Country:
|
USA
|
Province:
|
Arkansas, Washington Co.
|
Locality:
|
Round Mountain (Sec.7, T15N, R30W)
|
Layer:
|
Brentwood Fm. |
Lower Boundary:
|
U Halian--Bloydian, Brentwood base, 313 million years
|
Upper Boundary:
|
UAR Brentwood Lst.--Woolsey, 312.5 million years
|
Georeference:
|
|