Remarkable Rocks are naturally sculptured formations precariously balanced atop a granite outcrop. Nottingham Castle was constructed in 1068 on a sandstone outcrop by the River Leen. The fort was situated on a rocky outcrop overlooking the new bridge. The rectangular tower is of four storeys, situated on top of a rocky outcrop. Investigators looked at a nunatak outcrop in the icefield and found highly mineralized rock. The rocky outcrop in the background is the Tarpeian Rock. To the south of the castle on its rocky outcrop are the formal gardens. Every mountain, river, spring, marsh, tree and rocky outcrop was inspirited. "Tor" is a term for a craggy outcrop or lookout. A rock formation is an isolated, scenic, or spectacular surface rock outcrop. Rocks often contain small-scale structures (smaller than the scale of an individual outcrop). It had a granite outcrop and a landscape of dead trees. Examples of this type of dacite outcrop are found in northwestern Montana and northeastern Bulgaria. Most of the high ground and ridgetops are sequences of quartzites that outcrop along strike. Most land is farmland, with woodland on the Goring Gap outcrop of the Chiltern Hills.