| Egenskap |
Stereotype |
Beskrivelse |
Type |
Multiplisitet |
| particleType |
|
Terms to specify the nature of individual particles of each constituent in an Earth Material aggregation, based mostly on their genesis. If applied on ParticleDescription for CompoundMaterial, then would characterize all particles in aggregate. Use this property on CompoundMaterial to distinguish rocks composed of crystals (crystalline rocks) from rocks composed of granular particles (clasts, fragments). Examples include oolith, crystals, pore space. Constituent type is determined based on the nature of the particles, and ideally is independent of the relationship between particles in a compound material aggregation.
See discussion of particleType vs ConstituentPart.role in the scope notes for ConstituentPart.
|
ParticleTypeTerm
(kodeliste)
|
1..1 |
| aspectRatio |
|
AspectRatio describes the geometry of particles based on the ratios of lengths of long, intermediate and short axes of grains. Equates to sphericity in sedimentary rocks (ie: the degree to which the shape of a particle approximates a sphere). A quantitative specification based on the ratio of lengths of long, intermediate and short axes of grain shape (Sneed and Folk, 1958; Zingg, 1935). (eg: prolate, slightly flattened, very bladed, equant, acicular, tabular)
|
CGI_Term
(datatype)
|
1..* |
| - qualifier |
|
A qualifying term (eg; sometimes, common, always) used with term values. |
ValueQualifierCode
(kodeliste)
|
1..1 |
| - value |
|
A byReference attribute, referring to a vocabulary of terms suitable to describe a GeoSciML element.
|
CodeListValue
(kodeliste)
|
1..1 |
| shape |
|
The Shape attribute describes, a) the development of crystal faces bounding particles in crystalline compond materials, and b) surface rounding of grains in sedimentary rocks. Roundness is a measure of the sharpness of the edges between surfaces bounding a particle (see Jackson, 1997; Wadell, 1932). Terms should be appropriate for the kind of compound material (eg: for crystalline rocks- euhedral, ideoblastic, subhedral, anhedral, xenoblastic; for sedimentary rocks - angular, rounded)
|
CGI_Term
(datatype)
|
1..* |
| - qualifier |
|
A qualifying term (eg; sometimes, common, always) used with term values. |
ValueQualifierCode
(kodeliste)
|
1..1 |
| - value |
|
A byReference attribute, referring to a vocabulary of terms suitable to describe a GeoSciML element.
|
CodeListValue
(kodeliste)
|
1..1 |
| size |
|
The Size attribute specifies particle grainsize. Values may be reported using absolute measurements (eg: range, mean, median, mode, maximum) or as descriptive terms from a schema appropriate to the type of Compound Material (eg: the Udden-Wentworth sheme for clastic sedimentary rocks - silt, sand, gravel; volcaniclastic rocks - ash, lapilli, bomb; crystalline rocks - fine, medium, coarse, cryptocrystalline)
|
CGI_NumericRange
(datatype)
|
1..1 |
| - estimatedValue |
|
A single measured value chosen on some basis (eg; mean, mode, median, best guess) that is representative for the measurement. Best practice to consider the value and uom attributes of swe:Quantity to be mandatory. |
Quantity |
1..1 |
| sorting |
|
The Sorting attribute holds text terms to specify size distribution of particles in a CompoundMaterial. Terminology for sorting in sedimentary rocks is based on the quantitative Graphic Standard Deviation (IGSD) scheme proposed by Folk (1968, 1974). Example terms for this attribute may include sedimentary terms such as well sorted and poorly sorted, or igneous terms such as porphyritic, equigranuilar, seriate.
|
CGI_Term
(datatype)
|
1..* |
| - qualifier |
|
A qualifying term (eg; sometimes, common, always) used with term values. |
ValueQualifierCode
(kodeliste)
|
1..1 |
| - value |
|
A byReference attribute, referring to a vocabulary of terms suitable to describe a GeoSciML element.
|
CodeListValue
(kodeliste)
|
1..1 |