| Fernvale Limestone | |
| Type: | Formation |
| Age: | Ordovician |
| Prilithology: | Limestone |
| Namedby: | Charles Willard Hayes and Edward Oscar Ulrich[1] |
| Region: | Arkansas, Tennessee |
| Country: | United States |
| Underlies: | Cason Shale |
| Overlies: | Kimmswick Limestone |
| Thickness: | 0 to 100+ feet in Arkansas[2] |
The Fernvale Limestone is a geologic formation in Alabama, Arkansas, Illinois, Missouri,Oklahoma, and Tennessee.[2] It preserves fossils dating back to the Ordovician period.
L. cooperi[3]
L. oblongus[3]
A. unicostatus[4]
A. alveolaris[4]
A. triangularis[4]
A. ordovicica[4]
A. polita[4]
B. compressa[4]
B. inclinata[4]
B. ornata[4]
B. penna[4]
B. profunda[4]
C. delicatus[4]
C. flexuosus[4]
D. brevis[4]
D. scotti[4]
D. typica[4]
D. falcatus[4]
D. homocurvatus[4]
D. suberectus[4]
E. delicata[4]
I. superba[4]
K. gracilis[4]
O. abundans[4]
O. inclinatus[4]
O. parallelus[4]
O. venustus[4]
O. inclinata[4]
O. tenuis[4]
P. trigonius[4]
P. compressus[4]
P. ellisoni[4]
P. fornicalis[4]
P. gracilis[4]
P. homosimilaris[4]
P. panderi[4]
P. simplex[4]
P. sulcatus[4]
P. undatus[4]
P. furcata[4]
R. divaricatus[4]
R. typicus[4]
S. robustus[4]
S. insculptus[4]
T. exacta[4]
T. diminuta[4]
T. tenuis[4]
Z. curvata[4]
Z. mira[4]