Main ridges may form a system.Logical formLearned from1 sentences. A strike may pertain-to main ridges.Logical formLearned from1 sentences. A person may count backs of some ridges.Logical formLearned from1 sentences. Ridges can be close-packed.Logical formLearned from1 sentences. Outlines may pertain-to ridges.Logical formLearned from1 sentences. Line can be upon line of ridges.Logical formLearned from1 sentences. An extension may be checked by ridges.Logical formLearned from1 sentences. Ridges may be bounded.Logical formLearned from1 sentences. A district may consist of a series of ridges.Logical formLearned from1 sentences. Ridges may undergo an articulation.Logical formLearned from1 sentences. A number of ridges may radiate in some directions.Logical formLearned from1 sentences. Passes can be across main ridges.Logical formLearned from1 sentences. Ridges may give a structure of altitudes.Logical formLearned from1 sentences. Hills may send_off ridges.Logical formLearned from1 sentences. Parallelism of (mountain ridges) can be attributable to a folding of rocks.Logical formLearned from1 sentences.