A (soil cover) can be thick.Logical formLearned from9 sentences. A (salt layer) can be thick.Logical formLearned from9 sentences. (Glass bottles) can be thick.Logical formLearned from9 sentences. Some places can be thick.Logical formLearned from9 sentences. An incrustation can be thick.Logical formLearned from9 sentences. (Blood films) can be thick.Logical formLearned from9 sentences. Gels can be thick.Logical formLearned from9 sentences. An outer coat can be thick.Logical formLearned from9 sentences. Crystals can be thick.Logical formLearned from9 sentences. An (ice sheet) can be thick.Logical formLearned from9 sentences. Secretions can be thick.Logical formLearned from9 sentences. A sandstone can be thick.Logical formLearned from9 sentences. Paintings can be thick.Logical formLearned from9 sentences. (File folders) can be thick.Logical formLearned from9 sentences. A filter can be thick.Logical formLearned from9 sentences.