OBJECTID,Glossary_ID,Term,Definition,DefinitionSourceID
1,GLO01,Breccia,"A coarse-grained clastic rock, composed of angular broken rock fragments held together by a mineral cement or in a fine-grained matrix",DAS10
2,GLO02,Certain,"The identity/existence/location/confidence of a geologic unit (MapUnitPolys), or line (ContactsAndFaults, GeologicLines), or description (DescriptionOfMapUnits>GeneralLithologyConfidence), is certain.",DAS10
3,GLO03,"Angular unconformity, locally tectonized","An unconformity between two groups of rocks whose bedding planes are not parallel or in which the older, underlying rocks dip at a different angle (usually steeper) than the younger, overlying strata; specif. an unconformity in which younger sediments rest upon the eroded surface of tilted or folded older rocks. Tectonization: A term sometimes used as a generalized synonym of orogenesis, diastrophism, etc. Thus, deformed rocks in orogenic belts are said to have been ""tectonized"".",DAS10
4,GLO04,"Angular unconformity, locally tectonized, approximate","An indefinitely-located unconformity between two groups of rocks whose bedding planes are not parallel or in which the older, underlying rocks dip at a different angle (usually steeper) than the younger, overlying strata; specif. an unconformity in which younger sediments rest upon the eroded surface of tilted or folded older rocks. Tectonization: A term sometimes used as a generalized synonym of orogenesis, diastrophism, etc. Thus, deformed rocks in orogenic belts are said to have been ""tectonized"".",DAS10
5,GLO05,"Angular unconformity, locally tectonized, concealed","A buried unconformity between two groups of rocks whose bedding planes are not parallel or in which the older, underlying rocks dip at a different angle (usually steeper) than the younger, overlying strata; specif. an unconformity in which younger sediments rest upon the eroded surface of tilted or folded older rocks. Tectonization: A term sometimes used as a generalized synonym of orogenesis, diastrophism, etc. Thus, deformed rocks in orogenic belts are said to have been ""tectonized"".",DAS10
6,GLO06,Contact,A plane or irregular surface between two types or ages of rock.,DAS10
7,GLO07,"Contact, concealed",A buried plane or irregular surface between two types or ages of rock.,DAS10
8,GLO08,Fault,A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other.,DAS10
9,GLO09,"Fault, normal","A fault in which the hanging wall has moved downward relative to the footwall. The angle of the fault is usually 45-90°, and in most cases close to 60°.",DAS10
10,GLO10,"Fault, normal, concealed","A buried fault in which the hanging wall has moved downward relative to the footwall. The angle of the fault is usually 45-90°, and in most cases close to 60°.",DAS10
11,GLO11,"Fault, normal, low-angle","A fault in which the hanging wall has moved downward relative to the footwall, and the dip of the fault is 45° or less.",DAS10
12,GLO12,"Fault, normal, low-angle, concealed","A buried fault in which the hanging wall has moved downward relative to the footwall, and the dip of the fault is 45° or less.",DAS10
13,GLO13,"Fault, reactivated","A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other, and which has experienced a subsequent period of slippage after initial formation.",DAS10
14,GLO14,"Fault, reactivated, concealed","A buried discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other, and which has experienced a subsequent period of slippage after initial formation.",DAS10
15,GLO15,"Fault, thrust","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.",DAS10
16,GLO16,"Fault, thrust, concealed","A buried 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.",DAS10
17,GLO17,"Fault, complex movment, certain",A term used for a continental strike-slip fault that does not terminate at plate boundaries.,DAS10
18,GLO18,"Fault, complex movement, concealed",A term used for a buried continental strike-slip fault that does not terminate at plate boundaries.,DAS10
19,GLO19,Map boundary,A line of demarcation between the mapped data and surrounding areas.,DAS10
20,GLO20,Approximate,The identity/existence/location of a geologic unit or line is indefinite.,DAS10
21,GLO21,Concealed,The identity/existence/location of a geologic unit or line is buried and/or not evident on the ground surface.,DAS10
23,GLO23,"Alluvial sediment, mostly coarse-grained","Unconsolidated material deposited by a stream or other body of running water, as a sorted or semi-sorted sediment in the bed of the stream or on its floodplain or delta, or as a cone or fan at the base of a mountain slope.  This sediment is mostly sand and gravel, but may contain some mud and/or cobbles and boulders.",DAS10
24,GLO24,Carbonate sediment,"A sediment formed by the biotic or abiotic precipitation from aqueous solution of carbonates of calcium, magnesium, or iron;  e.g., limestone and dolomite.",DAS10
25,GLO25,Clastic sedimentary rock,"Sedimentary rock that is composed dominantly of particles or ""clasts"" derived by erosion, weathering, or mass-wasting of preexisting rock, and deposited by gravity, air, water, or ice.",DAS10
26,GLO26,"Coarse-grained, felsic-composition intrusive igneous rock","Rock that solidified from molten or partly molten material (i.e., magma).  It formed at some depth beneath the Earth's surface, thereby cooling slowly enough for mineral crystals to grow to a size large enough to be visible to the naked eye.  Composed mostly of light-colored minerals.  Includes granitic, syenitic, and monzonitic rock.",DAS10
27,GLO27,Conglomerate,"Sedimentary rock that is composed dominantly of particles or ""clasts"" derived by erosion and weathering of preexisting rock, and containing more than 30 percent gravel-sized particles.",DAS10
28,GLO28,"Debris flows, landslides, and other localized mass-movement sediment","Formed by relatively localized downslope transport of particles or ""clasts"" produced by weathering and breakdown of the underlying rock, sediment, and/or soil.  Composed of poorly sorted and poorly stratified material ranging in size from clay to boulders.  Commonly, the slopes on which this material occurs fail because of water, earthquake, or volcanic activity, and this material is then transported and deposited downslope.  The speed of sediment transport ranges from rapid to imperceptible.",DAS10
29,GLO29,Fine-grained sandstone with quartzite,"Sandstone, a sedimentary rock that is composed dominantly of particles or ""clasts"" derived by erosion and weathering of preexisting rock, consisting mostly of sand-sized particles, with or without a fine-grained matrix of silt or clay, with quartzite, a rock derived from preexisting (commonly sandstone) sedimentary rocks by mineralogical, chemical, or structural changes, essentially in the solid state, in response to marked changes in temperature, pressure, shearing stress, and chemical environment, generally at depth in the Earth's crust.  Characterized by recrystallization of quartz in the source rock.
",DAS10
30,GLO30,"Fine-grained, felsic-composition intrusive igneous rock","Rock that solidified from molten or partly molten material (i.e., magma).  It formed at shallow depths beneath the Earth's surface, thereby cooling quickly.  These rocks generally are fine-grained, but may contain large mineral crystals (phenocrysts), and they occur as tabular dikes or sills.  Composed mostly of light-colored minerals.  Includes rhyolitic, dacitic, trachytic, and latitic rock.",DAS10
31,GLO31,"Fine-grained, mafic-composition intrusive igneous rock Fine-grained, mafic-composition intrusive igneous rock","Rock that solidified from molten or partly molten material (i.e., magma).  It formed at shallow depths beneath the Earth's surface, thereby cooling quickly.  These rocks generally are fine-grained, but may contain large mineral crystals (phenocrysts), and they occur as tabular dikes or sills.  Composed mostly of dark-colored minerals.  Includes basaltic rock.",DAS10
32,GLO32,"Ice-contact and ice-marginal sediment, mostly coarse-grained","Mostly sand and gravel-sized particles or ""clasts,"" with lesser silt and clay, derived from rock or preexisting sediment eroded and transported by glaciers.  As the ice melted, this material was deposited by running water essentially in contact with glacial ice, or was transported and deposited by glacially fed streams.  Includes sediment deposited into water bodies adjacent to the glacial ice margin.
Mostly sand and gravel-sized particles or ""clasts,"" with lesser silt and clay, derived from rock or preexisting sediment eroded and transported by glaciers.  As the ice melted, this material was deposited by running water essentially in contact with glacial ice, or was transported and deposited by glacially fed streams.  Includes sediment deposited into water bodies adjacent to the glacial ice margin.
",DAS10
33,GLO33,"Marine sediment, mostly fine-grained","Mostly clay- and silt-sized sediment deposited in relatively deep, quiet water, far removed from areas where coarser grained clastic sediments are washed into the marine environment.   Includes sediment derived from marine organisms.",DAS10
34,GLO34,Metasedimentary rock,"A rock derived from preexisting sedimentary rocks by mineralogical, chemical, or structural changes, essentially in the solid state, in response to marked changes in temperature, pressure, shearing stress, and chemical environment, generally at depth in the Earth's crust.",DAS10
35,GLO35,"Mostly carbonate rock, interbedded with clastic sedimentary rock","A sedimentary rock such as limestone or dolomite, consisting chiefly of carbonate minerals, interbedded with a sediment formed by the weathering and erosion of preexisting rocks or minerals; the eroded particles or ""clasts"" are transported and deposited by gravity, air, water, or ice.
",DAS10
36,GLO36,"Mostly mudstone, interbedded with other sedimentary rocks which locally may include coarser grained clastics (sandstone, conglomerate), carbonates, and/or coal","Mudstone, a sedimentary rock that is composed dominantly of particles or ""clasts"" derived by erosion and weathering of preexisting rock, consisting mostly of mud (silt- and clay-sized particles).  Includes shale and siltstone. Interbedded with sedimentary rock that is composed dominantly of particles or ""clasts"" derived by erosion, weathering, or mass-wasting of preexisting rock, and deposited by gravity, air, water, or ice; carbonates, sedimentary rock such as limestone or dolomite, consisting chiefly of carbonate minerals; or coal, organic rich sedimentary rock formed from the compaction and alteration of plant remains. Coal is a consolidated, hard black organic rock, whereas lignite is a semiconsolidated brown to black, earthy material, which may contain large particles of recognizable plant parts and tends to crack upon drying. ",DAS10
37,GLO37,Quartzite,"A rock derived from preexisting (commonly sandstone) sedimentary rocks by mineralogical, chemical, or structural changes, essentially in the solid state, in response to marked changes in temperature, pressure, shearing stress, and chemical environment, generally at depth in the Earth's crust.  Characterized by recrystallization of quartz in the source rock.",DAS10
38,GLO38,"Schist and gneiss, of sedimentary rock origin Metaigneous rock","A foliated rock derived from preexisting sedimentary rocks by mineralogical, chemical, or structural changes, essentially in the solid state, in response to marked changes in temperature, pressure, shearing stress, and chemical environment, generally at depth in the Earth's crust.  Includes schist (characterized by such strong foliation or alignment of minerals that it readily splits into flakes or slabs) and gneiss (characterized by alternating, irregular bands of different mineral composition).  Mostly formed from fine-grained material such as mudstone.",DAS10
39,GLO39,Bedding,"The arrangement of sedimentary rocks in beds or layers of varying thickness and character; the general physical and structural character or pattern of the beds and their contacts within a rock mass, such as cross-bedding and graded bedding; a collective term denoting the existence of beds. Also, the structure so produced. The term may be applied to the layered arrangement and structure of an igneous or metamorphic rock.",DAS10
40,GLO40,"Bedding, overturned",Bedding inclined to the principal surface of deposition that has tilted beyond the perpendicular. Sequence of strata thus appears reversed.,DAS10
41,GLO41,"Bedding, upright",Bedding inclined to the principal surface of deposition that has tilted vertical.,DAS10
43,GLO43,"Fold axis, plunging, open","A line which, when moved parallel to itself, traces out a folded surface of a fold of which the hinge line is inclined to the horizontal, with an inter-limb angle between 70° and 120°.",DAS10
44,GLO44,"Fold axis, plunging, s shape","A line which, when moved parallel to itself, traces out a folded surface of an asymmetric fold of which the hinge line is inclined to the horizontal, and with an s-shaped sense of shear.",DAS10
45,GLO45,"Fold axis, plunging, z shape","A line which, when moved parallel to itself, traces out a folded surface of an asymmetric fold of which the hinge line is inclined to the horizontal, and with a z-shaped sense of shear.",DAS10
46,GLO46,Foliation,"A general term for a planar arrangement of textural or structural features 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.",DAS10
47,GLO47,"Foliation, axial plane",Foliation of rocks in an an axial plane (axial surface that is planar).,DAS10
48,GLO48,"Foliation, cleavage","Foliation of rocks in a 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.)",DAS10
49,GLO49,"Foliation, fault",Foliation of rocks in a fault.,DAS10
50,GLO50,"Foliation, flow","Foliation of rocks in a flow of unconsolidated material (a flow is a mass movement of that exhibits a continuity of motion and a plastic or semifluid behavior resembling that of a viscous fluid), or igneous rock (a flow is a discrete, extrusive, volcanic body distinguishable by texture, composition, order of superposition, paleomagnetism, or other objective criteria.)",DAS10
51,GLO51,"Foliation, vein",Foliation of rocks that are in a vein (Any fracture that contains mineralized material. Veins can display either crack-normal extension or shear displacement coupled with crack-normal extension.),DAS10
52,GLO52,Linear element,A fabric element having one dimension that is much greater than the other two. Mineral lineations are common linear elements.,DAS10
53,GLO53,"Lineation, mineral",A linear fabric element defined by the preferred orientation of inequant mineral grains (e.g. prismatic grains of horneblende) or elongated grain aggregates.,DAS10
54,GLO54,"Lineation, slickenside","Lineation of a slickenside (Originally, a polished fault surface formed by frictional wear during sliding, but now used to denote any of several types of lineated fault surfaces. Slickensides commonly have groove lineations, or alternatively may have fibrous minerals; in both cases, the lineations indicate the direction of slip on the fault.)",DAS10
55,GLO55,Shear zone axis,Measured axis of a shear zone (a tabular zone of rock that has been brecciated by many parallel fractures; such an area is often mineralized by ore-forming solutions.),DAS10
56,GLO56,Calculated,Latitude and longitude coordinates of stations and orientation points have been converted from original field map projections into NAD83 UTM zone 12N.,DAS10
57,GLO57,Anticline,"A fold, generally convex upward, whose core contains the stratigraphically older rocks.",DAS10
58,GLO58,"Anticline, overturned","An anticline, or the limb of ananticline, that has tilted beyond the perpendicular. Sequence of strata thus appears reversed.",DAS10
59,GLO59,"Anticline, overturned, concealed","A buried anticline, or the limb of a buried anticline, that has tilted beyond the perpendicular. Sequence of strata thus appears reversed.",DAS10
60,GLO60,Dike,A tabular igneous intrusion that cuts across the bedding or foliation of the country rock.,DAS10
61,GLO61,Syncline,A fold of which the core contains the stratigraphically younger rocks; it is generally concave upward.,DAS10
62,GLO62,"Syncline, concealed",A syncline which is buried.,DAS10
63,GLO63,"Syncline, overturned","A syncline, or the limb of a syncline, that has tilted beyond the perpendicular. Sequence of strata thus appears reversed.",DAS10
64,GLO64,Cross-section,"Ground trace of a cross-section (A diagram or drawing that shows features transected by a given plane; specif. a vertical section drawn at right angles to the longer axis of a geologic feature, such as the trend of an orebody, the mean direction of flow of a stream, or the axis of a fossil.)",DAS10
