Iron Hill (Delaware)
| Iron Hill | |
|---|---|
 Iron Hill
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| Highest point | |
| Elevation | 328 ft (100 m) |
| Coordinates | 39°38′19″N 75°45′06″W / 39.6387°N 75.7518°WCoordinates: 39°38′19″N 75°45′06″W / 39.6387°N 75.7518°W |
| Geography | |
| Location | Newark, Delaware |
Iron Hill is a prominent geographical feature in the vicinity of Newark, Delaware, in the United States. With a peak elevation of 328 feet (100 m) it is the highest hill in Delaware, though not the state's highest point as the Piedmont plateau region near Centreville reaches a higher elevation of 448 feet (137 m) at Ebright Azimuth. The hill is named for its iron deposits, which were mined over a 200-year period during the 18th and 19th centuries. Iron Hill is part of a New Castle County park known as Iron Hill Park.
Iron Hill is located just south of Newark in Pencader Hundred, with the summit lying south of Interstate 95 and west of Delaware Route 896. It is the easternmost and highest of three geologically similar peaks, together with neighboring Chestnut Hill and Gray's Hill (across the border in Maryland).
Iron Hill and the two neighboring hills are outlying Piedmont outcroppings, east of the fall line and surrounded by the relatively flat Atlantic coastal plain. The hills are igneous intrusions of "Iron Hill Gabbro", a coarse and dark-colored rock composed mainly of plagioclase, pyroxenes, and olivine. The rock contains significant iron oxide deposits in the form of hematite, goethite, and limonite, forming the basis for historical iron mining activity.Jasper is also present and was used for toolmaking by prehistoric inhabitants of the area.
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