The Structure of The Old Stone Fort
The walls of the Old Stone Fort consist of stone and earthwork, and are on average approximately 4–6 feet high. The walls originally consisted of an inner and outer layer of crudely stacked rocks and slabs with gravel and earthen fill in between. Over the centuries, the earthen fill has spilled over the rock layers, giving the walls their current mound-like appearance.
The walls can be divided into roughly three sections, with two sections running roughly parallel to the Duck and Little Duck Rivers, and a third section running parallel to the southern rim of the peninsula. The sections paralleling the rivers gradually move inward, away from their respective rivers, and approach one another in a pincer-like formation at the northeastern half of the peninsula. Here, both walls terminate just before converging, allowing for a small entrance. Two ancient "pedestal" mounds— one 35 feet (11 m) in diameter and the other 48 feet (15 m) in diameter— are located on either side of the structure's entrance. The entrance continues through a 120-foot (37 m) L-shaped corridor which opens into the structure's interior.
The fort's northwestern walls (following the Duck River) are approximately 1,394 feet (425 m) long, and the southeastern walls (following the Little Duck) are approximately 1,094 feet (333 m) in length. The southern walls, which are basically straight with the exception of an area where the ridge bulges outward, are 2,116 feet (645 m) long. Large open sections are found between both the southern wall and the northwestern wall and the southern wall and the southeastern wall. These areas were probably left open due to the fact that they overlook steep bluffs carved out by the Duck and Little Duck rivers whose waters probably performed the same function as the mounds.
A substantial ditch, known as the "moat", parallels the southern wall at the base of the ridge. This ditch is a natural feature and is actually an abandoned river channel. However, it is not known if this channel was artificially kept open in prehistory.
Read more about this topic: Old Stone Fort (Tennessee)
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