## GeMS validation of DAMAS2025.1.gdb

File written by GeMS_ValidateDatabase.py, version of 02/19/2025
Wed Dec 31 16:04:33 2025
Runtime parameters
Database path: \MD_2022_Damascus2025.1_1-2-submittal\MD_2022_Damascus2025.1_1-2\MD_2022_Damascus2025.1_1-2-database\DAMAS2025.1.gdb
Output directory: \MD_2022_Damascus2025.1_1-2-submittal
Metadata file: None
Check embedded metadata: False
Skip topology check: False
Refresh GeoMaterialDict: False
Delete extra rows in Glossary and DataSources: False
Compact GDB: True
This database is LEVEL 3 COMPLIANT.
Check Metadata option was skipped. Be sure to have prepared valid metadata and check this option to produce a complete report.
This file should be accompanied by Damascus.gdb-ValidationErrors.html and a metadata summary from mp in the same directory.
If this database will be submitted to the NGMDB, it also needs to be accompanied by a reviewed Geologic Names report that includes identification of any suggested modifications to Geolex. Use the Geologic Names Check tool to generate that report or provide other documentation of a review.
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### Contents

Compliance Criteria
Warnings
Content not specified in GeMS schema
Occurrence of MapUnits in DMU, feature datasets, or geopackage tables
Contents of Nonspatial Tables
DataSources
DescriptionOfMapUnits
Glossary
Database Inventory

### Compliance Criteria

#### LEVEL 1

Criteria for a LEVEL 1 GeMS database are:

- No overlaps or internal gaps in map-unit polygon layer
- Contacts and faults in single feature class
- Map-unit polygon boundaries are covered by contacts and faults lines

Databases with a variety of schema may meet these criteria. This script cannot confirm LEVEL 1 compliance.

#### LEVEL 2--MINIMALLY COMPLIANT

A LEVEL 2 GeMS database is accompanied by a peer-reviewed Geologic Names report, including identification of suggested modifications to Geolex, and meets the following criteria:

2.1 Has required elements: nonspatial tables DataSources, DescriptionOfMapUnits, GeoMaterialDict; feature dataset GeologicMap with feature classes ContactsAndFaults and MapUnitPolys | PASS
2.2 Required fields within required elements are present and correctly defined | PASS
2.3 All MapUnitPolys and ContactsAndFaults based feature classes obey Level 2 topology rules: no internal gaps or overlaps in MapUnitPolys, boundaries of MapUnitPolys are covered by ContactsAndFaults | PASS
2.4 All map units in MapUnitPolys have entries in DescriptionOfMapUnits table | PASS
2.5 No duplicate MapUnit values in DescriptionOfMapUnit table | PASS
2.6 Certain field values within required elements have entries in Glossary table | PASS
2.7 No duplicate Term values in Glossary table | PASS
2.8 All xxxSourceID values in required elements have entries in DataSources table | PASS
2.9 No duplicate DataSources_ID values in DataSources table | PASS

#### LEVEL 3--FULLY COMPLIANT

A LEVEL 3 GeMS database meets these additional criteria:

3.1 Table and field definitions beyond Level 2 conform to GeMS schema | PASS
3.2 All MapUnitPolys and ContactsAndFaults based feature classes obey Level 3 topology rules: No ContactsAndFaults overlaps, self-overlaps, or self-intersections. | PASS
3.3 No missing required values | PASS
3.4 No missing terms in Glossary | PASS
3.5 No unnecessary terms in Glossary | PASS
3.6 No missing sources in DataSources | PASS
3.7 No unnecessary sources in DataSources | PASS
3.8 No map units without entries in DescriptionOfMapUnits | PASS
3.9 No unnecessary map units in DescriptionOfMapUnits | PASS
3.10 HierarchyKey values in DescriptionOfMapUnits are unique and well formed | PASS
3.11 All values of GeoMaterial are defined in GeoMaterialDict. GeoMaterialDict is as specified in the GeMS standard | PASS
3.12 No duplicate _ID values | PASS
3.13 No zero-length, whitespace-only, or bad null values | PASS

### Warnings

There are 0 warnings

### Content not specified in GeMS schema

Some of the extensions to the GeMS schema identified here may be necessary to capture geologic content and are entirely appropriate. Please document these extensions in metadata for the database, any accompanying README file, and (if applicable) any transmittal letter that accompanies the dataset. Other extensions may be intermediate datasets, fields, or files that should be deleted before distribution of the database.

#### Fields

SamplePoints, FieldSampleID
OrientationPoints_Display, OrientationPointsAllID

#### Tables

SamplePoints

### Occurrence of MapUnit in DMU, feature datasets, or geopackage tables

MapUnit | DescriptionOfMapUnits | GeologicMap
--- | --- | ---
CZscp | X | X
CZmbq | X | X
CZmbp | X | X
CZscb | X | X
CZmg | X | X
Jd | X | X
Qal | X | X
CZOq | X | X
CZmbg | X | X
CZmgs | X | X
CZum | X | X
CZmbs | X | X
CZmbcp | X | X
CZi | X | X

### Contents of Nonspatial Tables

#### DataSources

OBJECTID | Source | Notes | URL | DataSources_ID
--- | --- | --- | --- | ---
6 | Neuendorf et al., eds., 2011 | modified from Neuendorf, K.K.E., Mehl Jr., J.P., and Jackson, J.A., eds. 2011. Glossary of Geology (Fifth Edition, Revised). Alexandria, VA. American Geological Institute. 783 p. | https://www.americangeosciences.org/pubs/glossary | AGI_2011
5 | FGDC, 2006 | Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates. | https://ngmdb.usgs.gov/fgdc_gds/geolsymstd.php | FGDC-STD-013-2006
4 | definitions copied from GeMS, 2020 | U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)—A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p., https://doi.org//10.3133/tm11B10. | https://pubs.usgs.gov/publication/tm11B10 | GeMS_2020
19 | Wintsch et al., 2010 | Wintsch, R.P., Kunk, M.J., Mulvey, B.K., and Southworth, C.S., 2010, 40Ar/39Ar dating of Silurian and Late Devonian cleavages in lower greenschist-facies rocks in the Westminster terrane, Maryland, USA: Geological Society of America Bulletin, v. 122, no. 5–6, p. 658–677. | https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/122/5-6/658/125487/40Ar-39Ar-dating-of-Silurian-and-Late-Devonian?redirectedFrom=fulltext | GSA_Bull_v122_658
18 | Krol et al., 1999 | Krol, M.A., Muller, P.D., and Idleman, B.D., 1999, Late Paleozoic defor- mation within the Pleasant Grove shear zone, Maryland: Results from 40Ar/39Ar dating of white mica, in Valentino, D.W., and Gates, A.E., eds., The Mid-Atlantic Piedmont: Tectonic Missing Link of the Appalachians: Geological Soc | https://pubs.geoscienceworld.org/gsa/books/edited-volume/475/chapter-abstract/3799965/Late-Paleozoic-deformation-within-the-Pleasant?redirectedFrom=fulltext | GSA_SP_330_93
15 | Meyer and Beall, 1958 | Meyer, G., and Beall, R.M., 1958, The water resources of Carroll and Frederick Counties: Maryland Department of Geology, Mines, and Water Resources, Bulletin 22, 355 p. | http://www.mgs.md.gov/publications/reports.html | MGS_Bull_22
10 | Jonas, 1928 | Jonas, A.I., 1928, Map of Carroll County showing the geological formations: Maryland Geological Survey, scale 1:62,500. | https://ngmdb.usgs.gov/Prodesc/proddesc_90331.htm | MGS_CLGEO1928
16 | Stose and Stose, 1946 | Stose, A.J., and Stose, G.W., 1946, Geology of Carroll and Frederick Counties, in The Physical Features of Carroll County and Frederick County: Maryland Department of Geology, Mines, and Water Resources, p. 11-131. | http://www.mgs.md.gov/publications/report_pages/County_Reports.html | MGS_CR_CLFR1946
1 | Kavage Adams, 2025 | this report | http://www.mgs.md.gov/publications/maps.html | MGS_DAMAS2025.1
21 | Muller, 1994 | Muller, P.D., 1994, Geologic map of the Finksburg Quadrangle, Carroll and Baltimore Counties: Maryland Geological Survey, scale 1:24,000. | http://www.mgs.md.gov/publications/maps.html | MGS_FINKS1994
12 | Jonas and Stose, 1938 | Jonas, A.I., and Stose, G.W., 1938a. Geologic map of Frederick County and adjacent parts of Washington and Carroll Counties: Maryland Geological Survey, scale 1:62,500. | https://ngmdb.usgs.gov/Prodesc/proddesc_90332.htm | MGS_FRWACL1938
11 | Cloos, et al., 1964 | Cloos, E., Fisher, G. W., Hopson, C. A., and Cleaves, E. T., 1964, The geology of Howard and Montgomery Counties: Maryland Geological Survey, 373p. | http://www.mgs.md.gov/publications/report_pages/County_Reports.html | MGS_HOWMO1964
17 | Brezinski and Kavage Adams, 2023 | Brezinski, D.K., and Kavage Adams, R., 2023. Geologic Map of the Libertytown Quadrangle, Frederick and Carroll Counties, Maryland. Maryland Geological Survey, Quadrangle Geologic Map, LIBER2023.OF, scale 1:24,000. | http://www.mgs.md.gov/publications/maps.html | MGS_LIBER2023.OF
8 | Cloos, 1953 | Cloos, E., and Cooke, C.W., 1953, Geologic map of Montgomery County and the District of Columbia: Maryland Department of Geology, Mines and Water Resources, scale 1:62,500. | http://www.mgs.md.gov/publications/maps.html | MGS_MODC1953
2 | Kavage Adams, R., field observations | Kavage Adams, R., field data collection and interpretations | None | MGS_RKA
3 | Vincett III, W.K., field observations | Vincett III, W.K., field data collection and interpretations | None | MGS_WKV
20 | Krol and Muller, 1995 | Krol, M.A., and Muller, P.D., 1995, Microstructural evidence for dextral shearing within the Pleasant Grove Zone, Maryland: Northeastern Geology and Environmental Sciences, v. 17, no. 2, p. 151-161. | None | NEGEOENV_v17_151
22 | Pearre and Heyl, 1960 | Pearre, N.C., and Heyl, A.V., 1960, Chromite and other mineral deposits in serpentine rocks of the Piedmont upland, Maryland, Pennsylvania, and Delaware: U.S.Geological Survey Bulletin 1082-K, p. 707-833, plate 40, scale 1:125,000. | https://pubs.usgs.gov/publication/b1082K | USGS_Bull_1082K_707
14 | Southworth, 1999 | Southworth, S., 1999, Geologic map of the Urbana quadrangle, Frederick and Montgomery Counties, Maryland: U.S. Geological Survey Geologic Quadrangle Map GQ-1768, scale 1:24,000. | https://pubs.usgs.gov/publication/gq1768 | USGS_GQ_1768
9 | Froelich, 1975 | Froelich, A.J., 1975, Map showing mineral resources of Montgomery County, Maryland: U.S. Geological Survey Miscellaneous Investigations Series, Map I-920-E, scale 1:62,500. | https://pubs.usgs.gov/publication/i920E | USGS_IMAP920_MO1975
13 | Meyer, 1955 | Meyer, G., 1955, Test drilling and aquifer test in the Marburg schist near Mount Airy, Frederick County, Maryland: U.S. Geological Survey Open-File Report 55-110, 31 p. | https://pubs.usgs.gov/publication/ofr55110 | USGS_OFR_55-110
7 | Southworth et al, 2008 | Southworth, S., Brezinski, D.K., Drake, A.A., Burton, W.C., Omdorff, R.C., Froelich, A.J., Reddy, J.E., Denenny, D., and Daniels, D.L., 2008, Geologic map of the Frederick 30' x 60' quadrangle, Maryland, Virginia, and West Virginia: U.S. Geological Survey Scientific Investigations Map SIM-2889, scal | https://pubs.usgs.gov/sim/2889/ | USGS_SIM_2889_FREDERICK

#### DescriptionOfMapUnits

OBJECTID | MapUnit | Name | FullName | Age | Description | HierarchyKey | ParagraphStyle | Label | Symbol | AreaFillRGB | AreaFillPatternDescription | DescriptionSourceID | GeoMaterial | GeoMaterialConfidence | DescriptionOfMapUnits_ID
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
2 | Qal | Alluvium | Alluvium | Quarternary | Poorly- to well-sorted, stratified mixtures of unconsolidated clay, silt, sand, gravel, and cobbles underlying flood plains of nearly all rivers and tributaries. Channels of tributaries are commonly incised into bedrock with alluvium covering and exposed along the banks. Thickness of alluvium is highly variable, and is a function of bedrock, topography, and land-use practices. Locally, thick deposits of alluvium result from accumulation of soil eroded due to agricultural practices of the 19th century (Southworth et al., 2008). Notably thick (>7 ft) and laterally extensive (>400 ft wide) deposits of alluvium are present in Cabin Branch and Kings Valley. | 01-01 | DMU Unit 1 | Qal | 40 | 255,255,179 | None | MGS_DAMAS2025.1|USGS_SIM_2889_FREDERICK | Alluvial sediment | High | DMU01
3 | Jd | Diabase dikes and sills | Diabase dikes and sills | Jurassic | Medium to dark gray, medium-grained crystalline and equigranular, massive diabase that weathers to characteristic rusty orange-brown surface and rounded boulders. One linear dike from south of Damascus to northeast of Mount Airy mapped on presence of rounded boulders in stream valleys and previous maps (Cloos and Cooke, 1953; Froelich, 1975; Jonas, 1928; Stose and Stose, 1946). | 02-01 | DMU Unit 1 | Jd | 99 | 255,000,000 | None | MGS_DAMAS2025.1|MGS_MODC1953|USGS_IMAP920_MO1975|MGS_CLGEO1928|MGS_CR_CLFR1946 | Coarse-grained, mafic-composition intrusive igneous rock | High | DMU02
4 | CZOq | Quartz bodies | Quartz bodies | Proterozoic-Ordovician | White, massive, and intensely fractured irregular bodies of quartz. The largest, Annapolis Rock, is over 100 feet thick and was once quarried (Cloos et al., 1964). It occurs just east of the Pautuxent River in the Mather Gorge Formation. Four other smaller (6-12 ft thick) quartz bodies are found in the Marburg Formation. | 03-01 | DMU Unit 1 | _ZOq | 179 | 235,000,102 | None | MGS_DAMAS2025.1|MGS_HOWMO1964 | Quartzite | Low | DMU03
5 | None | Sams Creek Formation | Sams Creek Formation | None | None | 04 | DMU-Heading1 | None | None | None | None | MGS_DAMAS2025.1 | None | None | DMU04
6 | CZscb | Sams Creek Formation, metabasalt | Sams Creek Formation, metabasalt | Proterozoic-Cambrian | Greenish gray to medium bluish gray, aphanitic to porphyritic, massive to schistose metabasalt. Includes some breccia composed of angular, fine-grained, dusky blue clasts in fractured green basalt matrix, as well as interlaminated, fine-grained, dark bluish gray and greenish gray metabasalt and white calcite amygdules. Metabasalt is mapped based on float found just northeast of the map area on the Libertytown quadrangle. | 04-01 | DMU Unit 1 | _Zscb | 344 | 204,179,179 | None | MGS_DAMAS2025.1 | Meta-mafic rock | High | DMU05
7 | CZscp | Sams Creek Formation, phyllite | Sams Creek Formation, phyllite | Proterozoic-Cambrian | Grayish purple, grayish blue, and dark greenish gray phyllite containing white vein quartz and minor slate. No exposures were found on the Damascus Quadrangle; it is mapped based on Libertytown Quadrangle exposures (Jonas and Stose, 1938; Meyer, 1955; Southworth, 1999). | 04-02 | DMU Unit 1 | _Zscp | 153 | 235,204,153 | None | MGS_DAMAS2025.1|MGS_FRWACL1938|USGS_OFR_55-110|USGS_GQ_1768 | Meta-felsic and intermediate rock | High | DMU06
8 | CZi | Ijamsville Phyllite, undifferentiated | Ijamsville Phyllite, undifferentiated | Proterozoic-Cambrian | Grayish purple, grayish blue, and dark greenish gray phyllite containing white vein quartz and minor slate. Folded and sheared with abundant quartz veins near the Hyattstown fault. No exposures were found on the Damascus Quadrangle; it is mapped based on Libertytown Quadrangle exposures (Brezinski and Kavage Adams, 2023). | 05 | DMU Unit 1 | _Zi | 312 | 204,222,235 | None | MGS_DAMAS2025.1|MGS_LIBER2023.OF | Meta-felsic and intermediate rock | High | DMU07
9 | None | Marburg Formation | Marburg Formation | None | None | 06 | DMU-Heading1 | None | None | None | None | MGS_DAMAS2025.1 | None | None | DMU08
10 | CZmbp | Marburg Formation, phyllite | Marburg Formation, phyllite | Proterozoic-Cambrian | Silvery light gray to grayish purple, lustrous, tan-weathering, muscovite-chlorite phyllite interlayered with greenish gray metasiltstone. Coarsens gradationally to the east with corresponding decrease in luster. | 06-01 | DMU Unit 1 | _Zmbp | 242 | 222,222,179 | None | MGS_DAMAS2025.1 | Slate and phyllite, of sedimentary-rock origin | High | DMU09
11 | CZmbs | Marburg Formation, metasiltstone | Marburg Formation, metasiltstone | Proterozoic-Cambrian | Medium to dark greenish gray metasiltstone interlayered with quartz-paragonite-muscovite-chlorite phyllite. Chloritic laminae commonly alternate with mica-albite-quartz layers. Locally, intervals of dark grayish blue to dark grayish purple phyllite with light gray, quartz-rich layers occur, containing minute (>0.01mm) disseminated flakes of hematite and pyrite. Much of the apparent layering is clearly metamorphic cleavage, but some may be relict bedding. | 06-02 | DMU Unit 1 | _Zmbs | 263 | 222,204,128 | None | MGS_DAMAS2025.1 | Slate and phyllite, of sedimentary-rock origin | High | DMU10
12 | CZmbq | Marburg Formation, quartzite | Marburg Formation, quartzite | Proterozoic-Cambrian | Light to medium olive gray, medium- to coarse-grained quartzite. Can be foliated, blocky, or massive. Massive intervals are up to 3 feet thick and comprised of subrounded quartz grains in a foliated, fine-grained, recrystallized quartz and mica matrix. Coarse grains of quartz appear bluish in hand sample and euhedral limonite pseudomorphs after pyrite are occasionally present. | 06-03 | DMU Unit 1 | _Zmbq | 404 | 179,179,255 | None | MGS_DAMAS2025.1 | Quartzite | High | DMU11
13 | CZmbg | Marburg Formation, metagraywacke | Marburg Formation, metagraywacke | Proterozoic-Cambrian | Dark grayish green, foliated metagraywacke comprised of very fine- to fine-grained quartz and plagioclase grains in a chlorite-rich matrix. The largest of these bodies occurs west of Mount Airy. In this location, dark green layers of metagraywacke are divided by 1-3 mm-thick, parallel bands of muscovite and chlorite, forming a crenulation cleavage that indicates compressional folding. | 06-04 | DMU Unit 1 | _Zmbg | 304 | 204,179,255 | None | MGS_DAMAS2025.1 | Quartzite | High | DMU12
14 | None | Marburg Formation, calcareous material | Marburg Formation, calcareous material | Proterozoic-Cambrian | Calcareous material found in bluish green schist in well cuttings at approximately 50-foot depth in a well field in Mount Airy (Meyer, 1955; Meyer and Beall, 1958). No surficial exposures were found on the Damascus Quadrangle, but may be related to limestone or marble associated with the Ijamsville Formation (Stose and Stose, 1946; Brezinski and Kavage Adams, 2023) or the Silver Run Limestone of the Sams Creek Formation (Stose and Stose, 1946; Fisher, 1978). | 06-05 | DMU Unit 2 | None | None | None | None | MGS_DAMAS2025.1|USGS_OFR_55-110|MGS_Bull_22|MGS_CR_CLFR1946|MGS_LIBER2023.OF | Meta-carbonate rock | Medium | DMU13
15 | CZmbcp | Marburg Formation, chlorite phyllonite | Marburg Formation, chlorite phyllonite | Proterozoic-Cambrian | Greenish gray, chlorite-sericite phyllonite containing white vein quartz. Foliation surfaces frequently have abundant euhedral magnetite grains ranging from 0.04 to 0.2 inch (1 to 5 mm) in size. 100- to 300-foot (30- to 90-m) wide zones of intense shear are exposed in NE-SW trending ridges cut by the Patuxent River and Scott Branch and marked with wavy lines as seen in lower half of symbol. Sheared outcrops display pervasive S-C shear fabric and thin (0.04- to 0.16-inch / 1- to 4-mm), linear, quartz ribbons that are often isoclinally folded. S-C shear bands on outcrop indicate dextral sense of shear. 40Ar/39Ar dating of white mica in this zone yielded ages of 348 and 363 mya, indicating late Devonian-Mississippian deformation (Krol et al., 1999; Wintsch et al., 2010). | 06-06 | DMU Unit 1 | _Zmbcp | 584 | 153,179,077 | None | MGS_DAMAS2025.1|GSA_SP_330_93|GSA_Bull_v122_658 | Slate and phyllite, of sedimentary-rock origin | High | DMU14
17 | CZmg | Mather Gorge Formation | Mather Gorge Formation | Proterozoic-Cambrian | Quartz-mica schist and quartzitic metagraywacke interbedded in layers and lenses on a millimeter to meter scale. Quartz-muscovite-chlorite-plagioclase-epidote-magnetite-garnet schist is fine-grained, lustrous greenish gray to gray. Metagraywacke is light to dark olive gray, fine- to medium-grained, with quartz pebbles and graded bedding occasionally visible. Stringers and pods of isoclinally folded and boudinaged white quartz veins are abundant. | 07 | DMU-Heading1 | _Zmg | 185 | 235,153,077 | None | MGS_DAMAS2025.1 | Schist and gneiss, of sedimentary-rock origin | High | DMU15
18 | CZmgs | Mather Gorge Formation, sheared | Mather Gorge Formation, sheared | Proterozoic-Cambrian | Interbedded quartz-mica schist and quartzitic metagraywacke with penetrative S-C metamorphic fabric, formed by the intersection of the dominant foliation (S) and the shear plane (C) near the Pleasant Grove Fault (Krol and Muller, 1995; Muller, 1994). Mapped on distinct appearance of rotated foliation although lithologically is similar to _Zmg. | 07-01 | DMU Unit 1 | _Zmgs | 184 | 235,179,077 | None | MGS_DAMAS2025.1|NEGEOENV_v17_151|MGS_FINKS1994 | Schist and gneiss, of sedimentary-rock origin | High | DMU16
19 | CZum | Ultramafic and mafic rocks | Ultramafic and mafic rocks | Proterozoic-Cambrian | Undifferentiated serpentine, magnesian schist, and metagabbro that occur within rocks of the Mather Gorge Formation. The core of the largest body is comprised of light gray to light greenish gray, magnesite-talc schist with yellow, native sulfur and dark green bodies of serpentinite with a distinctive, rounded, fractured weathering surface. Surrounding this body is fine- to coarse-grained actinolite, chlorite, and epidote schist containing 5-30 mm euhedral porphryoblasts of magnesite, chlorite, and magnetite. A second smaller body is mapped based on mine records and previous maps (Froelich, 1975; Pearre and Heyl, 1960), although no outcrop is presently visible at the surface. | 07-02 | DMU Unit 1 | _Zum | 442 | 179,222,179 | None | MGS_DAMAS2025.1|USGS_IMAP920_MO1975|USGS_Bull_1082K_707 | Meta-ultramafic rock | High | DMU17

#### Glossary

OBJECTID | Term | Definition | DefinitionSourceID | Glossary_ID
--- | --- | --- | --- | ---
15 | bedding | Formed, arranged, or deposited in layers or beds, or made up of or occurring in the form of beds; esp. said of a layered sedimentary rock, deposit, or formation. The term has also been applied to nonsedimentary material that exhibits depositional layering, such as the "bedded deposits" of volcanic tuff alternating with lava in the mantle of a stratovolcano. | AGI_2011 | GLO12
1 | certain | Identity of a feature can be determined using relevant observations and scientific judgment; therefore, one can be reasonably confident in the credibility of this interpretation. | FGDC-STD-013-2006 | GLO01
16 | cleavage | A locally planar fabric in an unmetamorphosed or weakly metamorphosed, fine-grained rock defined by either the tendency of a rock to split in a particular direction, a preferred orientation of crystal planes in mineral grains, or a preferred orientation of inequant grain shapes; it is a product of deformation or metamorphism. | AGI_2011 | GLO13
14 | contact | A plane or irregular surface between two different types or ages of rock, sediment or other geologic and stratigraphic units. | AGI_2011 | GLO11
12 | cross section line | A plane or polyline along which a diagram is drawn showing the transected subsurface and topographic features and geology; specifically a vertical section drawn at right angles to the longer axis of a geologic feature. | AGI_2011 | GLO10
10 | DMU-Heading1 | Header, bolded text, all capitals no indent, 11pt Times New Roman font, 5pt indent. This format is used for groups or headings of formations (with members or subunits) where no group is present. | MGS_DAMAS2025.1 | GLO08
8 | DMU Unit 1 | Formation style, bolded title, 11pt Times New Roman font. This format is used for largest unit descriptions, usually formations; mapped at the surface, and may or may not contain subunits. | MGS_DAMAS2025.1 | GLO06
9 | DMU Unit 2 | Minor lithology style. Text description within higher-order units, 11 pt Times New Roman font, italicized for subsurface-only units. | MGS_DAMAS2025.1 | GLO07
17 | fault | A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other. | AGI_2011 | GLO14
20 | fold axis | A line which, when moved parallel to itself, traces out a folded surface. It applies only in the case of cylindrical folds. | AGI_2011 | GLO17
21 | foliation | A general term for a planar arrangement of textural or structural geatures in any type of rock, esp. the locally planar fabric in a rock defined by a fissility, a preferred orientation of crystal planes in mineral grains, a preferred orientation of inequant grain shapes, or from compositional banding. In igneous rocks, planar parallelism of flaky or tabular minerals and mineral aggregates, slabby xenoliths, or flattened vesicles as well as compositional layering. In metamorphic rocks, planar parallelism of flaky minerals and compositional layering. | AGI_2011 | GLO18
3 | High | The selected term in the GeoMaterial field (and its definition) adequately characterizes the overall lithologic nature of rocks and (or) sediments in the map unit. | GeMS_2020 | GLO03
22 | joint | A planar fracture, crack, or parting in a rock, without shear displacement. | AGI_2011 | GLO19
23 | lineation | A general, nongeneric term for a locally linear structure or facric in a rock, e.g. flow lines, scratches, striae, slickensides or slickenfibers on a single surface; linear arrangements of components in sediments; or axes of folds. Lineation in metamorphic rocks includes aligned rod-shaped and/or elongate mineral grains, crenulation fold axes, and the lines of intersection between bedding and cleavage or any two sets of oriented surfaces. | AGI_2011 | GLO20
7 | Low | Either (1) the overall lithologic nature of rocks and (or) sediments in this map unit is not adequately classifiable using the available list of GeoMaterial terms (and their definitions), but the selected term is the best available, or (2) this map unit is not sufficiently known enough to confidently assign a GeoMaterial term. | GeMS_2020 | GLO05
4 | Medium | The selected term in the GeoMaterial field (and its definition) generally characterizes the overall lithologic nature of rocks and (or) sediments in the map unit, but one or more significant but minor lithologies are not adequately described by the selected term. | GeMS_2020 | GLO04
11 | neatline | Map Outline | MGS_DAMAS2025.1 | GLO09
2 | questionable | Identity of a feature cannot be determined using relevant observations and scientific judgment; therefore, one cannot be reasonably confident in the credibility of this interpretation. For example, IdentityConfidence = questionable is appropriate when a geologist reasons "I can see some kind of planar feature that separates map units in this outcrop, but I cannot be certain if it is a contact or a fault." | FGDC-STD-013-2006 | GLO02
25 | recreational GPS | Data collected using Apple iPad using GIS software such as ESRI Field Maps or IGIS with settings of 30 ft point accuracy. | MGS_DAMAS2025.1 | GLO22
18 | right lateral fault | A strike-slip fault on which the side opposite the observer has been displaced to the right. Synonym: dextral fault. The Pleasant Grove Fault, which is labeled as a right lateral fault on this map, is interpreted as an older potential thrust fault that has been reactivated as a strike-slip. The older potential thrust fault is referenced by vertical arrows on the cross section. | AGI_2011|MGS_DAMAS2025.1 | GLO15
26 | sample | Field collected piece or pieces of rock, weathered rock, saprolite, or soil sent for geochemical analysis. | MGS_DAMAS2025.1 | GLO23
24 | shear zone | A parallel-sided zone of localized shearing displacement, which may be recognized by sigmoidal mineral-filled veins, locally well-developed cleavage or foliation, wholesale grain-size reduction or mylonitization, or some combination of these features. | AGI_2011 | GLO21
19 | thrust fault | A fault with a dip of 45° or less over much of its extent, on which the hanging wall has moved upward relative to the footwall. | AGI_2011 | GLO16

### Database Inventory

This summary of database content is provided as a convenience to GIS analysts, reviewers, and others. It is not part of the GeMS compliance criteria.
DataSources, nonspatial table, 22 rows
DescriptionOfMapUnits, nonspatial table, 17 rows
GeoMaterialDict, nonspatial table, 101 rows
Glossary, nonspatial table, 23 rows
GeologicMap, feature dataset
SamplePoints, simple point feature class, 32 rows
MapUnitPolys, simple polygon feature class, 43 rows
MapUnitOverlayPolys, simple polygon feature class, 24 rows
OverlayPolys, simple polygon feature class, 6 rows
CartographicLines, simple polyline feature class, 1 rows
ContactsAndFaults, simple polyline feature class, 277 rows
Stations, simple point feature class, 621 rows
OrientationPoints_All, simple point feature class, 617 rows
OrientationPoints_Display, simple point feature class, 323 rows