An exposure occurs in the road 1.30 S.E. of the R.R. at 135 A.T. on 1, 20, 7. The rock is of light color & fragmental, all, hard & either a tuff or flow breccia. Too obscure to determine which. A similar exposure occurs western the road in front of Mr. Robinson's ~ 1.40.3 But both the S.W. & South of Mr. Robinson for a couple of hundred yards occur good ex- posures of flow breccia similar to 1, 30, 2. (l) Fragmental beds occurs in the hill in 1.41.1. The flow Breccia Type of matrix occurs only sparsely, (ni:e - matrix forming a net work about large fragments which are usually one 2 miles x flow lined & this network stands out more high above the fragments, the latter being depressed).