on sandstone with trg cql. - or on clayey ss, siltst, & claystone of light gray to whitish color with Fe concent. and fairly persistent accumulations of spherulite molds. Morrison contact - Nowhere in Maycworth- Middle Fork once is there a clearest break. The Sparkly overlies lignitic, kentonic, gray-black claystone which grades to greenish gray thence to green and purple without obvious break. In proceeding section limestone first occurs only about 37' beneath base of Sparkly - elsewhere in Middle Fork once highest calc. beds more than 80' beneath in purplish cltn. Apparently no consistent level calc beds to appear. Nor is the thickness of black or dark gray claystone beneath Sparkly consistent - though this criterion seems more useful map limit if one has to be drawn. 72