Ridges may be regarded as an equivalent of a lens.Logical formLearned from2 sentences. The west may pertain-to ridges.Logical formLearned from2 sentences. Evidence may include ridges.Logical formLearned from2 sentences. (Chalk ridges) may pertain-to downs.Logical formLearned from2 sentences. Ridges may mark a watershed.Logical formLearned from2 sentences. Ridges may include a mountain.Logical formLearned from2 sentences. Faces may pertain-to ridges.Logical formLearned from2 sentences. Ridges may border a lake.Logical formLearned from2 sentences. Upwards of some inches may accumulate on ridges.Logical formLearned from2 sentences. Ridges can be at scales.Logical formLearned from2 sentences. A (differential erosion) may form ridges of mountains.Logical formLearned from2 sentences. Ridges may be seen on a surface of beaks of turtles.Logical formLearned from2 sentences. Nails may feature ridges.Logical formLearned from2 sentences. Ridges can be a constituent of a watershed.Logical formLearned from2 sentences. Ridges can be around a mouth.Logical formLearned from2 sentences.