magma gray to light gray (slate) porphyry). The gabbro along the creek presents a very pretty speckled appearance. [sketch] slate valley porphyry gabbro. zery 100 yds. (1) porphyry baked slate [^^] gabbro. [sketch] (2) 275 yds. [sketch] (3) the slate continues nearly to the river at the south end of B. 34° in a continuous mass. For a hundred yards or more north of the river there is a few series of slaty shales striking N. 66° E. and dipping at low or gentle angles, 14°-20°, 3.25°E., these shales for the lower 18ft. are very baddled v fossils with no apparent slaty cleavage unless the slaty cleavage be regarded as a thick red with the bedding. The upper 30 or 40 ft. consist of a jumble series of alter- nations of a thin 1 incl. to rarely 2 inel white limestone seam with about a foot of slaty slate. The limestone seems show the true bedding but slaty cleavage is developed to an extreme in the shale as illustrated in figure 3 page 18. Were it not for the calcare- ous seams these beds would appear to dip at a very high angle, 45°-60° instead of only, 14°-20° (3.25 E.), not only did the shales metamorphosed to slate but the calcareous seams are coarsely crystalline & seem to show an in- cipient cone-in-cone structure (quartz dep. with spar). One of the calcreod seams is composed of the indurated beds of Beyrichia's [sketch] (of B. symmetric) with a few Lepidoceras which also occurs in the shales. These fossils are 6.34° 3a . No limbrelevels nor Lingulae. Another patch of baked → slate which is hardly at all slaty occurs a few rods to the north and is entirely enclosed above below & on both sides by the gabbro. This patch of slate yielded no fossils. strike N. 45° E. strike N. 70° E. dip S. 20° dip 15° directly to S. 45° E. S. 20 E. with regard to relations it may be 19