(Ocean ridges) can be sharp.Logical formLearned from2 sentences. Magma may form at mid-ocean ridges.Logical formLearned from2 sentences. Ridges can be in a background.Logical formLearned from2 sentences. (Sand ridges) can be offshore.Logical formLearned from2 sentences. Features may pertain-to ridges.Logical formLearned from2 sentences. Ridges can be sharp.Logical formLearned from2 sentences. A sheet may be guided by ridges.Logical formLearned from2 sentences. (Limestone ridges) can be bare.Logical formLearned from2 sentences. A region can be constituted-of-or-filled-with (limestone ridges).Logical formLearned from2 sentences. Ridges can be evident.Logical formLearned from2 sentences. Mid-ocean ridges can be volcanic.Logical formLearned from2 sentences. A position may pertain-to ridges.Logical formLearned from2 sentences. Some focus can be subduction of ridges.Logical formLearned from2 sentences. Ridges can be passive.Logical formLearned from2 sentences. Ridges may undergo a subduction.Logical formLearned from2 sentences.