Country:
|
USA
|
Province:
|
Arkansas, Searcy Co.
|
Locality:
|
Marshall, 1 ml SE of
|
Layer:
|
Fayetteville Fm., lower shale |
Lower Boundary:
|
UAR basal--lower shale of Fayetteville, 327 million years
|
Upper Boundary:
|
UAR lower shale--Wedington/Fayetteville, 326.4 million years
|
Georeference:
|
|