Field Notebook: Vermont 1922
Page 15
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
St. Albans, Vt. July 4 - 1932. Tuesday Left Milton at 8.30 A.M. Today is cloudy but the Weather Man says Fair. Set to St. Albans at 12 noon. At one mile south west of Benicia, Vt., we saw a lot of Bracton conglomerate standing at a high angle. On one side are Highgate slate and below it Milton L. (Limestone) and the conglomerate in the Highgate slate (East) = Lower Cambrian muddy dolomite. What interested me most was along a strike to many Dilliston dolomite boulders many of which where from 5 to 8 feet long. In other places were other large pieces of the Dilliston dolomite, one block about 12 feet long by 6 feet thick. This Dilliston dol in boulders is commingled in the Bracton conglomerate and indicates proximity of the material in place at the time of deposition. At the above locality one can follow for ½ mile west the reappearance of the conglomerate over the Lower Cambrian and the Highgate shales. Because we are so near the former Dacotgan formation this may be reason why there is or mound of the Dilliston dolomite. The conglomerates in the upper part of the Lower Cambrian however here have the usual small angular pebbles. Today we saw one block over 2 feet long and another about 10 miles square. All are angular. These big pieces are not intraformational. They are foreign to the accumulation.