Pg. 21, 45, 49-51. Ashland shales. In Ashland village, along road opposite the [Ashland] hotel, and southward toward Massardis, are several outcrops of limestones, calcareous shales, and sandstones, which present stratigraphic relationship to one another, but on account of shear planes and semilated structure, as well as intervals unexposed, some doubt must be held regarding accuracy of interpretation. The irregular, block-like masses of limestone opposite the hotel are met on south side by yellowish, weathered shales. There is an interval of several hundred feet showing no rock exposures. On east side of road there is a rock cut about 400 feet south of hotel. The rocks in this exposure are calcareous, thin-bedded shales, somewhat nodular and weathering yellowish from iron oxide. Some layers contain nearly pure argillaceous shales, others are calcareous. The calcareous layers are all somewhat arenaceous, showing pebbles of quartz, jaspers, and siliceous slates, mingled with broken calcareous shells, and a approach to the conditions of Sheridan sandstone. Writer's interpretation, with his present knowledge of facts, is that the shales are older than the limestones, and that Sheridan sandstones are of same age as [or older, p. 21] the shales. Fauna correlated with Niagara of New York. Regarded as younger than Aroostook limestone.

Source: US geologic names lexicon (USGS Bull. 896, p. 80).

Pg. 170-172, 173-174; 1940 [abs.], GSA Bull., v. 51, no. 12, pt. 2, p. 1978-1979. †Ashland shale included in Ashland formation (new). [See entry under Ashland formation.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 152).