(Sea ice) may form ridges.Logical formLearned from2 sentences. Ridges may create obstacles to someone.Logical formLearned from2 sentences. A thickness of ridges can be meters.Logical formLearned from2 sentences. Ridges can be (mountain ranges).Logical formLearned from2 sentences. (Ice piles) can be into ridges.Logical formLearned from2 sentences. Ridges may pertain-to a back.Logical formLearned from2 sentences. (Beach ridges) may be formed.Logical formLearned from2 sentences. (Beach ridges) may be formed.Logical formLearned from2 sentences. (Oak savanna) may be developed on ridges.Logical formLearned from2 sentences. A plain can be constituted-of-or-filled-with ridges.Logical formLearned from2 sentences. Plants may grow on ridges.Logical formLearned from2 sentences. Ridges can be in a field.Logical formLearned from2 sentences. (Oak ridges) can be in parts of a territory.Logical formLearned from2 sentences. Ridges can be undisturbed.Logical formLearned from2 sentences. Ridges may undergo maintenance.Logical formLearned from2 sentences.