Devonian Lithological Database - Age Reliability Codes
|
Code
|
Description
|
|---|---|
|
A-E
|
Range in confidence of age report: A best, E worst |
|
G
|
No age was reported, but an age was inferred |
|
1
|
Reported age based on biostratigraphy |
|
2
|
Reported age based on superposition and correlation |
|
3
|
Reported age based on radiometric dates |
|
4
|
Method for age determination unreported |