Positions can be on ridges.Logical formLearned from2 sentences. Some ridges may meet.Logical formLearned from2 sentences. Ridges may pertain-to dunes.Logical formLearned from2 sentences. Ridges may pertain-to a river.Logical formLearned from2 sentences. A (papillary dermis) may interdigitate with ridges of an epidermis.Logical formLearned from2 sentences. Ridges can be small-scale.Logical formLearned from2 sentences. Areas can be between some ridges.Logical formLearned from2 sentences. Ridges may be used for activities.Logical formLearned from2 sentences. The north may pertain-to ridges.Logical formLearned from2 sentences. Some main ridges may radiate from a summit.Logical formLearned from2 sentences. Ridges can be lobate.Logical formLearned from2 sentences. Ridges can be constituted-of-or-filled-with (cross section).Logical formLearned from2 sentences. Ridges may generate terrain.Logical formLearned from2 sentences. Ridges may be separated by canyons.Logical formLearned from2 sentences. Ridges can be in fields.Logical formLearned from2 sentences.