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The Newbury Volcanic Complex, also known as the Newbury Formation or Newbury Volcanics, is a 16 km long, 3 km wide strip of volcanic materials and sediments in northeastern Massachusetts. The complex is made up of ten stratified members and is estimated to be between 3770 m 4400 m in thickness. Due to the fossils that have been found in this formation and with the help of radiometric dating, the Newbury Volcanic Complex has been determined to be Silurian in age, which provides useful information for interpreting the effects of the Acadian orogeny on the New England area.
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