{
  "@context": {
    "skos": "http://www.w3.org/2004/02/skos/core#",
    "mat": "https://w3id.org/isample/vocabulary/material/"
  },
  "@id": "mat:earthmaterial",
  "@type": [
    "skos:Concept"
  ],
  "skos:prefLabel": {
    "@value": "Natural Solid Material",
    "@language": "en"
  },
  "skos:definition": {
    "@value": "A naturally occurring solid material that is not anthropogenic, biogenic, or ice.",
    "@language": "en"
  },
  "skos:inScheme": {
    "@id": "mat:materialsvocabulary"
  },
  "skos:broader": [
    {
      "@id": "mat:material"
    }
  ],
  "skos:closeMatch": [
    {
      "@id": "http://resource.geosciml.org/classifier/cgi/lithology/compound_material"
    },
    {
      "@id": "https://w3id.org/gso/geology/Solid_Geologic_Material"
    }
  ],
  "skos:narrower": [
    {
      "@id": "mat:mineral",
      "@type": [
        "skos:Concept"
      ],
      "skos:prefLabel": {
        "@value": "Mineral",
        "@language": "en"
      },
      "skos:definition": {
        "@value": "Material consists of a single mineral or mineraloid phase.  'A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes.' (Nickel, Ernest H. (1995), The definition of a mineral, The Canadian Mineralogist. 33 (3): 689-90). Include mineraloids. ... A material primarily composed of some substance that is naturally occurring, solid and stable at room temperature, representable by a chemical formula, usually abiogenic, and that has an ordered atomic structure. (http://purl.obolibrary.org/obo/ENVO_01000256). The identity of a mineral species is defined by a crystal structure and a chemical composition that might include various specific elemental substitutions in that structure. Mineraloid: A naturally occurring mineral-like substance that does not demonstrate crystallinity. Mineraloids possess chemical compositions that vary beyond the generally accepted ranges for specific minerals. Examples: obsidian, Opal. (https://en.wikipedia.org/wiki/Mineraloid)",
        "@language": "en"
      },
      "skos:inScheme": {
        "@id": "mat:materialsvocabulary"
      },
      "skos:broader": [
        {
          "@id": "mat:earthmaterial"
        }
      ],
      "skos:exactMatch": [
        {
          "@id": "http://purl.obolibrary.org/obo/ENVO_01000256"
        }
      ]
    },
    {
      "@id": "mat:mixedsoilsedimentrock",
      "@type": [
        "skos:Concept"
      ],
      "skos:prefLabel": {
        "@value": "Mixed soil sediment or rock",
        "@language": "en"
      },
      "skos:definition": {
        "@value": "Material is mixed aggregation of fragments of undifferentiated soil, sediment or rock origin. e.g. cuttings from some boreholes (rock fragments and caved soil or sediment).",
        "@language": "en"
      },
      "skos:inScheme": {
        "@id": "mat:materialsvocabulary"
      },
      "skos:broader": [
        {
          "@id": "mat:earthmaterial"
        }
      ],
      "skos:note": {
        "@value": "This class is for samples that are solid Earth materials but known not to be mineral or particulate samples.",
        "@language": "en"
      }
    },
    {
      "@id": "mat:rockorsediment",
      "@type": [
        "skos:Concept"
      ],
      "skos:prefLabel": {
        "@value": "Rock or sediment",
        "@language": "en"
      },
      "skos:definition": {
        "@value": "Material is rock or sediment.  For example core from boreholes that likely penetrate sediment near the surface and rock at greater depth, with descriptions that do not clearly distinguish non-consolidated sediment from rock.",
        "@language": "en"
      },
      "skos:inScheme": {
        "@id": "mat:materialsvocabulary"
      },
      "skos:broader": [
        {
          "@id": "mat:earthmaterial"
        }
      ],
      "skos:note": [
        {
          "@value": "Use for samples described as rock>sedimentary AND sediment, where it is unclear whether the sample is a consolidated 'rock' object, or loose disaggregated material in a bag.",
          "@language": "en"
        },
        {
          "@value": "Use for samples like dredge hauls and ROV scoops that mix rock and sediment from a water body bottom.",
          "@language": "en"
        }
      ],
      "skos:scopeNote": {
        "@value": "Distinct from 'Mixed soil, sediment or rock' that represents samples known to have components of all these materials.",
        "@language": "en"
      },
      "skos:narrower": [
        {
          "@id": "mat:rock",
          "@type": [
            "skos:Concept"
          ],
          "skos:prefLabel": {
            "@value": "Rock",
            "@language": "en"
          },
          "skos:definition": {
            "@value": "Consolidated aggregate of particles (grains) of rock, mineral (including native elements), mineraloid, or solid organic material. Includes mineral aggregates such as granite, shale, marble; natural glass such as obsidian; organic material formed by geologic processes such a coal;  extraterrestrial material in meteorites; and  crushed rock fragments like drill cuttings from rock.  (based on http://resource.geosciml.org/classifier/cgi/lithology/rock, same as http://purl.obolibrary.org/obo/ENVO_00001995)",
            "@language": "en"
          },
          "skos:inScheme": {
            "@id": "mat:materialsvocabulary"
          },
          "skos:broader": [
            {
              "@id": "mat:rockorsediment"
            }
          ],
          "skos:closeMatch": [
            {
              "@id": "http://purl.obolibrary.org/obo/ENVO_00001995"
            },
            {
              "@id": "http://resource.geosciml.org/classifier/cgi/lithology/rock"
            }
          ]
        },
        {
          "@id": "mat:sediment",
          "@type": [
            "skos:Concept"
          ],
          "skos:prefLabel": {
            "@value": "Sediment",
            "@language": "en"
          },
          "skos:definition": {
            "@value": "Solid granular material transported by wind, water, or gravity, not modified by interaction with biosphere or atmosphere (to differentiate from soil). Particles might be derived by erosion of pre-existing rock, from shell or other body parts from organisms, precipitated chemically in the surficial environment, or generated by explosive volcanic activity. (http://resource.geosciml.org/classifier/cgi/lithology/sediment). Sediment is not consolidated, i.e. the particulate constituents do not adhere to each other strongly enough that the aggregate can be considered a solid material in its own right. Similar to http://purl.obolibrary.org/obo/ENVO_00002007",
            "@language": "en"
          },
          "skos:inScheme": {
            "@id": "mat:materialsvocabulary"
          },
          "skos:broader": [
            {
              "@id": "mat:rockorsediment"
            }
          ],
          "skos:closeMatch": [
            {
              "@id": "http://purl.obolibrary.org/obo/ENVO_00002007"
            },
            {
              "@id": "http://resource.geosciml.org/classifier/cgi/lithology/sediment"
            }
          ],
          "skos:note": [
            {
              "@value": "Note that this category includes chemical sediments that might preciptate to form a solid mass, e.g. preciptitates forming vents at submarine hot springs, or gypsum and halite deposites formed by evaporation in hypersaline lakes. (http://resource.geosciml.org/classifier/cgi/consolidationdegree/consolidated).",
              "@language": "en"
            },
            {
              "@value": "Tephra is subclass of sediment because it is generally not lithified, in which case it would be considered Rock.",
              "@language": "en"
            }
          ]
        }
      ]
    },
    {
      "@id": "mat:particulate",
      "@type": [
        "skos:Concept"
      ],
      "skos:prefLabel": {
        "@value": "Particulate",
        "@language": "en"
      },
      "skos:definition": {
        "@value": "Material consists of microscopic particulate material derived by precipitation, filtering, or settling from suspension in a fluid, e.g. filtrate from water, deposition from atmosphere, astro material particles. Might include mineral, organic, or biological material. ENVO definition (ENVO_01000060) has \"composed of microscopic portions of solid or liquid material suspended in another environmental material.\" Refine here to define as the solid particles, distinct from a material in which they are suspended. A material that includes solid or liquid particles suspended in another material would be a dispersed_media in this scheme, not defined in ENVO. Human manufactured particulates (e.g. rock powder) should be categorized as 'Anthropogenic material' as well as 'Particulate'",
        "@language": "en"
      },
      "skos:inScheme": {
        "@id": "mat:materialsvocabulary"
      },
      "skos:broader": [
        {
          "@id": "mat:earthmaterial"
        }
      ],
      "skos:narrowMatch": [
        {
          "@id": "http://purl.bioontology.org/ontology/MESH/D052638"
        },
        {
          "@id": "http://purl.obolibrary.org/obo/NCIT_C1709"
        }
      ],
      "skos:relatedMatch": [
        {
          "@id": "http://purl.obolibrary.org/obo/ENVO_01000060"
        }
      ]
    },
    {
      "@id": "mat:soil",
      "@type": [
        "skos:Concept"
      ],
      "skos:prefLabel": {
        "@value": "Soil",
        "@language": "en"
      },
      "skos:definition": {
        "@value": "Mixed granular mineral and organic matter modified by interaction between earth material, biosphere, and atmosphere, consisting of varying proportions of sand, silt, and clay, organic material such as humus, gases, liquids, and a broad range of resident micro- and macroorganisms. (https://en.wikipedia.org/wiki/Soil) Soil consists of horizons near the Earth's surface that, in contrast to the underlying parent material, have been altered by the interactions of climate, relief, and living organisms over time. (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/edu/?cid=nrcs142p2_054280) (http://purl.obolibrary.org/obo/ENVO_00001998)",
        "@language": "en"
      },
      "skos:inScheme": {
        "@id": "mat:materialsvocabulary"
      },
      "skos:broader": [
        {
          "@id": "mat:earthmaterial"
        }
      ],
      "skos:closeMatch": [
        {
          "@id": "http://purl.obolibrary.org/obo/ENVO_00001998"
        }
      ]
    }
  ]
}