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University of California Publications in Geology [Vol. 9 



ered. In going north along the west bank of Eel River a con- 

 siderable thickness of gray sandstone stained brown and greenish 

 brown is met with. Farther north, at the mouth of Price Creek, 

 a massive gray sandstone occurs. In lithologic character and 

 thickness this member resembles very closely the massive gray 

 member found in the upper portion of the Ferndale section. The 

 uppermost strata of this section, along the west bank, have been 

 removed by the river in forming the terrace on which the town 

 of Grizzly Bluff is now situated. Fortunately, however, it is con- 

 tinued along the east bank north of Alton. Here the conglomer- 

 ate outcrops and continues north toward Rohnerville. The top 

 of the section, as at Ferndale, is composed of brown sand and 

 gravel. 



Scotia Section. — On the west bank of Eel River, near the mouth 

 of Monument Creek, the Mesozoic rocks outcrop in a large mass 

 just above the wagon road. The strike of this formation is due 

 west with a south dip of seventy degrees. A short distance to 

 the north a reddish-brown shale is exposed, having a strike of 

 N 70° E, and dipping to the north at an angle of forty-five degrees. 

 In continuing north the shale gradually changes to a lighter color 

 and to a more sandy character. The strike also changes N 70° W. 

 Several localities gave the same results and it seems probable 

 that the attitude taken in the reddish-brown shale was measured 

 in strata that had been slightly dislocated. 



West of Scotia the light-brown shaly material is replaced by 

 a massive light-brown sandstone. This member continues north 

 for several hundred feet, where it gradually grades into brown 

 shale and finally into a blue-gray argillaceous sandstone and clay. 

 Beyond this point the section is not continued along the west 

 side of the river, but is most remarkably exposed along the east 

 side. Here the blue-gray sandstone and clay are followed by a 

 brown and greenish-gray sandstone which contains a fauna some- 

 what similar to that found near the top of the upper Neocene 

 at the mouth of Bear River, and also in the Alton section at a 

 corresponding horizon. Blue and gray sandstones of considerable 

 thickness are found next above the brown and greenish-gray 

 material. In general, this member is composed of soft strata, but 

 in some localities it has sufficient stability to form almost perpen- 

 dicular cliffs three or four hundred feet in height. These cliffs 

 are often referred to as the Scotia Bluffs. In this portion of the 



