Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-geol.aat
Entity_Type_Definition:
Arc attributes for coverage 'elm-geol' (Faults, depositional contacts, and rock units)
Attribute:
Attribute_Label: LTYPE
Attribute_Definition: Description of the type of geologic line
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: contact, approx. located
Enumerated_Domain_Value_Definition:
Boundary between two mapped units that has been observed but the location is not precise
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: contact, certain
Enumerated_Domain_Value_Definition:
Boundary between two mapped units that was observed, the location of which is well known and is described in Positional_Accuracy
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: contact, gradational
Enumerated_Domain_Value_Definition:
Boundary between two mapped units that is transitional over an area.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: fault, approx. located
Enumerated_Domain_Value_Definition:
Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. Locational accuracy is approximate, and described in Positional_Accuracy.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: fault, approx. located, queried
Enumerated_Domain_Value_Definition:
Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The existence is inferred from structural, stratographic, of lineament relations. Locational accuracy is approximate, and described in Positional_Accuracy.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: fault, certain
Enumerated_Domain_Value_Definition:
Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. Locational accuracy is well located, and described in Positional_Accuracy.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: fault, concealed
Enumerated_Domain_Value_Definition:
Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The fault is obscured by overlying map units, so it is not well-located as described in Positional_Accuracy, but is constrained to within about 120 meters on the ground.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: fault, concealed, queried
Enumerated_Domain_Value_Definition:
Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The fault is obscured by overlying map units, so it is not well-located as described in Positional_Accuracy, but is constrained to within about 150 meters on the ground. Existence of the fault is inferred from lineaments or structural relations elsewhere.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: map boundary, certain
Enumerated_Domain_Value_Definition:
Edge of mapped area, used to bound polygons at the edge of the map database. Locational confidence is described in Positional_Accuracy
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: scratch boundary
Enumerated_Domain_Value_Definition:
An arbitrary line usually with no geologic significance, but sometimes used to divide polygons with the same rock type, but divided by a separate attribute
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-geol.pat
Entity_Type_Definition:
Polygon attributes for coverage 'elm-geol' (Faults, depositional contacts, and rock units)
Attribute:
Attribute_Label: PTYPE
Attribute_Definition:
Geologic map unit labels are typically short sequences
of letters, in which the first letter, which is commonly capitalizzed, indicates the geologic period in which the unit was formed. The correspondence between these labels and the descriptions of the units themselves is specified in the accompanying geologic report and on the printed map sheet.
Attribute:
Attribute_Label: ITEMID
Attribute_Definition:
Provides a common field to which other tabular data (ELM-GEOL.PID) can be used in a relational database
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 967
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-str.aat
Entity_Type_Definition:
Arc features in coverage 'elm-str' (Geologic structure layer - strike and dips, fold axis, etc)
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-str.pat
Entity_Type_Definition:
Point features in coverage 'elm-str' (Geologic structure layer - strike and dips, fold axis, etc)
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-spr.pat
Entity_Type_Definition:
Point Features in the coverage 'elm-spr' (Location of spring mound deposits)
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-kar.pat
Entity_Type_Definition:
Point Features in the coverage 'elm-kar' (locations of dated samples)
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-srcs
Entity_Type_Definition: An index of previous mapping
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-strat
Entity_Type_Definition: Mapping strategies used by the authors of this report
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-topo
Entity_Type_Definition: Vector representation of a topographic map for the mapped area
Detailed_Description:
Entity_Type:
Entity_Type_Label: elm-obs
Entity_Type_Definition:
Point Features in the coverage 'elm-obs' (locations of field observations)
Overview_Description:
Entity_and_Attribute_Overview:
This database consists of eight ARC/INFO format data sets (coverages), each of which is
considered a layer comprising a geologic map. These layers are: a geology layer (elm-geol),
a geologic structure layer (elm-str), locations of spring mounds (elm-spr), locations of dated
samples (elm-kar), areas of previous mapping (elm-srcs), areas of mapping strategies
(elm-strat), locations of field observations (elm-obs), and a vector representation of a topographic map (elm-topo).
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
The primary layer is the geology layer (elm-geol), which consists of both polygon features and arc features
that describes map units (polygons), and depositional contacts, faults (which may or may not be polygon
bounding features) and map boundaries.
Map units (polygons) are described in the polygon attribute table
(elm-geol.pat). The identities of the map units are recorded in the PTYPE field by map label (i.e. Qvof).
For a description of the map units, consult the PostScript or PDF explanation pamphlets in this report.
Areal features in the geology layer (ELM-GEOL) that require attributes other than a map unit, are given
unique identification numbers in the ITEMID field. ITEMID provides a common field to which other
tabular data (ELM-GEOL.PID) can be used in a relational database.
Geologic lines (arcs) are recorded as
strings of vectors and are described in the arc attribute table (elm-geol.aat). They define the boundaries of
the map units, the faults, and the map boundaries. These distinctions, including the geologic identities of the unit
boundaries, are recorded in the LTYPE field. Attributes for geologic lines generally follow a scheme of the
type of geologic line (i.e. fault), followed by a locational and/or scientific modifier (i.e. approx. located or
queried).
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
The geologic structure layer (elm-str) consists of arc and point features that describe geologic structures such as strike and dip of beds, and fold axis. Arc features are described in the arc attribute table (elm-str.aat), and in this report only describe linear representations of fold axis and lineaments interpreted from air photography. The type of linear structural feature is distinguished in the LTYPE field. Point features are described in the point attribute table (elm-str.pat) and are used to represent locations of structural measurements such as strike and dip, and foliation. The type of structural measurement of points is attributed in the PTTYPE field, and the measurements taken at that location are attributed in the STRIKE and DIP fields.
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
Point features representing location of spring mound deposits (elm-spr) are described in the point attribute table (elm-spr.pat). Attributes of features in this dataset are recorded in the PTTYPE field.
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
Point features representing location of Potassium/Argon (K/Ar) dated samples (elm-kar) are described in the point attribute table (elm-kar.pat). Attributes of features in this dataset are recorded in the PTTYPE field.
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
An index of previous mapping (ELM-SRCS) consists of four ARC/INFO regions: PREVMAP1, PREVMAP2, PREVMAP3, and PREVMAP4. ARC/INFO regions allow polygonal information to be stored in a way that areas, or regions, can be overlapping, or non-contiguous in nature. Attribute information for regions is stored in tables that have the name of the coverage Polygon Attribute Table (PAT), followed by the name of a region (i.e. elm-srcs.patprevmap1). Regions may have different table definitions (items) than the base Polygon Attribute Table, and regions within the same coverage may have different table definitions (items). Each region has identical table definitions, consisting of the following items: AUTHORS, YEAR, TITLE, PUBLICATION, and SCALE. The Polygon Attribute Table (ELM-SRCS.PAT) has no attributes with the exception of the default ARC/INFO attributes. For complete bibliographic references, see appendix 1 in the geologic discussion of this report.
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
Mapping strategies used by the authors of this report (ELM-STRAT) are represented as polygons. The mapping strategies are described in the Polygon Attribute Table (ELM-STRAT.PAT) for this coverage. The mapping strategies are described in the following items: FIELDID, GEOLOGIST, and METHODS.
Entity_and_Attribute_Detail_Citation: This Publication
Overview_Description:
Entity_and_Attribute_Overview:
Point features representing location of field observations made by the authors of this report. Attributes of features in this dataset are recorded in the PTTYPE field in the point attribute table (elm-obs.pat). There is only one attribute in this field: Field Observation
Entity_and_Attribute_Detail_Citation: This Publication
