No. 1621. LATE NIAGARAN STRATA—PATE AND BASSLER. 413 
Section at Brownsport Furnace, Decatur County, Tennessee. 
Gravel beds. 
Devonian. Feet. 
Chattanooga shale (exposed along hillside northwest of furnace)__ — 
Silurian. 
' 3. Lobelville formation. 
Coral. zone. Yellow clays and argillaceous limestones hold- 
ing an abundant coral fauna. Contains numerous speci- 
mens of several species each of /avosites, Heliolites, Clado- 
pora, Cystiphyllum, Alveolites, and Thecia, and Amplexrus 
SOTHO NO ESI ELSI ER Ne aed NON TE IS puis he 20 
2. Bob formation. 
d. Somewhat massive argillaceous limestone with few fossils_ 15 
c. Blue clay and shales with many brachiopods. J/eristina 
maria-remeri, Dictyonella gibbosa, Gypidula  remeri, 
Merista tennesseensis, Uncinulus tennesseensis, and Wil- 
sonia saffordi, and a small form of Aftrypa reticularis 
MUTGOFORSS javecicularclhy glowing se ne 
b. Thin yellow argillaceous limestone alternating with shale__ 4 
a. Gray, rather massive limestone containing large examples 
of Uncinulus stricklandi_________ ORIISP= ue Pa eiwiraies Wie 4 
1. Beech River formation. 
ce. Huealyptocrinus zone ___~_____ pees paar 10 
b. Troostocrinus zone______—__ ae eA a ee 24 
a. Coceocrinus zone________- a ae 15 
Dixon formation. 
Red argillaceous limestones and shales, exposed at base of south- 
erngcladexe a= 2 s= pee see Pa EET EE ee Yl = 
DECATURVILLE, TENNESSEE. 
The following section is exposed within a radius of 1 mile of De- 
caturville, and although exposures are numerous, the section as a 
whole can be observed at no particular place. The lower part of the 
section is brought up by an immense uplift just east of Decaturville, 
while the upper formations may be found on the higher land about 
the town. At Decaturville itself the Decatur limestone is represented 
by bowlders only, but at Tuck’s Mill, 1 mile north of the town, 70 
feet of this limestone is present, and, furthermore, its unconformable 
position upon the Eucalyptocrinus zone of the Beech River formation 
is excellently shown. At this point, blasting by Mr. Pate in the 
upper part of the Kucalyptocrinus zone resulted in a large crinoid 
fauna. 
General section in the vicinity of Decaturville, Decatur County, Tennessee. 
Gravel beds. 
Devonian. Feet. 
Chattanooga shale __________ fee pets meen eermmrn ro civtan: 'h ty het! 0-10 
Hardin sandstone________ Sa ed Sea ee SENSE ee 0-4. 
(OIRTBNGIEIAN “NGG ee OR @ 44+ 
