Roxbury Conglomerate

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  • Info The Roxbury Conglomerate, also informally known as Roxbury puddingstone, is a name for a rock formation that forms the bedrock underlying most of Roxbury, Massachusetts, now part of the city of Boston.
  • The exterior of the church is primarily built of Roxbury Conglomerate commonly called puddingstone.
  • A number of processes have been proposed for the deposition of the Roxbury Conglomerate.
  • However, these three subdivisions of the Roxbury Conglomerate complexly interfinger with each other and lack the simple layer-cake distribution that past studies have described.
  • The Roxbury Conglomerate has been significantly altered by metamorphism.
  • The upper part of the Boston Bay Group consists of the Cambridge Argillite, which overlies the Roxbury Conglomerate.
  • Tectonism has also flattened, stretched, indented, and fractured the pebbles and associated matrix of the Roxbury Conglomerate to the point that it often has the appearance of flow structure.
  • Typically, tectonism has flattened, stretched, indented, and fractured the pebbles and associated matrix of the Roxbury Conglomerate to the point that it often has the appearance of flow structure.
  • The Brookline Member of the Roxbury Conglomerate is the classic 'puddingstone' that is typically discussed and illustrated in popular web pages, articles, and other publications.
  • The Roxbury Conglomerate, from which this pot is alleged to have come, has been dated as having accumulated between 570 and 593 million years ago and during the Ediacaran Period.
  • Past identification of a glaciogenic origin for the Roxbury Conglomerate was based entirely on the identification of 'dropstones' and striated pebbles, which have not been substantiated by later and more detailed research.
  • Initially, it was proposed that the Boston Basin was a nonmarine basin, in which river and mountain glaciers transported and deposited the sediments, which comprise the Roxbury Conglomerate.
  • Apparently, it was inferred from the locations of the two pieces of this pot among the explosion debris that this pot had been blasted from solid puddingstone (conglomerate), which is part of the Roxbury Conglomerate, from about 15 feet below the surface of Meeting House Hill.
  • To the south, the Roxbury Conglomerate unconformably overlies Mattapan Volcanic Complex, which, in turn, overlies the Dedham Granite.
  • The Roxbury puddingstone is a massive, Ediacaran, clast-supported pebble and cobble conglomerate that occurs within the Brookline Member of the Roxbury Conglomerate that is exposed around Boston, Massachusetts region.