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a description of the spatial continuity of the data. The experimental variogram is a discrete function calculated using a measure of variability between pairs of points at various distances. The exact measure used depends on the variogram type selected o display the variability between data points as a function of distance. An example of an idealized variogram is shown below. You might say that along this orientation, closely-spaced data points show a low degree of variability while distant points show a higher degree of variability.
Variogram
sed in structural geology because they present no statistical bias when large numbers of data are plotted. On the equal-area net area is preserved so, for example, each 2 degrees polygon on the net has the same area.
Equal-area stereonets
represents a fault plane by a dot which is the intersection of a line normal to the fault plane and a lower hemisphere projection.
stereonets
soils that show little or no evidence of pedogenic horizon development.
entisols
soils of semiarid to humid environments that generally exhibit only moderate degrees of soil weathering and development.
inceptisols
soils that have permafrost near the soil surface and/or have evidence of cryoturbation (frost churning) and/or ice segregation.
gelisols
formed from weathering processes that strip organic matter combined with aluminum (with or without iron) from the surface layer and deposit them in the subsoil.
spodosols
moderately leached soils that have relatively high native fertility. rich in Fe
alfisols
strongly leached, acid forest soils with relatively low native fertility. They are found primarily in humid temperate and tropical areas of the world, typically on older, stable landscapes.
ultisols
CaCO3-containing soils of arid regions that exhibit subsurface horizon development. They are characterized by being dry most of the year and limited leaching. contain subsurface horizons in which clays, calcium carbonate, silica, salts and/or gypsum have accumulated. desert soils
ardisols
soils that have a dark colored surface horizon relatively high in content of organic matter. The soils are base rich throughout and therefore quite fertile. most fertile
mollisols
highly weathered soils of tropical and subtropical regions. They are dominated by low activity minerals, such as quartz, kaolinite, and iron oxides. most horizon development rainforest soils
oxisols
lack soil”) are soils that have formed in volcanic ash or other volcanic ejecta. They differ from those of other orders in that they typically are dominated by glass and short-range-order colloidal weathering products such as allophane, imogolite and ferrihydrite
andisols
bogs, moors, peats, or mucks. wetlands
histosols
clay-rich soils that shrink and swell with changes in moisture content. During dry periods, the soil volume shrinks and deep wide cracks form.
vertisols
arsenic sulfides and orpiment are common deposits of what type of ore
carlin depostis
lithium bearing minerals
petalite
spodumene
lepidolite
fairy stone
staurolite
alias
moonstone
alumstone
iceland spar
red resin
plumbago
peridot
soapstone
pitchblende
albite
alunite
calcite
cinnabar
graphite
olivine
talc
uraninite
garnet mineral that is chromium bearing
uvarovite
sorosilicate with a compact green variety named californite
vesuvianite
asbestos skeme of ribeckite
crocidolite
zinc and iron sulfide mineral with the chemical formula (Zn,Fe)S, a less frequently encountered structural polymorph form of sphalerite. The iron content is variable up to eight percent. It is trimorphous with matraite and sphalerite.
wurzite
copper sulfide mineral with formula: Cu₉S₅. Digenite is a black to dark blue opaque mineral that crystallizes with a trigonal - hexagonal scalenohedral structure. In habit it is usually massive, but does often show pseudo-cubic forms. It has poor to indistinct cleavage and a brittle fracture.
digenite
