"lodo" 8-12" thick + 7/26/60 interbedded sh.& limest. calcareites 1" - 3" thick These beds are v. carbonaceous. Unit 3. - 9 1/2 ft. Rapidly passing late t shale. Mainly late, beds 2"-3". Top of unit marked by a re-entrant of weathered sh. & some late + 18 ins zone Coll. 6 at level of re-entrant. cryptolithus constellaria. Unit 4. - 10 ft thick Same as unit below again marked by shale re-entrant bt at top.