No. 1621. LATE NIAGARAN STRATA—PATE AND BASSLER. 411 
CLIFTON, TENNESSEE. 
The section at Clifton is well exposed along the river bank, the low- 
est beds being shown north and south of the old cement mill, where a 
fault brings the Middle Ordovician Hermitage limestone in contact 
with the Dixon. Proceeding southward from this point, the Dixon 
and overlying formations are well exposed; northward along the river 
bank and then along the slope of the hill back of Clifton, the entire 
section can be nail. out in more or less detail. The Welle with 
its typical fauna, is well shown along the river bank about one-fourth 
of a mile south ali the cement mill and also in the town of Clifton 
itself. The following section is a combination of these several ex- 
posures. In this, as well as in the following sections, the strata are 
arranged under the formations and subdivisions recognized by us, 
and described more in detail on succeeding pages. 
Section at Clifton, Wayne County, Tennessee. 
Gravel beds. 
Silurian (Niagaran). 
10. Beech River formation. Feet. 
ce. Kucalyptocrinus zone. Dark blue shales with many cherty 
JAWS ~ INORSUIS Howry ee . 364 
b. Troostocrinus zone. Blue shales and limestones holding 
Troostocrinus and associated fossils and arranged as 
follows: 
Do ITNT WOKE: IBN ee a ee 11 
Ars Te ees el Cee eter hoe tana awn rar can 2h ete bir ek 42 
SOOM PACHPLIMESTOM Claw es hue en enh Seen ee 2 
Poy LESIONS) eee ci ee Dae eee Oe 18 
1. Compact limestone in tee ers varying from 1 to 6 
in cChessingehi Ck CSSrs as te EIS ET 5 
a. Cocecocrinus zone: 
5. Blue shales with thin beds of nodular cherty 
LETT ES COM Cie eee toes a er en eer eee ee ee Pinte Ite): 63 
4, Blue shales with four or more well defined chert 
bands 1 to 2 inches thick_________ tie Nees Ney oP 3 
3. Blue shales free from chert, irregularly developed_ 0-7 
2. Grayish white crinoidal limestone with a purplish 
tingelwhenstreshily, brokenss-= =) 2 22s 63 
1. Blue shales weathering white upon exposure_____ 2 
9. Dixon formation. 
Red shales and clayey limestones with occasional layers of 
white argillaceous limestones. Fistulipora hemispherica 
IRANI OVER PV ORUD ONG STi a este gee eck a I ae eee eee Se eee 44 
8. Lego limestone. 
-b. Compact gray limestone with layers of reddish, more 
DEC UL ACCOUSM ROCK eee met ake TA Nes oe a eS 144 
i, COMDACK, WHOS, TMACSe inven 2 = 314 
7 Waldron shale. 
White indurated clay and white argillaceous limestones 
with the typical Waldron fauna, among the species being 
