umber, I believe was an alluvium. I think that there were two reef heads which filled the area between them by debris from central beds. The nearly flat upper surface with 2 or 3 foot or more beds extending many the whole length of the section would further suggest this. The collection of specimens (7/5/57/10) I believe indicate slightly less turbid water (deeper?) giving these smaller smaller shell frags a chance to accumulate in well folded strata. Pictures 4 & 5 of the area of the smaller gap tank and also of the slumped #2 gaps. Pictures 6 & 7 are of the lower part of the section we found in the fields project. July 4, 1957 - Monday ... Marathon! 21 7/5/57 Sect. 21 Section VI - about halfway between section IV & V. 1) LS, gray, massive in 3 to 5' beds, conglomeratic on the upper surface, but only slightly. Base of unit not observed. 2) Covered 6' - stream bed. 3) LS, yellow-brown weathering, organic frag (crinoid, furculinae), muddy quartz sand on upper surface, well rounded, but not frosted, 2', upper surf as flat. 7/5/57/1 4) Covered 16' - probably a shale cutival with at least one perhaps one nodular ls rubble beds. 5) LS, yellow-brown weathering, gray frag, organic frag (furculinae, crinoid), replace quartz in geodes, quartz sand upper surface. The quartz sand seems to have been washed across the ls and some quartz stuck to the ls surface - furculinae are bedded in this 5s layer. 1'