sea level rise, inundation, and marsh formation (around 5,000 to 4,000 years ago). The bottom layer is a highly compact greenish-gray clay layer. The conclusion is that the former upland surface, consisting mostly of sandy soils, was inundated due to sea level rise around 4,200 B.P. Marsh sedimentation occurred after this, depositing fine-grained sediments on top of the sandy surface (Turck and Alexander, 2013).
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DOI:
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10.6073/pasta/4541ae084d807962b8c331eea61908bd
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Key Words:
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cores, geographic information systems, hammock, historical, holocene, landscape change, salt marshes, sea level
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LTER Core Area:
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Other Site Research
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Research Themes:
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Geology, Geospatial Analysis, Organic Matter/Decomposition |
Study Period:
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01-Jun-2009 to 01-Sep-2009
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Study Sites:
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PN_v_23 -- Hammock PN_v_23, Sapelo Island, Georgia, USA
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Publications:
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Turck, J.A. 2011. Geoarchaeological analysis of two back-barrier islands and their relationship to the changing landscape of coastal Georgia, U.S.A. Ph.D. Dissertation. University of Georgia, Athens, GA. 239 pages.
Turck, J.A. 2012. Where Were All of the Coastally Adapted People During the Middle Archaic Period in Georgia, USA? Journal of Island and Coastal Archaeology. 7:404–424. (DOI: 10.1080/15564894.2011.652763)
Turck, J.A. and Alexander, C.R. Jr. 2013. Coastal Landscapes and their Relationship to Human Settlement on the Georgia Coast. Pages 169-189 in: Thompson, V.D. and Thomas, D.H. (editors). Life Among the Tides - Recent Archaeology on the Georgia Bight. American Museum of Natural History—Scientific Publications, New York, NY.
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Downloads:
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Data Table: GEL-GCES-1402_sampling (Sampling and location data for data set GEL-GCES-1402, 8 records)
Access: Public (released 20-Feb-2014)
Metadata: Text (ESA FLED),
XML (Ecological Metadata Language)
Data Formats: Spreadsheet (CSV) [2.37kb], Text File [1.23kb], MATLAB (GCE Toolbox) [148.05kb], MATLAB (Variables) [113.18kb], Text Report [31.18kb]
Column List:(display)
Column |
Name |
Units |
Type |
Description |
1 |
Type |
none |
string |
Data type (i.e., vibracore or tree stump). |
2 |
Name |
none |
string |
Unique name given each data sampling location. |
3 |
East_NAD83 |
meters |
floating-point |
Easting (X) coordinate of the sampling location, in the UTM coordinate system, Zone 17, and the North American Datum of 1983 |
4 |
Flag_East_NAD83 |
none |
string |
QA/QC flags for Easting (X) coordinate of the sampling location, in the UTM coordinate system, Zone 17, and the North American Datum of 1983 (flagging criteria, where "x" is East_NAD83: ) |
5 |
Nrth_NAD83 |
meters |
floating-point |
Northing (Y) coordinate of the sampling location, in the UTM coordinate system, Zone 17, and the North American Datum of 1983 |
6 |
Flag_Nrth_NAD83 |
none |
string |
QA/QC flags for Northing (Y) coordinate of the sampling location, in the UTM coordinate system, Zone 17, and the North American Datum of 1983 (flagging criteria, where "x" is Nrth_NAD83: ) |
7 |
Extraction |
none |
string |
Yes or No column indicating whether or not a sample was extracted from the location. |
8 |
Vegetation |
none |
string |
Vegetation type noted on the surface of the marsh |
9 |
Elv_NAVD88 |
centimeters |
floating-point |
Present-day elevation of the marsh surface, in cm above NAVD88 |
10 |
Flag_Elv_NAVD88 |
none |
string |
QA/QC flags for Present-day elevation of the marsh surface, in cm above NAVD88 (flagging criteria, where "x" is Elv_NAVD88: ) |
11 |
Elev_MLLW |
centimeters |
floating-point |
Present-day elevation of the marsh surface, in cm above mean lower low water |
12 |
Flag_Elev_MLLW |
none |
string |
QA/QC flags for Present-day elevation of the marsh surface, in cm above mean lower low water (flagging criteria, where "x" is Elev_MLLW: ) |
13 |
Marsh_Thic |
none |
string |
Thickness of the present-day marsh layer in centimeters, in absolute or range format |
14 |
Flag_Marsh_Thic |
none |
string |
QA/QC flags for Thickness of the present-day marsh layer, in absolute or range format (flagging criteria, where "x" is Marsh_Thic: ) |
15 |
Sand_Elev |
none |
string |
Elevation of the top of the sand layer, which is underneath the present-day marsh, in absolute or range foramt, in cm above Mean Lower Low Water |
16 |
Flag_Sand_Elev |
none |
string |
QA/QC flags for Elevation of the top of the sand layer, which is underneath the present-day marsh, in absolute orr ange foramt, in cm above Mean Lower Low Water (flagging criteria, where "x" is Sand_Elev: ) |
17 |
Sand_Thick |
none |
string |
Thickness of the sand layer in centimeters, in absolute or range format |
18 |
Flag_Sand_Thick |
none |
string |
QA/QC flags for Thickness of the sand layer, in absolute or range format (flagging criteria, where "x" is Sand_Thick: ) |
19 |
Clay_Elev |
centimeters |
floating-point |
Elevation of the top of the greeen-grey clay layer, which is underneath the sand layer, in cm above Mean Lower Low Water |
20 |
Flag_Clay_Elev |
none |
string |
QA/QC flags for Elevation of the top of the greeen-grey clay layer, which is underneath the sand layer, in cm above Mean Lower Low Water (flagging criteria, where "x" is Clay_Elev: ) |
21 |
Clay_Thick |
none |
string |
Thickness of the green-grey clay layer in centimeters, which is greater than |
22 |
Flag_Clay_Thick |
none |
string |
QA/QC flags for Thickness of the green-grey clay layer, which is greater than (flagging criteria, where "x" is Clay_Thick: ) |
23 |
Sampl_Lgth |
centimeters |
floating-point |
Length of the entire sediment sample, after compaction |
24 |
Flag_Sampl_Lgth |
none |
string |
QA/QC flags for Length of the entire sediment sample, after compaction (flagging criteria, where "x" is Sampl_Lgth: ) |
25 |
Removed |
centimeters |
floating-point |
Length of the top layer of marsh sediment removed prior to coring |
26 |
Flag_Removed |
none |
string |
QA/QC flags for Length of the top layer of marsh sediment removed prior to coring (flagging criteria, where "x" is Removed: ) |
27 |
Compaction |
centimeters |
floating-point |
Amount of soil compaction that occurred during coring |
28 |
Flag_Compaction |
none |
string |
QA/QC flags for Amount of soil compaction that occurred during coring (flagging criteria, where "x" is Compaction: ) |
Data Table: GEL-GCES-1402_sediment_analysis (Sediment particle size and organic matter content for data set GEL-GCES-1402, 55 records)
Access: Public (released 20-Feb-2014)
Metadata: Text (ESA FLED),
XML (Ecological Metadata Language)
Data Formats: Spreadsheet (CSV) [5.74kb], Text File [4.07kb], MATLAB (GCE Toolbox) [155.17kb], MATLAB (Variables) [116.98kb], Text Report [31.46kb]
Column List:(display)
Column |
Name |
Units |
Type |
Description |
1 |
Name |
none |
string |
Unique name given each data sampling location. |
2 |
Distance_Above_MLLW |
none |
string |
Elevation range from where the sediment sample was extracted, in centimeters above Mean Lower Low Water |
3 |
Distance_Below_Ground_Surface |
centimeters |
floating-point |
Relative location within core (or near the stump) where sediment sample was extracted, in cm below ground surface |
4 |
Flag_Distance_Below_Ground_Surface |
none |
string |
QA/QC flags for Relative location within core (or near the stump) where sediment sample was extracted, in cm below ground surface (flagging criteria, where "x" is Distance_Below_Ground_Surface: ) |
5 |
Percent_Sand |
percent |
floating-point |
Percent sand in the sediment sample |
6 |
Flag_Percent_Sand |
none |
string |
QA/QC flags for Percent sand in the sediment sample (flagging criteria, where "x" is Percent_Sand: x<0="I", x>100="I") |
7 |
Percent_Silt |
percent |
floating-point |
Percent silt in the sediment sample |
8 |
Flag_Percent_Silt |
none |
string |
QA/QC flags for Percent silt in the sediment sample (flagging criteria, where "x" is Percent_Silt: x<0="I", x>100="I") |
9 |
Percent_Clay |
percent |
floating-point |
Percent clay in the sediment sample |
10 |
Flag_Percent_Clay |
none |
string |
QA/QC flags for Percent clay in the sediment sample (flagging criteria, where "x" is Percent_Clay: x<0="I", x>100="I") |
11 |
Soil_Texture |
none |
string |
Soil texture classification terms for sediment samples, from the USDA |
12 |
Lab_ID |
none |
integer |
Unique laboratory identifier for organic matter sample, assigned by lab |
13 |
Sample_ID |
none |
string |
Unique sample identifier for organic matter sample, assigned by John Turck |
14 |
Percent_Organic_Matter |
percent |
floating-point |
Organic matter content in the sediment sample in percent by weight of sample |
15 |
Flag_Percent_Organic_Matter |
none |
string |
QA/QC flags for Organic matter content in the sediment sample in percent by weight of sample (flagging criteria, where "x" is Percent_Organic_Matter: x<0="I", x>100="I") |
16 |
Total_Carbon |
percent |
floating-point |
Total inorganic and organic carbon in the sediment sample in percent by weight of sample |
17 |
Flag_Total_Carbon |
none |
string |
QA/QC flags for Total inorganic and organic carbon in the sediment sample in percent by weight of sample (flagging criteria, where "x" is Total_Carbon: x<0="I", x>100="I") |
GIS Vector Data: GEL-GCES-1402_shp (Zip file containing GIS shape file)
Access: Public (released 20-Feb-2014)
Metadata: XML (Ecological Metadata Language)
Data Formats: Zip archive [3 KB]
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Statistics:
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Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS |
Citation:
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Turck, John A. 2014. Vibracore and Tree Stump Data from the Marsh Near Mary Hammock, McIntosh County, GA. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/4541ae084d807962b8c331eea61908bd
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