8 cove and the strike may be seen to swing around to N 53° W, in an even curve. These dark blue shales underly cliff 50° N E, and underly an exposure of about 20 feet of very light gray tuffea composed of rhyolitic material and apparently the same as depose occurring on the northwest side of Horan Head. (As much and of the zone there is another fault bringing the same tuffea eastward along rift or more.) A trip was made to the east end of Horan Head to determine the nature of the rhyolite on the south side - whether intruded into the gabbro or the gabbro intruded into the rhyolite. The rhyolite here about 60 feet broad. The gabbro is coarse grained and uniform up to within 2 to 4 weeks of the contact this 2 to 4 foot irregular band is slightly demarcated from the rhyolite on the west end; the gabbro on the east. A specimen as 1262, is a dark fine grained rock but not quite so glassy as in usual for rhyolite. The rhyolite 1 foot from the contact is dark blue & glassy: 1263 25 feet from the contact the rhyolite lighter tblue or almost gray 1264. One foot further in the rhyolitic tuffea becomes grayish & coarser, and 10 pit still farther in the rhyolite, 1266 becomes pinkish. In this one foot land there are included rounded mattered fragments of a much darker apparently basic rock though fine grained. A specimen of the rhyolite with one of these fragments is 1263 B About a quarter of a mile due west of the north end of Federal Harbor there occur in the delta about 100 feet west of the highway a series of light redish gray blue acid tuffea and greenish grey sandstone beside the latter resembling those of Old Long Cove beds. The strata strike N 74° W, and dip approximately 35° N E. Several seams 1 inch to five inches thick in the tuffea are full of finely preserved casts which yield a rich fauna. S 641-7 A (the faunas also crop out above the boundary between 641-7 and 651-9. The fauna is exceedingly rich both in brachopoda & mollusca including camarotoechia (of Long Cove) abundant Chonetes denysi, abundant Dalmanella [Schonera? species] common Grammysia angulata var. occasional Actinoptercella 2 or 3 spp. common Pteronitella retroflexa occasional Goniophora 2 spp. (one of them G. rhomber type) Mollopso? platyphyllis occasional Ctenodonta 2 spp. occasional various lamellibranchs common Murchisonia 2 or 3 spp. common Cornulites rare Dalmanites for R Calymene for R 9 Perry asswity 6 N - Below the railroad, between the highway and creek over Little River, and just west of a wire fence there near on the north bank of Little River, see locality 38.