THE GALLATIN MOUNTAINS. 



Number. 

 33 



Crowfoot Ridge section. 



Feet. 



31 



30 



655 

 380 



28 

 27 



26 



25 



24 



-23 

 22 



21 



20 



Quadrant quartzite. Sandstone and quartzite, saccharoidal in texture, reddish near 

 the base, with dark-gray and very calcareous layers; passes at top to a white sand- 

 stone 200 



d. Limestone, light gray, brecciated and broken; in places iron stained 100 



c. Limestone, light gray, varied with brown bands or fine stripes and lines; contains 



chert, and is in places brecciated, the fragments being cemented by calcite 400 



b. Limestone; crystalline, very light gray, weathering creamy white; contains 



white chert in bands and nodules _ 30 



a. Limestone, crystalline, dark brownish gray, intersected with calcite seams. 



Chert bands and nodules are abundant .■ 125 



Limestone, light gray and gray, weathering gray; banded with brown; banded appear 

 ance on weathered surface ; finely crystalline. Fossils abundant 



b. Limestone, crystalline, massive, light gray, with small brownish fossil fragments scat- 

 tered through it. The upper 10 feet is a conglomerate of red, often cellular lime- 

 stone. Fossils 40 



a. Limestone, massive, light gray, similar to No. 28 15 



55 



Limestone, light gray and brown, very finely crystalline or granular; well bedded, 



with layers 10 to 20 feet thick of brown or cream-colored limestone. Certain layers 



are banded with light- colored chert, weathering buff or brown; these layers carry 



corals and fossil shells 85 



Limestone, crystalline, light gray, generally massive, but in places more thinly bedded, 

 and striped with brown. The rock is often magnesian and impure. Fossils 200 



Limestone, dark gray and buff, very argillaceous, thick and thinly bedded. Fossils 

 from the upper portion and the lower portion of these beds are Lower Carboniferous. 

 This limestone is very much like the bed beneath it 50 



b. Limestone, more massively bedded than the underlying bed and coarser in crystal- 



lization ; a quite pure limestone, full of fossil fragments 15 



a. Limestone, fissile and thinly bedded, impure and argillaceous. The fossils occur 



in lower and upper beds 60 





I 



Limestone, coarsely crystalline, dark gray, somewhat variable; a little cherty; fossil- 

 iferous 



Limestone, cherty; at base very finely crystalline; occurs in massive layers and is 

 pinkish gray. Higher up the beds are cherty, and the upper portion contains many 

 crinoid stems and a few indistinct corals and shells. Weathers red, and is cracked 

 and brecciated 



Limestone, buff aud red, fissile, near base passing into a more thickly bedded limestone. 

 The rock is a dense, compact, light limestone, argillaceous and siliceous 



Limestone, crystalline, dense, compact; the upper 20 feet is red and cracked; the beds 

 beneath are massive, with toothed junction surfaces. Rock is decidedly magnesian.. 



Limestone, in alternating beds of thin aud fissile buff and massive gray limestones, 

 the beds 15 to 20 feet thick, and the limestone much cracked This limestone is 

 impure, argillaceous, and in some beds quite arenaceous 



b. Limestone, crystalline, dark gray, thick and thinly bedded, with fetid odor, and 



containing gasteropod shells. The limestone is quite pure 15 



a. Limestone, crystalline, brown, crackled, with fetid odor. Slightly arenaceous; 



granular 10 



75 



80 



60 

 30 

 50 



100 

 25 



