Espanola Basin    | 
|---|
 | RT | New Mexico |  |   | Rio Grande Rift |  | SN | N New Mexico. Indexed with counties or region as applicable. Added to Thesaurus in 1985. |  
 ESR    | 
|---|
 | SN | Not a valid term for GeoRef. For electron spin resonance, see electron paramagnetic resonance or EPR spectra. |  
 estimation    | 
|---|
 | SN | Used as a general term through 1977. After 1977, see evaluation for economic studies. |  
 estone#Barnwell Formation#Blue Ridge Mountains#Blue Ridge Province#Blufftown For    | 
|---|
 
 Estrada Nova Formatio    | 
|---|
 
 estuarine    | 
|---|
 | SN | A valid term through 1977. After 1977, use estuaries or (as of 1981) estuarine environment or estuarine sedimentation. |  
  |