Dear Ms. Lunsford,
Thank you for posting your request on History Hub!
The Federal government does not ordinarily create or maintain birth, death, marriage, divorce, adoption, or burial records. Such records are made and kept by state and local governments rather than the National Archives.
We suggest that you search Texas Death Index, 1903-2000 and review the Texas Vital Records website for more information on requesting a search for your great aunt. You may also wish to contact the Nolan County Clerk's Office, which has an application to search county death records. In addition, the FamilySearch Research wikis for Nolan County, Texas Genealogy
We hope this information his helpful in your research.
The National Archives and Records Administration