Roxbury conglomerate, also known as Roxbury puddingstone, is a puddingstone

Puddingstone (rock)

Puddingstone, also known as either Pudding stone or Plum-pudding stone, is a popular name applied to a conglomerate that consists of distinctly rounded pebbles whose colors contrast sharply with the color of the finer-grained, often sandy, matrix or cement surrounding them...

 or conglomerate stone

Conglomerate (geology)

A conglomerate is a rock consisting of individual clasts within a finer-grained matrix that have become cemented together. Conglomerates are sedimentary rocks consisting of rounded fragments and are thus differentiated from breccias, which consist of angular clasts...

 that forms the bedrock underlying most of Roxbury, Massachusetts

Roxbury, Massachusetts

Roxbury is a dissolved municipality and current neighborhood of Boston, Massachusetts, United States. It was one of the first towns founded in the Massachusetts Bay Colony in 1630, and became a city in 1846 until annexed to Boston on January 5, 1868...

, now part of the city of Boston. The bedrock formation extends well beyond the limits of Roxbury, underlying part or all of Quincy

Quincy, Massachusetts

Quincy is a city in Norfolk County, Massachusetts, United States. Its nicknames are "City of Presidents", "City of Legends", and "Birthplace of the American Dream". As a major part of Metropolitan Boston, Quincy is a member of Boston's Inner Core Committee for the Metropolitan Area Planning Council...

, Canton

Canton, Massachusetts

Canton is a town in Norfolk County, Massachusetts, United States. The population was 21,561 at the 2010 census. Canton is part of Greater Boston, about 15 miles southwest of downtown Boston.- History :...

, Milton

Milton, Massachusetts

Milton is a town in Norfolk County, Massachusetts, United States and part of the Greater Boston area. The population was 27,003 at the 2010 census. Milton is the birthplace of former U.S. President George H. W. Bush and architect Buckminster Fuller. Milton also has the highest percentage of...

, Dorchester

Dorchester, Massachusetts

Dorchester is a dissolved municipality and current neighborhood of Boston, Massachusetts, United States. It is named after the town of Dorchester in the English county of Dorset, from which Puritans emigrated and is today endearingly nicknamed "Dot" by its residents. Dorchester, including a large...

, Dedham

Dedham, Massachusetts

Dedham is a town in and the county seat of Norfolk County, Massachusetts, United States. The population was 24,729 at the 2010 census. It is located on Boston's southwest border. On the northwest it is bordered by Needham, on the southwest by Westwood and on the southeast by...

, Jamaica Plain

Jamaica Plain, Massachusetts

Jamaica Plain is a historic neighborhood of in Boston, Massachusetts. Founded by Boston Puritans seeking farm land to the south, it was originally part of the city of Roxbury...

, Brighton, Brookline

Brookline, Massachusetts

Brookline is a town in Norfolk County, Massachusetts, United States, which borders on the cities of Boston and Newton. As of the 2010 census, the population of the town was 58,732.-Etymology:...

, Newton

Newton, Massachusetts

Newton is a city in Middlesex County, Massachusetts, United States bordered to the east by Boston. According to the 2010 U.S. Census, the population of Newton was 85,146, making it the eleventh largest city in the state.-Villages:...

, Needham

Needham, Massachusetts

Needham is a town in Norfolk County, Massachusetts, United States. A suburb of Boston, its population was 28,886 at the 2010 census.- History :...

, and Dover

Dover, Massachusetts

Dover is a town in Norfolk County, Massachusetts, United States. The population was 5,589 at the 2010 census.Located about southwest of downtown Boston, Dover is a residential town nestled on the south banks of the Charles River. Almost all of the residential zoning requires or larger...

. In the 19th and early 20th centuries it was frequently used to construct walls and house foundations in the Boston area; some of the stone was quarried in Brighton and Newton, but the most extensive workings were those in Roxbury.

Roxbury puddingstone is the official rock of Massachusetts

Massachusetts

The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

.

Puddingstone Park

Puddingstone Park

Puddingstone Park is a neighborhood park built as part of the redevelopment of the "ledge site", a former Puddingstone quarry near the corner of Huntington Avenue and Tremont Street, at the Green Line trolley stop of Brigham Circle, in the Mission Hill neighborhood of Boston, Massachusetts...

 is a neighborhood park built as part of the redevelopment of a former puddingstone quarry in the Mission Hill

Mission Hill, Boston, Massachusetts

Mission Hill is a 3/4 square mile neighborhood of Boston, with the population of approximately 18,000 people.The neighborhood is roughly bounded by Columbus Avenue and the Boston neighborhood of Roxbury to the east, Longwood Avenue to the northeast and the Olmsted designed Riverway/Jamaicaway and...

 neighborhood of Boston.

The American poet Oliver Wendell Holmes

Oliver Wendell Holmes, Sr.

Oliver Wendell Holmes, Sr. was an American physician, professor, lecturer, and author. Regarded by his peers as one of the best writers of the 19th century, he is considered a member of the Fireside Poets. His most famous prose works are the "Breakfast-Table" series, which began with The Autocrat...

, wrote a poem called "The Dorchester Giant" in 1830, and referred to this special kind of stone, "Roxbury puddingstone", also quarried in Dorchester, which was used to build churches in the Boston area, most notably the Central Congregational Church (later called the Church of the Covenant

Church of the Covenant (Boston)

The Church of the Covenant is a Boston, Massachusetts, landmark, built in 1865-1867 by the Central Congregational Church and now affiliated with the Presbyterian Church and the United Church of Christ.-History:Built of Roxbury puddingstone in Gothic Revival style it was one of the first churches...

) in Boston's Back Bay neighborhood.

External links

• MIT page on puddingstone
• City of Boston Open Space Plan 2002-2006: Maps (pdf). Page 1 shows bedrock geology, including the extent of the Roxbury Conglomerate within the Boston city limits.