Table 1.

Relative stratigraphic positions of localities sampled in this study, located relative to sandstones as mapped and numbered by Hentz (1988)

Archer City Fm

Sandstone 8

T-Kola Switch (Clay County)

Markley Fm

Sandstone 14

S-Malone

Sandstone 12

Q-US 281 Roadcut (Jack County)

Sandstone 11

N- North of Markley (Young County)

O-Maxey Ranch (Jack County)

P-Voyles (Jack County)

Sandstone 10

B-Loving (Young County)

D-Cooper (Jack County)

E-Williamson Drive (Jack County)

F-Bloodworth (Jack County)

H-Squaw Mountain Coal Mine (Jack County)

I-Gas Well (Jack County)

J-Gillespie Ranch (Jack County)

K-Lycopod B (Young County)

M-Walker (Jack County)

Sandstone 9

L-Scott (Montague County)

Sandstone 8

R-Turnbow (Montague County)

Sandstone 6

C-Brannon Mine (Jack County)

G-Squaw Mountain Road Cut (Jack County)

Harpersville Fm

Sandstone 5

A-Coal Mountain