532 REPORT UNITED STATES GEOLOGICAL SURVEY. 



Meridian Ridge. It is a small, alkaline stream. Cutting' across the 

 ridge in a comparatively deep canon, it flows to the eastward near the 

 top of the plateau extending southward from the Fontenelle. The sur- 

 face here is rather barren, gravelly, and sage-covered, even along the 

 course of the creek. To the southward buttes of Bridger beds, dark gray 

 and blackish in color, are noted from Slate Creek. They also outcrop to 

 a limited extent on the east and northeast side of the Green. The Green 

 below the Fontenelle turns from its southerly course to flow toward the 

 southeast. The following section was made in the bluffs between the 

 two creeks : 



Section No. 4. 

 Top. 

 5. Yellowish and ■white laminated sandstones with a few bands of con- 

 cretionary limestone with oolitic streaks. Very irregular layers of. 

 sandstones show in places ; the thickness of these beds is about . . . 100 feet. 



4. Thin, fissile, white shales with bands of sandstone 100 feet. 



3. Deep yellow sandstones somewhat massive 50 to 100 feet. 



2. Greenish and whitish shales, with bands of sandstone 50 feet. 



1. Rather massive yellow sandstones 200 feet. 



500 to 550 feet. 



The thicknesses in this section were estimated. The lower layer (No. 

 1) often thins out, and the sandstones become laminated. They appear 

 to lie just above the variegated beds. From the mouth of Slate Creek 

 down, the river bottom on the Green is broad, and covered with good 

 grass, and cottonwood groves. On the terraces back from the river 

 sage-brush is abundant. 



Hani's Fork. — Only the upper portion of this stream falls within the 

 limits of our district, but the stream was followed from its mouth. 

 About 25 miles from its mouth it is within our district, flowing approxi- 

 mately eastward along our south line. The bluffs on either side of the 

 stream from Granger northward are composed of the sombre colored 

 clays and sands of the Bridger Group, weathering into the bad-lands so 

 characteristic of that group. A short distance below the limit of our 

 district the following section was made in a bluff on the north side of 

 the stream : 



Section _A r o. 5. 



Base. 



1. White shales and gray colored sandstones forming bluffs 300 feet. 



2. Yellowish shales and coarse gray sandstones 100 feet. 



3. Gray sands and marls with greenish tint and having bands of limestone 



and sandstone. These beds weather into " bad-lands " 175 feet. 



4. Sandstones and greenish shales with bands of impure limestone near the 



top. These beds contain quantities of Unio Haydeni, and fragments of 



what appear to be fossilized branches, some resembling equisvtum 100 feet. 



675 feet. 



Above this section are sombre beds in which vertebrate remains are 

 found. The lower part of the section should probably be referred to the 

 Green River Group, while the upper beds are probably of Bridger age. 

 Still farther up the river lower beds appear, and the canon walls are 

 formed by coarse gray sandstones, with yellow sandstones and greenish 

 shales. North of Ham's Fork these beds form a bluff line facing Oyster 

 Ridge. This will be considered again farther on. 



Ham's Fork is the largest of the western tributaries of the Green 

 lying within our district. In the early spring it is not fordable on 

 account of the high water, and the fords are always difficult on account 

 of the miry character of the river-bottom. 



