-140- Section 6 contd. Thickness (feet) upper surface with 1 inch silicified band, well sorted in upper 2 inches . . . . . . . 9 10. Covered . . . . . . . . . . . . . . . . . . 3 9. Calcarenite, gray weathering, in 1/2 foot beds, well sorted separated by brown weathering siltstone . . . . . . . . . . 3 8. Siltstone, and sandstone, like unit 4. . . . 6 7. Calcarenite, like unit 5 . . . . . . . . . . 1 1/2 6. Siltstone and sandstone, like unit 4. . . . 5 5. Calcarenite, gray weathering, chert pebbles up to 1 inch in diameter, unit thins to NE and thickens to SW . . . . . . . . . . . 1 4. Siltstone, orange-brown weathering, fine sandstone brown weathering, well cemented with secondary chert . . . . . . . . . . 11 3. Covered . . . . . . . . . . . . . . . . . . 4 2. Calcarenite, medium gray weathering; minor amounts of fine chert pebbles which occur in thin beds near base, matrix is mostly sand size, upper 40 feet well sorted, beds 1 to 4 feet thick, dip 10° N 70° W . . . . . . . . . . . . 52 Lenoxhills Formation 1. Conglomerate, pebbles and cobbles from Santiago chert and later Paleozoic forma-