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Saugus Iron Works National Historic Site sits on the banks of the Saugus River in Saugus, about 18 km (12 miles) north of Boston in southern Essex County, Massachusetts. Established on April 5, 1968, its roughly 3 hectares (9 acres) preserve the reconstructed site of the Hammersmith, the first fully integrated iron-making site in North America.
The Geologic Resources Inventory report for Saugus Iron Works. Image from the National Park Service's Geodiversity Atlas page on Saugus Iron Works.
The Hammersmith
| Operated | 1646–1668, on the Saugus River |
| Importance | Supplied vital iron goods to colonial America, trained skilled ironworkers and marked a key step in the growth of the American economy |
| Afterward | Much of the land was farmed, until preservationist Wallace Nutting and the First Iron Works Association restored much of the site |
| Today | A reconstructed blast furnace, forge, and rolling and slitting mill (a watermill that made iron rods), plus later buildings: the Iron Works House, a museum and a blacksmith shop |
Geologic setting
The site's bedrock is ancient Neoproterozoic igneous rock of the Avalon terrane — one of several foreign landmasses that attached to the eastern edge of proto-North America (Laurentia) during the Paleozoic. The Avalon terrane has a long, complicated history of deformation, igneous intrusion and sedimentation, leaving a varied mix of rock types in and around the site.
- Lynn Volcanics — the main bedrock: rhyolite flows, welded ash flows, tuffs and breccias.
- Unnamed Proterozoic granitoid rocks — beneath the site's northwesternmost corner, north of the Iron Works House and visitor center.
The site lies in the New England physiographic province and shares its geologic history with the wider region.
Geologic map of Saugus Iron Works, from the Geologic Resources Inventory. Image from the National Park Service's Geodiversity Atlas page on Saugus Iron Works.
Maps and reports from the Park Service's Geologic Resources Inventory for the site are available through the NPS DataStore.
Sources
Based on "NPS Geodiversity Atlas—Saugus Iron Works National Historic Site, Massachusetts," National Park Service, which cites Thornberry-Ehrlich (2015), Bell (1977) and National Park Service (2019); a work of the United States government in the public domain.
Licenza: CC0 1.0 (pubblico dominio) · Tratto da www.nps.gov
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