environmental material bituminous sand 2021-04-05T16:38:47.162Z An environmental material which consists of either loose sands or partially consolidated sandstone, containing a naturally occurring mixture of sand, clay, and water, soaked with a dense and extremely viscous form of petroleum. TODO: create an astonomical body part 'bituminous sands" and assert composed primarily of realtionship. Xref https://github.com/EnvironmentOntology/envo/issues/1154. TREATED THIS as a material entity. could add something like "oil sands deposit" as a geospatial location later. crude bitumen oil sands tar sands