Description

There is little evidence for extensive serpentine vegetation here. Clyde Reed collected a few serpentine indicator grasses in the area. The exact location of any barrens is not clear.

Mining

A large quarry opened here in 1910 to produce crushed serpentine aggregate and operated until about 2007.

Description

Little is known of the history of these barrens, also known as the "Hebbville-Hollofield Barrens". Clyde Reed states that "this huge barren reaches south along the western edge of Baltimore County to U.S. Rt. 40 on the Patapsco River." They appear to have vanished due to the construction of I-70, suburbanization, and lack of disturbance. A small amount of serpentine vegetation may still exist on the slopes below the Hollofield Area overlook in Patapsco Valley State Park.

Description

Botanized by Clyde Reed. Never a grassland, but a damp serpentine woods.

Description

This barrens is known only from the 1988 Harford County habitat assessment study. It appears to have closed back up into serpentine woodland on current aerials. Its location is not entirely certain.

Visiting

Little Deer Creek Hill is on private property and should not be visited.

Description

This barrens is known only from the 1988 Harford County habitat assessment study. It appears to have closed back up into serpentine woodland on current aerials. Its location is not entirely certain.

Visiting

Old Jarrettsville is on private property and should not be visited.

Description

The Centreville Barrens were the only significant serpentine barrens in Delaware, and were extensively botanized by Albert Commons, who farmed nearby. It was largely submerged after the construction of the Hoopes Reservoir in 1932. A few fragments of serpentine still exist near the reservoir on private property with a few characteristic serpentine flora.

Description

The Grubbs Corner Barrens are almost undocumented. They were identified in the Lancaster County Natural Resources Inventory of 2008 as part of the Haines Glen area. A small quantity of red cedar forest, succeeding grassland, is still present.

Visiting

This barrens is privately owned and should not be visited.

Description

Bald Friar was the site of a ford and ferry over the Susquehanna River, probably predating European settlement. Extensive prehistoric petroglyphs in the river nearby were removed before the site was flooded by the Conowingo Dam and are partly preserved. Clyde Reed described the area as a serpentine barrens; there are few references to it, but voucher specimens exist of some grassland indicator species.

Description

A prehistoric steatite quarry is located on the premises. This region was known during the nineteenth century as "The Glades", presumably referring to open serpentine areas reverting to woodland, and subsequently filling with greenbriar. The area was acquired by the Havre Iron Company to prospect for iron ore. The directors ultimately formed a separate company to work the serpentine deposit for building stone.