Layer: Geologic Units (ID:10)

View In: Map Viewer

Name: Geologic Units

Display Field: UnitName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description:

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Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

",SPHEROID["",6051000.0,0.0]],PRIMEM["",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",195.0],PARAMETER["Standard_Parallel_1",34.0],PARAMETER["Standard_Parallel_2",73.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",90.0],UNIT["Meter",1.0]]

Drawing Info:

{"renderer":{"type":"uniqueValue","field1":"unit_type","uniqueValueInfos":[{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[222,204,153,255],"outline":null},"value":"deformation belt","label":"Deformation belt material (bl)","description":"Deformation belt material (bl)—Smooth material of low to intermediate radar backscatter (-15.24 dB mean) covering 55.1 x 103 km2, largely located in the north-central and northeastern parts of the quadrangle. Characterized by high degrees of contractional (early phase) deformation, plus later extensional deformation, aligned subparallel to the trend of an elongated topographic rise (+230 m mean elevation). Embayed by all other materials with which it is in contact. Type locality: lat 44.3°N, long 195.5°E. Interpretation: old plains material heavily deformed by compression, presumed volcanic in origin, preserved as elevated kipukas within younger, less deformed units."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[128,102,77,255],"outline":null},"value":"tessera","label":"Tessera terrain (t)","description":"Tessera terrain (t)—High (-12.31 dB) mean radar backscatter coefficient material covering 0.39 x 106 km2; includes parts or all of Nemesis, Athena and Lahevhev. Deformed by at least two intersecting sets of short-wavelength, ridge-and-trough style lineaments, to the extent that precursor materials can no longer be identified. Deformation often uniform locally and sometimes regionally. Commonly crosscut by longer lineaments, and interior may contain younger volcanic flows. High standing, with a mean elevation of +400 m relative to quadrangle norm. Older than all other materials with which it is in contact. Type locality: lat 41.0°N, long 186.0°E. Interpretation: old, complexly deformed material that largely records strain predating emplacement of regional plains and other materials."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[25,102,0,255],"outline":null},"value":"homogeneous plains","label":"Homogeneous plains material (ph)","description":"Homogeneous plains material (ph)—Very low backscatter material (-19.45 dB mean) covering 14.8 x 103 km2, at a single location on the flanks of a large domical rise in the north central part of the quadrangle. Characterized by feathery margins, a lack of internal texture, and unusually high RMS slope for a unit that exhibits minimal to no surface deformation. Emplaced at a mean elevation of +340 m, interaction with older units and structures, which it appears to either embay or mantle, indicates variable thickness within the unit. Embays units t, pr2 and ps, and occupies the youngest stratigraphic position within the quadrangle. Type locality: lat 44.5°N, long 193.5°E. Interpretation: Possible pyroclastic flow deposit."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[0,102,77,255],"outline":null},"value":"shield plains","label":"Shield plains material (ps)","description":"Shield plains material (ps)—Mottled material with highly variable but generally low radar backscatter (-16.36 dB mean), covering 0.55 x 106 km2 at locations throughout the quadrangle. Characterized by a high density of small (<10 km) edifices, largely with shield morphology, and overlapping aprons of erupted material. Minimally deformed, the smooth material occurs most often within coronae or as large isolated patches. With a mean elevation of +40 m, the unit’s mean topography is indistinguishable from that of the quadrangle as a whole. Unit ps materials are superimposed upon units pr1, pr2, pr3, pl, bl, co and t, and are in turn embayed by units ph and fe. Type locality: lat 44.3°N, long 197.3°E. Interpretation: young volcanic plains formed largely of overlapping lavas erupted from locally dense concentrations of small shield volcanoes."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,153,235,255],"outline":null},"value":"Lahevhev hummocky plains","label":"Lahevhev hummocky plains material (pLh)","description":"Lahevhev hummocky plains material (pLh)—Narrow zone of material with very high radar backscatter (-12.21 dB mean) covering 12.5 x 103 km2 in the southeastern corner of the quadrangle. Material is characterized by hummocky topography, with elongate peaks and troughs at ~10 km wavelength, and has been cut by a dense network of extensional lineaments. The hummocks and the lineaments are parallel to the long dimension of the unit as a whole, co-aligned with those in unit pLl, and are generally orthogonal to extensional lineaments in adjacent tessera. Patches of late-stage volcanic material occupies lower areas. With a mean elevation of -50 m, the material lies 500-700 m below the surrounding tessera. Superimposed on unit t, synchronous (based on cross cutting and superposition relationships) with pLl, and embayed by unit pr2. Type locality: lat 28.3°N, long 187.5°E. Interpretation: material is the end product of a localized sequence of volcanic eruption and oblique extension that has rifted apart a major block of Lahevhev Tessera."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,179,255,255],"outline":null},"value":"Lahevhev lineated plains","label":"Lahevhev lineated plains material (pLl)","description":"Lahevhev lineated plains materials (pLl)—Material with very high radar backscatter (-12.41 dB mean) covering 0.15 x 106 km2 in the southeastern corner of the quadrangle. Characterized by expanses of smooth plains and locally dense concentrations of extensional lineaments, often organized into sinuous bands 10s to 100s of kilometers long that are co-aligned with the lineaments in pLh. The mean elevation, +400 m, is similar to but slightly lower than the adjacent tessera. Superimposed on unit t, synchronous (based on cross cutting and superposition relationships) with units pLh and pr1, and embayed by unit pr2. Type locality: lat 27.0°N, long 190.0°E. Interpretation: an elevated expanse of older plains, presumed volcanic, fractured by oblique extension."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[153,222,128,255],"outline":null},"value":"Ganis Chasma plains","label":"Ganis Chasma material (pG)","description":"Ganis Chasma material (pG)—Smooth material with high radar backscatter (-12.08 dB mean) covering 0.16 x 106 km2 in the southwestern part of the quadrangle. Largely predates extensional deformation defining Ganis Chasma rifting, but materials are younger in small patches. Locally the oldest unit, occurs at very high elevations (+620 m mean elevation, highest in quadrangle), and is embayed by units pr1 and pr2. Type locality: lat 26.5°N, long 182.0°E. Interpretation: old plains material, presumably volcanic in origin, that predates the structural deformation and uplift characterizing Ganis Chasma."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[153,222,179,255],"outline":null},"value":"lineated plains","label":"Lineated plains material (pl)","description":"Lineated plains material (pl)—Smooth material of variable but generally high radar backscatter (-14.28 dB mean) covering 0.33 x 106 km2, largely located in the central and southern parts of the quadrangle. Deformed by numerous short, subparallel extensional lineaments, generally aligned E-W; occasionally deformation also cuts adjacent tessera or occurs in association with corona topography. Often contains numerous small (<10 km) shield volcanoes. Mean elevation is +110 m. Superimposed on units t and bl, and embayed by units pr1, pr2, pr3, ps and fe. Type locality: lat 31.6°N, long 181.6°E. Interpretation: old plains material, densely fractured and presumed volcanic in origin, preserved as elevated kipukas within younger, less deformed units."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[179,204,255,255],"outline":null},"value":"regional plains, 3","label":"Regional plains material, 3 (pr3)","description":"Regional plains material, 3 (pr3)—Material with intermediate backscatter (-15.46 dB mean), covering 0.61 x 106 km2 of the quadrangle, largely in the northeast corner. Characterized by a distinctively uniform, featureless texture. Extensively deformed by contractional lineaments but by very few extensional lineaments. Mean elevation, at -450 m, is the lowest in the quadrangle. Superimposed on units t, bl, pl, cof, and pr2, and embayed by unit ps and all unit fe it abuts (except Xtoh Mons). Type locality: lat 44.0°N, long 205.3°E. Interpretation: youngest episode of regional volcanic plains, occupying lowest areas and predominantly deformed by contractional deformation."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[0,77,179,255],"outline":null},"value":"regional plains, 2","label":"Regional plains material, 2 (pr2)","description":"Regional plains material, 2 (pr2)—Material with very low radar backscatter (-17.84 dB mean), covering 2.66 x 106 km2 (~40%) of the map region; most extensive plains unit in the quadrangle. Characterized by a smooth, lightly mottled to featureless appearance. Areas of higher topographic relief can exhibit clear-cut contacts with other units, but in areas of low slopes the edge of the unit is characterized by indistinct/gradational contacts, with faint lobate margins occurring in some areas. Preserves both extensional and contractional deformation to varying degrees in different areas. Mean elevation is -110 m. Superimposed upon units t, bl, pl, pr1, pLh and pLl, and embayed by units pr3, fe, ps and ph. Cut by Baltis Vallis channel. Type locality: lat 40.5°N, long 199.0°E. Interpretation: smooth, locally thin, possibly low viscosity volcanic plains subsequently deformed by both extensional and contractional deformation."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[0,204,255,255],"outline":null},"value":"regional plains, 1","label":"Regional plains material, 1 (pr1)","description":"Regional plains material, 1 (pr1)—Material with high radar backscatter (-13.62 dB mean), covering 0.86 x 106 km2 in the southern half of the quadrangle. Characterized by a highly mottled appearance, with individual patches sometimes displaying lobate margins. Preserves a higher than usual concentration, per unit area, of both extensional and contractional deformation, and in some locations numerous small shield volcanoes occur. Mean elevation is 180 m. Stratigraphic contact relationships suggest a prolonged history of spatially and temporally variable emplacement, but pr1 is generally superimposed on t, pl and pG, synchronous with pLl, and embayed by pr2, fe and ps. Type locality: lat 33.0°N, long 192.0°E. Interpretation: an early sequence of regionally expansive volcanic plains, subsequently deformed by both extensional and contractional deformation, that are preserved as elevated islands embayed by younger plains."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,128,128,255],"outline":null},"value":"volcano edifice flows","label":"Volcanic edifice flow material (fe)","description":"Volcanic edifice flow material (fe)—Intermediate to high radar backscatter (-14.69 dB mean) materials, covering 0.66 x 106 km2 across the quadrangle. Characterized by sheeted and digitate material with lobate boundaries and, in many instances, topographically controlled contacts. Contains many small- and intermediate-size volcanic edifices. Largely undeformed, with exceptions including regional contractional deformation in some areas and radiating extensional lineaments in others. Mean elevation of -30 m, indistinguishable from that of the quadrangle as a whole. While local exceptions exist, particularly at long-lived centers such as Dutrieu Patera, unit fe is generally superimposed on units pr1, pr2, pr3, t, bl, pl and ps. Type locality: lat 28.0°N, long 207.5°E. Interpretation: young volcanic flows originating from a local volcanic center, often a major edifice."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,179,0,255],"outline":null},"value":"corona flows","label":"Corona flow material (cof)","description":"Corona flow material (cof)—Material with intermediate radar backscatter (-15.05 dB mean), covering 58.4 x 103 km2 at two locations in the western part of the quadrangle. Characterized by a lightly mottled texture at small scales, and tends to be more heavily deformed than adjacent plains materials, largely by extensional deformation. Mean elevation is -180 m. Embayed by units pr1, pr2, pr3. Type locality: lat 48.0°N, long 205.0°E. Interpretation: older volcanic material that appears to originate from a nearby corona, largely preserved as kipukas within younger plains materials."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,204,153,255],"outline":null},"value":"corona rim","label":"Corona rim material (co)","description":"Corona rim material (co)—Material with intermediate radar backscatter (-15.69 dB mean), covering 34.1 x 103 km2 in the northeastern portion of the quadrangle. Characterized by lightly mottled texture at small scales. Deformed by both extensional and compressional deformation. Mean elevation of +80 m, but relief extends up to 1 km or more above adjacent areas. Embayed by pr2, ps and cof. Type locality: lat 49.0°N, long 205.5°E. Interpretation: older volcanic plains, preserved only along the uplifted rim of the younger Cerridwen and Neyterkob coronae. Based on deformation and physical characteristics, may be similar in age/origin to units pr1 and pl."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[235,235,0,255],"outline":null},"value":"impact crater","label":"Crater material, undifferentiated (c)","description":"Crater material, undifferentiated (c)—Material with high radar backscatter (-13.24 dB mean), covering 20.2 x 103 km2 at numerous locations across the quadrangle. Characterized by hummocky textures and irregular margins that together define the crater rim, interior walls and floor, and ejecta. Often associated with low radar backscatter materials that mantle the surrounding region. Mean elevation -340 m. Largely superimposed upon units pr2 and pr3. Type locality: lat 48.3°N, long 195.3°E. Interpretation: deposits and structures created by hypervelocity meteorite impact."},{"symbol":{"type":"esriSFS","style":"esriSFSSolid","color":[204,204,0,255],"outline":null},"value":"crater deposit","label":"Crater flow material (cf)","description":"Crater flow material (cf)—Material with very low radar backscatter (-20.52 dB mean; lowest of all material units in V-14), covering 9.86 x 103 km2 at one location within the quadrangle. Characterized by a sheet-like geometry and arcuate, sharply-defined margins; surrounds unit c. Mean elevation -130 m. May mantle unit pr2. Type locality: lat 48.3°N, long 195.3°E. Interpretation: fine fraction flow deposits associated with the formation of crater Yablochkina."}],"fieldDelimiter":";"},"scaleSymbols":true,"transparency":50,"labelingInfo":null}
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Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field: unit_type

Fields:

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unit_type (type: esriFieldTypeString, alias: unit_type, SQL Type: sqlTypeOther, length: 25, nullable: true, editable: true)
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UnitGroup (type: esriFieldTypeString, alias: Unit Group, SQL Type: sqlTypeOther, length: 1000, nullable: true, editable: true)
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Types:

unit_type: deformation belt

unit_type: tessera

unit_type: homogeneous plains

unit_type: shield plains

unit_type: Lahevhev hummocky plains

unit_type: Lahevhev lineated plains

unit_type: Ganis Chasma plains

unit_type: lineated plains

unit_type: regional plains, 3

unit_type: regional plains, 2

unit_type: regional plains, 1

unit_type: volcano edifice flows

unit_type: corona flows

unit_type: corona rim

unit_type: impact crater

unit_type: crater deposit

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Last Edit Date: 11/14/2022 4:47:33 PM

Schema Last Edit Date: 11/14/2022 4:47:33 PM

Data Last Edit Date: 11/14/2022 4:47:33 PM

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