Beach Pads and Beach Cusps, St. Joseph Peninsula (Lee D. Entsminger Thesis)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Christopher J. Jenkins
Publication_Date: 2002
Title:
Beach Pads and Beach Cusps, St. Joseph Peninsula (Lee D. Entsminger Thesis)
Geospatial_Data_Presentation_Form: document
Other_Citation_Details:
Geology Department, Forida State University, Tallahassee, FL 32306
Online_Linkage:
Description:
Abstract:
This study is an investigation of beach pads and beach cusps on St. Joseph Spit, Franklin County, Florida. A beach pad is defined as a roughly triangular shoreline feature with its base parallel to shore and the next longest side being updrift. An associated bar extends from the most seaward point of the pad, in a downdrift direction, nearly parallel to the updrift side. A beach cusp is defined as a cuspate feature which usually occurs in groups along the foreshore as a series of alternating horns (pointing seaward) and embayments. Coarser sediments are associated with the horns. Both features were examined by field investigation of associated wave parameters, form and internal structure, as well as water and grain motion occurring around both beach pads and cusps. Laboratory procedures included study of landsat imagery and air photos for the occurrence and measurement of physical parameters of beach pads and cusps. Laminae samples from both types of features, taken in the field, were subjected to granulometric evaluation by sieving and subsequent statistical treatment. Beach cusps in the study area were found to have two mean spacings: 12 meters and 38 meters. The 12 meter beach cusps were often associated with beach pads and occurred along the active foreshore. The 38 meter cusps were found higher on the beach after storms and are referred to as "storm cusps". Both sizes of beach cusps were commonly found to be asymmetric, pointing into the direction of wave attack. Granulometric analysis showed that sediments collecting on the horns were coarser than those in the embayments. Beach cusps were observed forming in the presence of intersecting waves of different wavelengths. The sequence of wave and cusp interaction was documented. It was concluded that beach cusp asymmetry is the result of oblique wave attack and that maintainence of these cusps was due to a regular variation in swash energy along the foreshore. Both intersecting waves and langmuir circulation were postulated as possible causes of this variation in swash energy. Beach pads were found along the shoreline of St.Joseph Spit. They were observed in groups alternating with embayments (which often cut into the dune-ridge). Beach pad length varied from 100 meters to over 400 meters. Beach pads were observed t~ migrate downdrift under oblique wave attack. Migration rates varied with size and ranged from 0.6 to 1.2 meters per day. Granulometric analysis showed a systematic change in mean grain size and sorting along the beach pad.The presence of beach pads affected wave height and breaker angle which varied along the pad. Grain motion studies showed that sand could be added to the pad, travel through the pad along the foreshore or travel along the bar to the offshore. It was concluded that because of their size, their ability to migrate and the movement of sand through each pad that they play an important role in sand transport. Because they are built and migrate under oblique wave attack, beach pads are an excellent indication of a (momentarily) unidirectional littoral drift system. Beach pads migrate due to their inability to completely adjust to a wide variety of breaker angles.
Purpose:
The purpose of this data layer is to create a digital version of the sedimentary characteristics published by Entsminger (1978) for inclusion in the usSEABED data collection.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1978
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -85.4153
East_Bounding_Coordinate: -85.412
North_Bounding_Coordinate: 29.8028
South_Bounding_Coordinate: 29.7941
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: sediments
Theme_Keyword: sediment characteristics
Theme_Keyword: facies
Theme_Keyword: facies distributions
Theme_Keyword: beach pads
Theme_Keyword: beach cusps
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Gulf of Mexico
Place_Keyword: Florida
Place_Keyword: St. Joseph Peninsula
Access_Constraints: None
Use_Constraints:
None except that acknowledgement must be made in publications and reports of (i) the original data source, and (ii) the data integration by USGS and dbSEABED project at the University of Colorado.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Chris Jenkins
Contact_Organization:
Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder
Contact_Address:
Address_Type: mailing and physical address
Address: 1560 30th Street
Address: Campus Box 450
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0450
Country: USA
Contact_Voice_Telephone: (303) 492-6387
Contact_Facsimile_Telephone: (303) 492-6388
Contact_Electronic_Mail_Address: chris.jenkins@colorado.edu
Browse_Graphic:
Browse_Graphic_File_Name: Entsminger1978.jpg
Browse_Graphic_File_Description: Image showing geographic extent of data layer coverage
Data_Set_Credit:
Please review the cross reference information for the original data set credit to Entsminger (1978), and Chris Jenkins for digitizing samples locations and entering the data from the source report.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 8.3.0.800
Cross_Reference:
Citation_Information:
Originator: Lee D. Entsminger
Publication_Date: 1978
Title: Beach Pads & Beach Cusps, St. Joseph Peninsula
Edition: 1.0
Publication_Information:
Publication_Place: Tallahassee, Forida
Publisher: Forida State University
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: All attributes were entered and checked in a consistent manner.
Logical_Consistency_Report:
No additional check for topological consistency were performed on this data.
Completeness_Report:
Sedimentary descriptions and locations are provided for 20 samples.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: Navigational accuracy is unknown.
Lineage:
Process_Step:
Process_Description:
Digital data were hand formatted into dbSEABED data entry structure, then filtered and data-mined through dbSEABED software (version: db9_MNEx.bas)
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Chris Jenkins
Contact_Organization:
Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder
Contact_Address:
Address_Type: mailing and physical address
Address: 1560 30th Street
Address: Campus Box 450
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0450
Country: USA
Contact_Voice_Telephone: (303) 492-6387
Contact_Facsimile_Telephone: (303) 492-6388
Contact_Electronic_Mail_Address: chris.jenkins@colorado.edu
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 20
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0000
Longitude_Resolution: 0.0000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698
Distribution_Information:
Resource_Description: Entsminger, 1978
Distribution_Liability:
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.
Metadata_Reference_Information:
Metadata_Date: 20060322
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Brian J. Buczkowski
Contact_Position: Core Curator and Data Management Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2361
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: bbuczkowski@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.24 on Mon Mar 27 19:54:29 2006