An array can be constituted-of-or-filled-with ridges.Logical formLearned from4 sentences. Ridges can be spiky.Logical formLearned from4 sentences. Some ridges can be constituted-of-or-filled-with rock.Logical formLearned from4 sentences. Some places may have groups of ridges.Logical formLearned from4 sentences. Ridges can be to the west.Logical formLearned from4 sentences. A labrum can be with some ridges.Logical formLearned from4 sentences. A cluster can be constituted-of-or-filled-with ridges.Logical formLearned from4 sentences. A level may pertain-to ridges.Logical formLearned from4 sentences. (Mountain ridges) can be rugged.Logical formLearned from4 sentences. Ridges may undergo a collection.Logical formLearned from4 sentences. Soils can be constituted-of-or-filled-with ridges.Logical formLearned from4 sentences. A peak may pertain-to ridges.Logical formLearned from4 sentences. Ridges can be in an area.Logical formLearned from4 sentences. Some ridges may radiate from a summit.Logical formLearned from4 sentences. Ridges can be bald.Logical formLearned from4 sentences.