See 26InchSlicks: Crossing Washington State on the John Wayne Pioneer Trail. 10 longest. Of the longest trails compiled by the Rails to Trails Conservancy, here are the 10 longest that are accessible to bicycles: Cyclists ride along the nearly dry Keechelus lake bed in the fall.
Parent material. Parent material is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form.
1. the substance of which a thing is made or composed; component or constituent matter: raw material. 2. facts, notes, etc, that a finished work may be based on or derived from: enough material for a book. 3. (Textiles) cloth or fabric. 4. a person who has qualities suitable for a given occupation, training, etc: that boy is not university material.