- Massachusetts (/ˌmæsəˈtʃuːsɪts/ MASS-ə-CHOO-sits, /-zɪts/ -zits; Massachusett: Muhsachuweesut [məhswatʃəwiːsət]), officially the Commonwealth of Massachusetts, is a state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and Gulf of Maine to its east, Connecticut and Rhode Island to its south, New Hampshire and Vermont to its north, and New York to its west. Massachusetts is the sixth smallest state by land area, but with over 7 million residents, it is the most populous state in New England, the 15th most populous in the country, and the third most densely populated, after New Jersey and Rhode Island. The state’s capital and most populous city, as well as its cultural and financial center, is Boston. Massachusetts is also home to the urban core of Greater Boston, the largest metropolitan area in New England and a region profoundly influential upon American history, academia, and the research economy. Originally dependent on agriculture, fishing, and trade, Massachusetts was transformed into a manufacturing center during the Industrial Revolution. During the 20th century, the state’s economy shifted from manufacturing to services, and in the 21st century it is a global leader in biotechnology, engineering, higher education, finance, and maritime trade.
- Limestone (Wikipedia)
Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life.
