|OLG and DCRT
2014-15 through 2018-19
The Atchafalaya Heritage Area has been designated by Congress as a National Heritage Area.
|How To Use Database||Citing Dates||Radiocarbon Database|
back to top
The Louisiana radiocarbon database that you will be searching today is based on the original Louisiana radiocarbon database published in 2001 (McGimsey and Van der Koogh) and has been updated to include published radiocarbon dates from December 1999 onward. One of the goals of the database, in addition to making the information more accessible to the public, is to keep the information as up-to-date as possible. As new cultural resource management reports that contain radiocarbon dates are added to our library, the dates will be entered into the database. In some cases, dates may be published in other venues such as newsletters, journals and dissertations that would not necessarily be sent to our office. In rare cases, the dates may have never been published. It is our hope that researches will share their radiocarbon dates with us via email. This form can also be used for reporting errors you may find in the database, providing additional information about a date (such as the correction factor that may not have been provided in the published reference) or recalibration of dates.
A few changes have been made to the original database, notably the database is now offered online and is searchable using the following fields: site name, site number, LA Division of Archaeology report number, lab number, date BP (before present), and date range BP. Fields from the original database that have been maintained are material, provenience, measured radiocarbon age, C12/C13 (now headed as correction factor), conventional radiocarbon age (CRA) BP, Calibrated (Cal) median B.C. /A.D., Calibrated (Cal) BP, Calibrated 2 sigma range (BP), cultural component, and comments. Fields added to the database are the LA report number, calibration reference (if known), and references (all known references on a date not just the primary reference). For ease of use and for those who may not be familiar with radiocarbon dating a brief description of each of these terms follows:
How to Use the Louisiana Radiocarbon Database
back to top
The website offers five basic ways to search the database. You can search records by site number, site name, lab number, LA report number or by specific date (BP) or date range (BP). If you do not know the entire site name or lab number, etc., the search function will operate with a partial field entry. The database can also be searched for a specific date or date range. It is important to remember that all dates entered must be in BP years and that the dates that will be queried are the conventional radiocarbon age (CRA) which will include the +/- year range. Date or date range searches may also be restricted to a specific parish. The decision not to include a calibrated date search was based on the fact that the calibrated dates are subject to change depending on the calibration program used and the continual improvements in the calibration curve.
The results window will display the following fields: site name, site number; lab number; conventional radiocarbon age; LA report number; and view. All search results can be sorted by site name, site number, lab number, conventional radiocarbon age, or LA report number. By clicking the view button, a full display of all the record for a specific date will appear. There will be blank fields. If there is no information within a field it means that we were not able to obtain that information from the publication(s). We hope that there are no errors in the reporting the dates but unfortunately this is never the case. If you come across an error please let us know.
Citing Dates Presented in this Database
back to top
When referencing a date from this database use the references provided for the individual dates and not the database. We suggest when referencing radiocarbon dates that you use the Society of American Archaeology guidelines (section 3.3.5 Radiometric Ages and Dates). http://www.saa.org/AbouttheSociety/Publications/StyleGuide/tabid/984/Default.aspx
back to top
If you require more information, have comments regarding the radiocarbon database or have a more specific query that cannot be performed by the online version, please contact the Louisiana Division of Archaeology at 225-342-8170.
back to top
Copies of this publication can be obtained through the Louisiana Archaeological Society website