Snow Observation in, of or sample taken from snow. Adapted from CUAHSI HIS SampleMediumCV. See http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=SampleMediumCV. Rock Specimen collected from a naturally occuring solid aggregate of one or more minerals. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php. Definition adapted from Wikipedia. See: https://en.wikipedia.org/wiki/Rock_(geology) Vegetation The plants of an area considered in general or as communities, but not taxonomically. Retrieved from Eionet GEMET Thesaurus http://www.eionet.europa.eu/gemet/concept?ns=1&cp=8922 Gas Gas phase specimen or sensor emplaced to measure properties of a gas. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Habitat A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant, or other type of organism. Adopted from STORET into USGS National Water Quality Portal. http://waterqualitydata.us/portal_userguide/#WQPUserGuide-Table2 Definition from https://en.wikipedia.org/wiki/Habitat Necessary to describe ecosystem properties, such as: birds per km2 of habitat STORET definition: The habitat conditions at the monitoring site; physical features of the area surrounding the monitoring location site. Regolith The entire unconsolidated or secondarily recemented cover that overlies more coherent bedrock, that has been formed by weathering, erosion, transport and/or deposition of the older material. The regolith thus includes fractured and weathered basement rocks, saprolites, soils, organic accumulations, volcanic material, glacial deposits, colluvium, alluvium, evaporitic sediments, aeolian deposits and ground water. Everything from fresh rock to fresh air. Merrill, G. P. (1897) A treatise on rocks, rock weathering and soils. New York, Macmillan. 411 pp. http://crcleme.org.au/Pubs/Monographs/RegolithGlossary.pdf The term was introduced by Merrill (1897) who wrote of the incoherent mass of varying thickness covering the underlying rocks: “In places this covering is made up of material originating through rock weathering in-situ. In other instances it is of fragmental and more or less decomposed material drifted by wind, water or ice from other sources. This entire mantle of unconsolidated material, whatever its nature or origin, it is proposed to call the regolith, from the Greek words rhego), meaning a blanket, and lithos, a stone.” ODM2 Medium Controlled Vocabulary ODM2 Group A vocabulary for describing the physical medium of a specimen, reference material, or sampled environment. Tissue Sample of a living organism's tissue or sensor emplaced to measure property of tissue. Other Other. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Soil Specimen collected from soil or sensor emplaced to measure properties of soil. Soil includes the mixture of minerals, organic matter, gasses, liquids, and organisms that make up the upper layer of earth in which plants grow. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Ice Sample collected as frozen water or sensor emplaced to measure properties of ice. Not applicable There is no applicable sampled medium. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php This term should be used in the case that there is no medium or medium does not apply in some context. Unknown The sampled medium is unknown. Adapted from CUAHSI HIS SampleMediumCV. See http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=SampleMediumCV. Liquid organic Specimen collected as an organic liquid. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Liquid aqueous Specimen collected as liquid water or sensor emplaced to measure properties of water in sampled environment. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Sediment Specimen collected from material broken down by processes of weathering and erosion and subsequently transported by the action of wind, water, or ice, and/or by the force of gravity acting on the particles. Sensors may also be emplaced to measure sediment properties. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php. Definition adapted from Wikipedia. See: https://en.wikipedia.org/wiki/Sediment Air Specimen collection of ambient air or sensor emplaced to measure properties of ambient air. Equipment An instrument, sensor or other piece of human-made equipment upon which a measurement is made, such as datalogger temperature or battery voltage. Particulate Specimen collected from particulates suspended in a paticulate-fluid mixture. Examples include particulates in water or air. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php Organism Data collected about a species at organism level. Mineral Specimen collected as a mineral. Adapted from SESAR Material CV. See http://app.geosamples.org/reference/materials.php