Ridges may be exposed.Logical formLearned from2 sentences. Ridges can be peaked.Logical formLearned from2 sentences. A soil may be formed into ridges.Logical formLearned from2 sentences. Ridges may be positioned.Logical formLearned from2 sentences. Nurseries can be at ridges.Logical formLearned from2 sentences. (Spy satellite technology) may be created for mapping (mountain ridges).Logical formLearned from2 sentences. Neighborhoods can be on (mountain ridges).Logical formLearned from2 sentences. Alluvial-fan may surface into ridges.Logical formLearned from2 sentences. Some problems may be related to deep structure of ridges.Logical formLearned from2 sentences. Deep structure can be constituted-of-or-filled-with ridges.Logical formLearned from2 sentences. Vents can be at mid-ocean ridges.Logical formLearned from2 sentences. An origin may pertain-to ridges.Logical formLearned from2 sentences. Structure of parallel may elongate ridges with basins.Logical formLearned from2 sentences. Ridges can be transparent.Logical formLearned from2 sentences. Ridges can be constituted-of-or-filled-with some facets.Logical formLearned from2 sentences.